1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb30251ef939b6b12e079b7d7b4c72fcabf15978056fdccb665e3b2b4da977. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/930cd009-a9e2-4a49-898b-9c09fc562214.json and https://artists.proofprofile.net/proofs/artist/930cd009-a9e2-4a49-898b-9c09fc562214.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f2ad31120df15f12bb4351d1489b887111eed3d5efd38e491d2b0c136d7162. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba425825c3313c27534c5734cfcf8adc6c391d5c48fbd82126f5448bf2168e7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cac38999499e294ac997005f47b921d3b30599a41dc657a768af82a5561d1b. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA559400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe830f3739da46ab77d260d8e1e67765245de7a95a631ae760787bc88ee60171. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA559400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea96b8a43dde824323378207d9354ba8513cd71707e4ec581e125f96482818. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA559400096.
Grosik 3 - Obok Nas, Piosenki Z Lat 70-tych
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f68829bbbc9a7929cde70bc716703b4863fff04eeff969c1177f96b46f5157. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae845002e945fe7f0e7988fc97d689a1105ea0b8ec0f6839f49c873d7e23aea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df3bc54158bf1bf09d1633c1be8b52201a1c3e0e28b2e4571c9a98ab4abc886. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b086a92ec745b39b7a00e84bee305a3331760a3d78d2c13fd62dea08f6b3cf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1710d97c7f4803c2d32923f5843587150a36f147154e64dc29f7f2f0cdec76b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3bb853f53c5be438de4feaf3736fb2fc6de9fb045f321934d6bddd0b94536d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6261491caa0cc1230c242821cf070cffdc9bafa9a1d5bcb1e90e9c5bbfa69. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eefbdac845b1f1f8b1d0f0ed50aa73fddc8c32f1aa6d0cd67cf690f4141bd07. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48401007ecf3e4ed6b4dee746dad137da7d4d0a12def6125ced387f71d7f24. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea20acd9f1a2edd320a60e1e2580033089453ed95a61e89d3db8f07a600aa2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e8bf316b85d39479cc5258f27ba57c868a14f91ce9952507e82c0bc34e66c4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c59e285d331096a2d38dc862f37d8cb7829edbfcb4d86a891fb4d7744df1a02. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a70fcf85c1ddb518965f953f6f900a324907743fc288c025dc4693d0f0d76e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fb33c28ee79deca36c3ad129245d942bbe2b4a71e229406bb0dd530612a1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f639188e3c0522613cd9605afe9676d4c9c0f226a928de76e30e8d9cf2f340. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622aec57594bab56150c7aec4d0e7152cd86ef94e659248b72a47871626b86e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f32867b358b1a7444b8a5eb7d9aa57797be85dd4ea143573722ff457f69419. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce63f8adda84c21c38b5ce32cc3513c4c33ecb0bb758744730df51dab0f17b87. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77160e76cdf847f4478781c7ee21ef255e370d7eb800eb361d4a04655a75bac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110aea8d7f3b0551ca6d02406117b34c01e5654844380c8e9f184984060c883. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240c26f0c0156425a65f8e09010e4f68ab2b76849675dc6e4f41b8fffdc678a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578d6a26479b9d2161febb5735c88211e6994ad0c36bae263a81ff2944e51f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf278bc7a7b099e3694919b750c255f668df46630921d9fa10b97b0376896b89. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e3579565b2bc4df434d2d6c6592232747c1d58cf45e8607a0bf68a15409d2. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d86b6edfbc8213a41f98816bd1a34a061bb3756766ffb08f907d4b60e6ea40. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH400000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da441cb021b0d0a4bd6edc8417cf585b40fd987fd45e90a1f8fb40e8f91eb3a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87dadd19cf0dae15e1a09da439c6fddb536ea77489631deb33255b05d5feb16. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ec78d21912ab66ceba6529a865ce08bc018b9f1094cdfc40d954c55e15db0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8742e6562586afb2e5388789a77a8daba874dfd5596c8f4ac811bcfa811ad. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4dbd3a1057aedf3c99f1ac9ffdb1256bd3d1f92628f80fc1d1c8629b8450fe. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7af5d4cdce5ab828fd7b992dcb8920409ed0d9b177b2678cbc760a39981b13. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5aea6da41122353e8b5ad919d99d1846729fcdc0b4d23e2b765e7c4e0c82ef. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA551505293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae81ae1a49eff8444602078c90df1bb1a1a1dbb192b1706c2623b69b62ea01d8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH402000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7ff325aff82f6f680525dd9e9fc6c582d6e349c5c3aeed9fc156a36cc886bf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH402000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f48927609a10ccc5dd8fdd879770dc8647409103f9ed6ced26a3b2af81591d6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce9d10aea7c5428b81b40996f2b42909c8c95a7626f94db4898e73f8b47ccc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80ab90ee1b8ad674b6c3832d92e93d4463fd279cfe876ff08b6cfabf138aa10. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87867f360b7c4f821e8923fe45fc22239897996dfb11c7743fa536db8acaaf0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH409900016.