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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e175675e8ade52be0a7610617a4240fc10b6060cc5d411dde353f88982ef89. 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/e63432e1-8afc-4c4b-9757-a12b3cd29343.json and https://artists.proofprofile.net/proofs/artist/e63432e1-8afc-4c4b-9757-a12b3cd29343.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc122eb9158605412ce19daf47c5661ff876f093f7f819887b1cb54591a1d5cc8. 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/BRUM71705649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a944e605b281b8b40d25729a028afb937119639981a366c1743241adde8b2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BRUM71805310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1217cbe1b6eca6c23cd00bc36a5e7351ed96359f159b8209e8c75cca377796. 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/BRUM71805311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3d6798ec72cfd1885f694ae8d12a9755e565e766853d951debd7d5381e77a3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BRUM71805315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61dfb6c4f1ff7162aca83a9db5fdc10933b094e60f6ecbf308a5a73ee1e52e3. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BRUM71805307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8cdcb9f5d887e98d25c856faed0779968f67960589385d5bc9f32bf27faeac. 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/BRUM71805317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde25a803938787edeb6355b45e4ed67740400d413d7fe109abf2fa55425fb0af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRUM72002730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06222fa053b263ffca3a24af9f4d19ab1d06a1f13502fb0aacef16efb8ed019b. 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/BRUM72002726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f9583c7f8477e88c17e9c5c1e582c866521c2f7f4c767139e7266957c3f59. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BRUM72002669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7e2167b6b0b78c5e49da3cad93eeaf32d1381d8e3e1c79c339e20fc5d30b43. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRUM72003211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ef8e9e809c5a4518bf5c8282326164899931aa957b42f0dfe208f814ced52b. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/BRUM72003716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b01c3787adc8b812e176c5e9bfbbc1566d03d6d989f661eef10ad75d9b5ff7a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:50:55Z), 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/BRUM72100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d2e848a8fb367b0e60ea4ce88d4af0ba31c3a4d46ad07d36546aaf97d5ba46. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:37Z), 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/BRUM72101753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d9e6fef30a1e2c8a3e71c6412a3e5476bcaf047cdf6096161a962b5a0d47c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:04:39Z), 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/BRUM72202086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9c26d3123f76435cc12b549950326957a6470c5d842c08adc265d17ce3c33c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRUM72202081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80436726610649aac83607a9bf42c29e7c27312a6b72481193543fe0deb79e16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRUM72202092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae67a7558446c22e73b3ce8f4906a48d156f7c0e3a12f4dfc57daa48fd42c5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRUM72202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eefea03ea714ac08156fb1fcf42563002aa10b6e2de05407c459b778592add. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRUM72202088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9639b5be899d1f7606d2b643e43b46e4b838d3deebff261251f74067c78e0a5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:25:36Z), 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/BRUM72202082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e9a261918bc3788c7d8b4c4398ee12ec0b83d0ceb5405523e97740abfd7344. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRUM72202090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b7d631f7fc924d8423ad924c2a5a8b0a565d68932307d9177c4a69371a578. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRUM72202089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5fd87c781a2608341567d68fc3be3f13043b1b5be490eb7e1d0de19a7cdcf5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRUM72202325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3701116625edc9fc194870c8d88d3fedaa6dd4b84576a31744d9c053c8efe7c. 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/BRUM72202080.
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 0xec24484fa1e64b4b2b830e6505a2a6d415122bbbfb3e51d133340857b3bff351. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRUM72202326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf679966f3c1658fde473be9c422e1f13e202eb31cbfb8e484b6c300d224fe330. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72101886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55feef6f242e9ee5ae086674ae03cbb6d232b4bbd50f860d9fbbc95959dd8c26. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRUM72001144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55feef6f242e9ee5ae086674ae03cbb6d232b4bbd50f860d9fbbc95959dd8c26. 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/BRUM72001144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5ac2d0b5d1c9f55667ab4f568866e7b136cf7feb48b4ede25f03557f2c6e5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRUM72003140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56258427ab397292dd81bd1902eb7ec4f603c81ec7ca88817bb58c1edd650123. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BRUM71802193.