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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 0x5c38569c3482365156b37c75633cd9b9f6ddcf37b2839d6ae6f833a1abac89d8. 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/892306ed-b282-4917-b8e1-718978fe57c2.json and https://artists.proofprofile.net/proofs/artist/892306ed-b282-4917-b8e1-718978fe57c2.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 0xd0924098f99e14fc1276bab05b9cf5b0217c49a457617b7ceeac12ec999bf329. 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/DKBKA0300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbced83cca67942a77a44d9c40d64c9f0883eac20be326b3b078b5643a923dbf. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DKBKA0300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c2a6d18ca05562d4e96b49a7bee8a384c22c925b87810c9aab95f7515af4c. 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/DKBKA0300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c83a3b38ae9449069dd6fec5e196bdfcec17c7e42f62bf8d11f5a9f61c92c13. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKBKA0300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c4a83ba27d1c0948cf5dfe030d7426e6e44babdcefeb141853af75c1bd66db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKBKA0300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625487048008e275105eb4a5b7d90eb3f1922b9a2d3a3083eb9f07bae64587ef. 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/DKBKA0300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897d21344ee2f8eecefc8532660a6fd3e1b88858779fc26c4de1ee18436fe08. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKBKA0300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7165efbf8782608a6f60dad0b787b427245a66eaadaa2c74ea9882a88be2951a. 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/DKBKA0300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41703ad3147275bcec78b04b4838d69260a2fecf2715e7491d40e0ccf64e13d. 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/DKBKA0300422.
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 0x699202e9f7afbbadc482fa27fb07762c58c00b2b5d3e517192d9dbb7d5527fb4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DKBKA0300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba8503a9c3294155e9792ac61693c1e1e427b7a9585803c7c1648445d6139a. 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/DKBKA0300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07413ea490df7ee28c4c020f8f50d77a9da1652fa96359fab2fb74f6ac95b9ce. 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/DKBKA0300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b6b18af4b27db886c458222f72c818eaadd8c265d8c66669fab1da49929286. 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/DKBKA0300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8755c306609885c1101ff5fd360c2a5892a17845741764a5a24821f527f841. 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/DKBKA0300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93f04713f4226c36e437c91d1e8e3b7c989070272af42f526ef82857873c5cc. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/DKBKA0300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28174f236724113487bb7d61a8fdb09d2004f7b6d0585f7fb40ee25d26b8753d. 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/DKBKA0300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725dbc348e69eae28f715965e2815512fba5b1833ae9a3f340e2e571461b7638. 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/DKBKA0300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9138c6ae58e10833e386d0bb693432f0bbda0f9d4e0b9fa77c8b7a85f324c001. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DKBKA0300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff4cd508557a64e29dcd1b9e2ee860ac30951626eb44cb93942eb2b6a68009. 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/DKBKA0300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd78c42130f48658405d41a60bd4e5ebe9d709b0cf730f0d3779a5a988ef594e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DKBKA0300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf07dc15e68f5cda70a321583e80bdda0e2beedc16d3d22c35ae0d81b45c4be1. 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/DKBKA0300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5959d0aa14f715cd8b96763df32c3836985057113771fe6c1718835b2807767d. 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/DKBKA0300558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051c690614d762076351991aeae04d5106e8d8d49e474bc3448425bdccdb46f3. 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/DKBKA0300560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c5935783a3266b40f57315dee4ece20b0cf2d9e74110d659f45dc8497260cb. 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/DKBKA0300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf1301296d48762115fc9c57bb8f54f5ab436f3e9747080ffb55827fa240768. 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/DKBKA0300562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7faa7df65f7a005d56c10511a3ef309be3ad8b808b3d3c8c5d012750229f40b. 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/DKBKA0300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8884e5fcbfb0d85af14f2deb43037814efa862b7c9c1afee57972f9921685bad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKBKA0300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32f4018f12e9478f6cbe018700a4a8322aaa66a8fab0cfe0530892fcd17602. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DKBKA0300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0f9135218d0140f96817f8ee7f7e5e340fee83375612e310fbee00faeb87e4. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DKBKA0300564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc925e3e4ceb4a34ac48d879fe304e4295cd4ed5f5ca3bf307db26c0cf04e3fe5. 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/DKBKA0300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ccb13804441e9ed6ceeede16bc27027dc43528f66bdfd42b7182f41c7968f7. 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/DKBKA0300549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931766467f5870c0a5f14ad3018531d62d7e469b5faa05867853a2f5d38fdc97. 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/DKBKA0300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e24c59e1373a2864cf6024e3f0e34269d18eac0e8277c7d7ed0f9b8ba71e5. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/DKBKA0300554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20a26b21f939d187a914f3271a8d79b513d92b4b71afa476fd5466155cbec4. 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/DKBKA0300555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b7de4ddc63b2b8e393239db7b7437337cf615039842d854f2885c1db75c6f2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:19Z), 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/DKBKA0300551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcecf28023b48e4a48b19bf2368012a37734a4eea6d3cede3657b604cc7217bb. 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/DKBKA0300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf0aa663a48bee80fecfcf306646db89301739080b83634468f4e1bb80864a. 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/DKBKA0300550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16defa166ab936697e33bf2718212780eb58dd46f1a7d8cb91b1639ee8c4a314. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DKBKA0300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782df79e6336c25b41c85063c81cb251bf73ab520f6fd13df3b6054aff56408. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKBKA0300556.