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 0xc6692cdb7db2d83e4a55d28deabe6cb31b972a0fcef9d1ab8492944e85cd58e2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78dfccc0-0af0-48da-b92f-848288ce7705.json and https://artists.proofprofile.net/proofs/artist/78dfccc0-0af0-48da-b92f-848288ce7705.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 0x0b79117de5b2610392f1ae7df874c081ed041cb080753efe736fa379ab941f59. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAIB2498954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634323a699fa3bbe75d7e573cb3898bfd052409889826479a3b49d9ef404de6d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIB2499024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc8ade478f0703ceaf0de8f2aa058d51e156263c737151da97dbc0d1a51429. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAIB2499033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b63d680c9e925602455425391b15024a3400f4edabc1625ac0e63771413496b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAIB2499143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb4fd9f2ab71c22f964cea6736170fe8db304ef108eaf81c584802718e68c2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:13Z), 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/TCAIB2499258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336be0c0d336bec7f148bd1f281a27734f6a8e28d847e5dfc078882092ac778. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:20Z), 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/TCAIB2499182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b725486380b4c68d05a033296c5473fdad90cb7a3b55efc4e38960bdde401ab. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:14Z), 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/TCAIB2499010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2389e2c335ddd8e5b0def187e16e9911276bb9f99cfa818664d1d554c88ba246. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAIB2499336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383aa1d74201fdbc02209df315419b8cf1dcdd39e9497dd581bf9c8d653919f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJQ2539326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbb86d8011b765430038feb41d4228f2d83742688c42f229f7411c191710763. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:09Z), 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/TCAJQ2539375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a961bdb5c0c6a37e7df117078a638f377505759b20e482a2fbccf7f306d93. 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/TCAJQ2539390.