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 0xa0e811e0db640e0cba0d5191638ef208ca6b066b213b22c841d6eb0af9bd3495. 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/51967b80-651d-48fb-b659-3d43b4951b77.json and https://artists.proofprofile.net/proofs/artist/51967b80-651d-48fb-b659-3d43b4951b77.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 0x91b3a9aea6e147ec4de56bdc909245a895ba27cbef640cfa58564df10a8781c7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJX2154479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecd6245a1a394d8e13df29866c703c75ab8759c51b7a19a25d141912d43f03c. 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/QZNJX2154486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2647b9343db8be941f0efc0d8ce723d35d7a57d2c24cc820b22695c3805d03e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJX2154487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc807b710608c0ab81e7e85872d0797bb855de05bc9b7d1d8ee059c79c22145b3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZNJX2154491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67c2190b69668f87875bdad7c7349a8f14d203d8e38e81486024f728324a4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2391219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b522ea1d6f187a9209d96e165a5816543df166076a85a3e63da919c0b0b686. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG2391220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b860beb8588d0c7672beeb453394f048895f4d21a60d1de373acadca97e972. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG2391224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0b4ebf3708e44a637f9a5f82ebe16df27eb4504eed46287fec845fb341a37c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:10Z), 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/US7VG2391227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cd432e6580e800d62daf4341b6a6201e3f25f6880711d4da0ca5e09b48376b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMZ92374246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e113428cb2f938c1e6d2ebb757584dd3443272c457eddfcb80ef2d6f26650. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:28:02Z), 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/QZMZ92485634.