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 0x574a5c4e9a4efdd781c025729d9ea197d3c41f9fd5066dbf785e6fd47ffe19b8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa592d12-6f50-448e-bcd1-4e37cae703f7.json and https://artists.proofprofile.net/proofs/artist/aa592d12-6f50-448e-bcd1-4e37cae703f7.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 0xcdad7a5ceb6781197e24f911eb95f86177426b9bdc0d2acbf4329391118198e2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6P2251429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f82894ef7b38ff81248c18e996af1f465f7b3f7719e655182c62ad906fa500. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB42449137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0705674a787354cccb114816b89125d14f21a968806e3fd3d16525c5df39a0b3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:56Z), 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/QZTB42449138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ddfc67eec0e68da6242dacf1da9527a3cf44c3033b728bdcad07a2e41ac597. 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/QZTB42449139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0eb50b9ba4bad842b7ffa9ff8371804a46be882a270bc26cd14e04aa1c91e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42518869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39df954c018e1e1a79d10e58a8a104d82db287343014668d47140769ae87aa9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB82499801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bd21b36cca6f0da696f1fe3679a10c03816fc2dfdda91588dbbf14ad5449b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:27Z), 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/QZTB82499802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98bacf361ac80653e49fe297e39d2f3eb3d74fecc3c8a2e27d43a6022fe6735. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZFZ42518871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe82b83ca4e1fef085b3d1c11f53a60847cc3daf7ef4c4c22c588abfa2aa49b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82585310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc65ffbbfef2fef14cfe1159a964980ffad7de9d0ccf9fc5c1bda04d9268e89. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES82585309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe82b83ca4e1fef085b3d1c11f53a60847cc3daf7ef4c4c22c588abfa2aa49b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES82585310.