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 0xbb3ee3d5609cc74ff5e989bf99e7981436cd7ba7ee137106d9356d25748344ff. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/640832e1-9615-4d84-9294-948566b65e5f.json and https://artists.proofprofile.net/proofs/artist/640832e1-9615-4d84-9294-948566b65e5f.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 0x92de18d9a27ac8aa509f573cbfa1e84f966f8e771d4840b0d61fc960c9ff6fb8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGT2369513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48a286f0036d2e469f1e434266fb8196a33d3f242747a443576492d21413a81. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAHB2306676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d12d44bfdbcae11b4f0fffc88784ac7e6faf1d5598a03fff3f775f5ba2e0a9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:33Z), 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/TCAHD2329280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fa8f9a84d312c8f3378e9d25615e3486eaf49e064acbd88ad7ced7fd2692e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHM2308500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cf7b19cabfba1431cb61c610d29500033ab9866e6ee24b1773ef15ff9df5ee. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:55Z), 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/TCAHN2392793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715b1855787e557fec40b534049e24a9944a145b7d02308a0cdb1f1c17ef8b26. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/TCAJH2554276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb57be10b5222fb4eec5bc17cfe659e84d1056afbe1ebac85d60e7c2317efa23. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:09Z), 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/TCAJY2518527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39f7ab8aed742ca52496374c6e68b3457711fc04e11121ef1428488a99c6541. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65Z2574994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ceb7590d6c3cc9560840707177c7f8c31c5a5fb3ddc4015452ab72c6c66677. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:51Z), 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/QT6622508014.