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 0xa12bbe40646d9f4f4f8d637cbebb103e81ecd5f1c99647175df5d10fd7dcb2a3. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fcd8889-b1a0-401b-bbfa-f180ad504655.json and https://artists.proofprofile.net/proofs/artist/9fcd8889-b1a0-401b-bbfa-f180ad504655.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 0xadbe6d81f02c6f206fd9798b079501a354fb0aaa3f0b7b416d94baa61612d7f8. 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/BC6M22409659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f221780aa1de439f9feef88081e8293733fff85d96224d4c2cd007157865e86. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:16Z), 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/BC6M22410476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce6e53c022c647642b6b376fd4edde905a68fde3c03721c594611fe7e18ee50. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AEA2L2173068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56104a4ba9036ad51aa0264a8e671caceb30e8863871098de143b4770b5d236d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2L2506158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9170265c25c52821a96587d66b7bf1007f8d98b8f4317e4e9f54735b45373f98. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AEA2L2506159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d1bc95b248ea0a66ded2da5e185cf111f5eab8a4094b1f8afd9c9014058597. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/AEA2L2506160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978c7d7ed95e0478088de9721cebb5828334381e31594ad86705d066b11957d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2L2506161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb7257a17642d0a2f502cd63ff953de4569fbdd9c22ef9e4e336eaa8b08303. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AEA2L2506162.