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 0x3bdbbe16b3db081de1a6478004b5057b0783f3be581514db3c948eb137326e47. 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/1f1e33da-5427-4c76-82f0-20ee488c688b.json and https://artists.proofprofile.net/proofs/artist/1f1e33da-5427-4c76-82f0-20ee488c688b.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 0x89c8ab0d6cad3bdcb9ee23e1509e9ba0556c739cfdbb07dcb2ed5fa322242ca6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBARL1501763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a584447ce1f7fdf3dcbd7641d8eef77bb97cf97950839d4d56ca0fcf47d490b. 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/QMDA61550511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37a88cfd158b3c1291aace9b9c2f8ff41e880c0e67cccc9b750eb4bcd85a07. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US53Q1200139.
Tower over All (A Minute in the Sun edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f5d2d625109dbdccb1ddc56cbf0f91b07bb59c92350f58908b5c53c27bcf3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:58Z), 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/US53Q1200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f5d2d625109dbdccb1ddc56cbf0f91b07bb59c92350f58908b5c53c27bcf3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:34Z), 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/US53Q1200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5b40e5c99da9cd1daa34ea31f3736cd857bf4adef26007a712c57cbf6e9a61. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/US53Q1200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37a88cfd158b3c1291aace9b9c2f8ff41e880c0e67cccc9b750eb4bcd85a07. 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/US53Q1200139.