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 0x2e6cc6fb1df4c8d262822e3608ce942925acae38694e16d364cab58c33a739b7. 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/b1692388-d770-4078-b798-bee02f48de1e.json and https://artists.proofprofile.net/proofs/artist/b1692388-d770-4078-b798-bee02f48de1e.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 0x5b9376b4c59c95b20bd8db4b47e210581532ea48a134f4a75db2d757f9fab587. 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/USHM91165228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd3c1967af72801daec74a3b872846cfdaa795c2782137ad03fbe68aa80cd2b. 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/USHM91165229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439a113298e872baeba602124099db9e2fb4e9b88c9d1d8479fe42fb011e89b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:10:22Z), 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/USHM91165231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf8b403f6aefdd23e6ec345df2c2f54395d77aa82c703dabbc52240ed1c17c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USHM91165232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc929ac055eecefbd4f356c6d6accfb0b13883aa2cf26f787841c56a6e1905342. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM91165233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f00fd6457cb0044caf1bea82cd4ecabab660d565b020692f400ccfeb7e258. 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/USHM91165234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fad1cad5261dfbaef1e3488687bdc6b0568d738d7e10c0ad9d493e05bf8a41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM91165235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1048794d5158540d99d65a1799c8e44b458e63e03eb3bd547e8ec2a1916756. 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/USHM91165236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68b0ac2996e4e805d9e9fc199ab358ee0f3013b14923b1308d4d4200e545324. 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/USHM91165237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e69c209bfe0d24105f5586e5b863fb528276fad281eb2b3021f20fa5b6345. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USL4R1830687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb9464ea5d5f133cb135283e232caa5b9c8adce77ac9c948a25488663230f23. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4R1830688.