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 0x9e20af06cdd464dda30346aa79580d59c95d0a83161eb6a9f934615e5e61a532. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e46e9afc-5c4f-45c8-a9bc-a9a5dae15d59.json and https://artists.proofprofile.net/proofs/artist/e46e9afc-5c4f-45c8-a9bc-a9a5dae15d59.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 0x708f5ee4d7a17d1922d8aeef9b62152ab9ade380dde7d94029d4c3a1cbebd149. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:27Z), 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/ZAB331300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d2fba7f5f5406f6b05ae01b03cac3d0c197a5a308370d41a3f81d36a08bab. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAB331300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f9aa91945d9e2ac62c26170ef18afbccf534d95159eb39fa61fb07660816d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ZAB331300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a067925da3d5de6a5826e261227b05140799bc483e3bd1997d6b8e2248c4e9c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ZAB331300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53286ac3c8c104c39441f60b3baf0d7e701fd06bff7f6369275dbe6eb3aec1a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAB331300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02677a35ed3aebb33d35b5966bd2d29c8b66b6d578a3ba54a8af9712e70db299. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:27Z), 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/ZAB331300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd811c6fb182a66087e9c1deb2d6f9d66a00b254bad803879b70d233ec2558d6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZA56E1405479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda8bd0ee668bbff6e005a30ef224602d03febac9b84b1eff2989c320c27d49. 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/ZA56E1405490.