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 0xbf5a266fb8830bf6acc5da3695dbcb16166879cc7997a39d9d2bd320ed859a29. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3fab6b1-c4ac-4888-80aa-1fdc88e664fb.json and https://artists.proofprofile.net/proofs/artist/a3fab6b1-c4ac-4888-80aa-1fdc88e664fb.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 0x56a70ae783c35711f84bd4f25f567cf83b0a53c32eee2f241b8aa2b93566107b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHZ31942818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0811ab93460a024b4397cc5abcb390d89b4256512d7d2b1c1e2eff77118a5185. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJV2046641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552d0d6a8eae9655f199638c1045cbb26d2f1dea86e9fb8bf7703f0b66d18d7a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZNJV2046642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b691e977a89eac53b59839c2a8c6e48623afbf51a47efd2220f12a3375c5ed8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZNJV2046647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543a19bd15f5a26e948d6f292512d111dede592cc078c8c0f0024291ab3d8b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJV2046643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff00cd2f5868407780b6a1b495ee376806af7cc392ff2131030baadde771174. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJV2046644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb92a9a3686b011d5eea43dd29a7817437c6b56b5332e71e4f6b0f309a06aa. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:42:09Z), 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/QZNJV2046646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6444a42bc8ced71aec86ffc960a45eadf8935fb37399f579f3cb4298856929. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:02Z), 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/QZNJV2046659.