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 0xcab7c95986c993a672fc834f4d5a976e45b9a7ec2261fb98f8e96f584429d5e4. 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/a52743d8-dd41-44d7-9cf6-d22863f43f32.json and https://artists.proofprofile.net/proofs/artist/a52743d8-dd41-44d7-9cf6-d22863f43f32.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 0x33dc65623374ede4f67b21a4a1ae52a6f5561d49fe4dcded5c11908122c80acc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:45Z), 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/QZHNB2524541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd375e5d66bc65bdab0b748e70defb4f8f904a19c5fceb621355f81145907d3f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHNB2544479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2341049bbe2d8c352df7c1b8e558acb453c2c6d0ff128b9bf0abd4b4edc91d8a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNB2544484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120493276049a8a50dfd01b7d25d90f6962a153d9dbc0c43b24b5ffacad9dfb6. 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/QZHNB2544480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6c8535a682aecd5b03fdde1b93fd09c66385b969c033a3c447fb28cf5ba77b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2544478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4784e5546dae6f89f60fa0471b3e8ffc6c3eb2b738f5f606eaaa8b1170db7f5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:16Z), 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/QZHNB2541210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc781061941b575ba66677f0135c672729cda5e97b1224021d392e3e904617. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZHNB2598205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695598baf302e532c7ddc425f78b946c9009007d0b4b42e83aba81a5c4bc12b. 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/QZHNC2549949.