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 0xbee62ef7966d237e1e1afcf59b1e51cb742925867b7f09a59380779f15d2e61b. 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/d6b23e5f-2b05-4d5f-81af-0faefe010f6a.json and https://artists.proofprofile.net/proofs/artist/d6b23e5f-2b05-4d5f-81af-0faefe010f6a.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 0xb1c991132dff33b1dfaa96266c342da11992a7a2a10bf0446cfe8361ba4dbad1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ9Y21796682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ca154f1b6517cd296823c87b863db18c9337772ddcb64d8d9230ff6c08d587. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZAPG1896274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7b0087e476a87aed3a38882248e72592bc358794362fd4af9819c230d63922. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZBRF1880061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab3da69b0d91e95076a4ad195913cc36770f43d85fe34273de66b9f166d4f3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGTH1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab3da69b0d91e95076a4ad195913cc36770f43d85fe34273de66b9f166d4f3e. 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/QZGTH1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71969a3fd95d124f6d6b44d4b009048f22083183e5817d3ad132fe6fa39f90d. 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/QZHN61938827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530e45588a3a08579f5806adc8197c4cb037f8cd0c7ed7ba9c6e23e917bd807. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:52Z), 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/QZHN61938831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3098bfdb65f908b282d8225059faf4bc759e356e9d3562b5c88fc4c68a388a42. 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/QZZ7R2402198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e546b4655f8d5470473ad29d540fcf0a92f61371dc9c5b52dd82fbad56c35e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72596839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ecd7f1d4d1a38ce2e7de6454a13762defef10f9432e8aa4e61325a1fc47a24. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6J2586366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec6306caec334f883ddb88ac72af408b5b834edc58bcc75480d8de580e946d6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:19Z), 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/QZZ7X2566349.