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 0xcae911ecd6d1119cefa872ecfdd726483b6715db29922632636f396ee03b429e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee142095-86cb-4900-bf27-91c88e46f3d0.json and https://artists.proofprofile.net/proofs/artist/ee142095-86cb-4900-bf27-91c88e46f3d0.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 0x7b07d2c352dc3bf265766bbd7795b13ef0d38fee70026e5292b324c2eef958a8. 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/QZZ7V2425023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db87dfdac22cdcd9e69dd80c9483c26d1c0eeca6e75e67427cdd0a931ef6fc8. 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/QZZ7V2425024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f06f3c1424f29d130a4b5afd903be7540420ed2459beb689e3ae56d0b586688. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7V2425029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f9f0e73318feab43e08a5a4d57e55bcf93496f2cefde40cbc2bd6cf205098. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:55:07Z), 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/QZZ7V2425032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e4e107823b72b88d99bb2d2d91d2533b352584e9d4d786a2184979678b56a2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHNB2558624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ff90cc763edefbc297a08d068560f763d065e113fa35853b56d0fe281071c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHNB2558625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6df6c9496681b456788e917a53856c7de3f53afb82e676b3eeaa5fccdaf0aa. 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/QZK6H2513093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5865be13601721b0ceff8027feec494059e36a8afa0f1095edfbadf0ec196. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6H2513094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf1bb193e181eb8a546c8959ff1ac82957f0a94ef32c8ed0ede688cb05a389f. 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/QZK6H2513095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90574aded6185d7acb8c42bf193698d99b9525f08637e8a13d393740f3a4b43. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:17Z), 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/QZK6H2513096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7751862927b7c9ce5e8076927a40a1c42b8659554078e876c4012c1ae4b5c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNWV2512598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf14f6092d8f1bf4f6059abada2c8c2aa1ac75c7bfc878fb1554849016afa8d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWV2561131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7751862927b7c9ce5e8076927a40a1c42b8659554078e876c4012c1ae4b5c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWV2512598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873613b3b914513deaabab700ce6d5ab5b0d8539f430caae0fdee872037596f2. 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/QZNWV2561134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f084f8e419b7b94176c1aabe3e8a4eb01dbd5ef543f7c29362fbec5329533. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWV2561135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f807298c7d6a24ef2e57e5915fe0b7fb80676359c9cab254174ec0cb7dbc487. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52538865.