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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc58ccb8a7a1a5ff11c4cde9681855fe7b1487315311486dac04c374591f83b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19c12af4-0d5d-49ee-943e-67c136844691.json and https://artists.proofprofile.net/proofs/artist/19c12af4-0d5d-49ee-943e-67c136844691.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7109876f1155507b5211868bc7ca839f73c825eeebf2e4e43af205ecaf08f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFYX2196510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63314bb4fc65877161921f51a48a1d588701ec62d1b0686ad60ed4baed8ca02e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFYX2196513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf386f5c3cb736d475c3ee3a9b174270bab6019c25839fa12d58abd82ecca9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFYX2196520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d7c6524d88a6fda173d659d50c6fb2f54649b546caf0e2baeb104c6193d85. 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/QZHN52205064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdc4b7d78c9a2eac7dc91142d35356b3235e2983aec9445aa2016688c0f10b5. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/QZHNC2267515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ab913cac68867a9be787fc55f4ffb827672efed51e957319faa455cc17c55. 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/QZYFZ2337540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404390fef171038e562ec3be9aa8750686ec74f9f4f959cabc2561796e325dc4. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZTB32238475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a5e5846ac0d427f37686df908a45cd2c882cd9f2c5c4be5aaf7f2087e8fab. 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/QZN882595168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc26de48ae74839d575fcbc7b943d9f47a81eca8e97c7c86f98e1727203404. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZN882595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f4423a65b1b43ad3fc6a7c8ec4f53d7a5f6e11e62ce0daf6a09a03d1b6a814. 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/QZN882595686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bff288ad97a26b1e3ca4d69bf8033cab23043fb08ac7cad74e560c44dcfda8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZN882595687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a5e5846ac0d427f37686df908a45cd2c882cd9f2c5c4be5aaf7f2087e8fab. 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/QZN882595168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a690452a48672708e2951671e70fa958f63805cb056da7df387be3e4913504. 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/QZN882595688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062d3b0a637ef8ef6afdda24a4bc508307bc9f928e0649ae36c199dff2b74d62. 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/QZN882595689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124ff256197fe8d9e84bef6820f34224814e542128c69731ee0d6099a6301f3e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZN882595690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b549de7c83624a8e7ac64141fe900c5392538303bbfa036e16e3778687ba78. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZN882595691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8707b43c9e6c4202498ec4f6d9a90a4e9ea53661aa7f20af7f5bfb629350e03. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZWDW2504362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a16a4cc4f6c191f40bbd3cd4a4ca6089417e83f51fd776e999246ecfa14a59a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZWDW2504363.