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 0xe899ef4b3080c52b686625daf450fff56d388f4e386d8e5dcb44665e1fdba64e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8cbcf2f-5f15-4fb6-ae44-01a39e85e48e.json and https://artists.proofprofile.net/proofs/artist/e8cbcf2f-5f15-4fb6-ae44-01a39e85e48e.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 0x42d9a747270c22c1955d4f799b7584c700dbd7ba990decc56e6319cdf67052fe. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLFP2567195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8d11674a2b78bd1a53bbea2f3486e83ca605477d6d93de6cfcdb7f8fc9751. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:00:27Z), 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/GBLFP2567196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aaad71913fedbe6b48b3b4a5a5c93564797f03aa09fbb95b6bc1e477bed229. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLFP2567197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388969e91cb6e7dcb3957ad12ede38cbb874d47db6a9c2aab32da054a5e50935. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:30:59Z), 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/GBLFP2567198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd131c199e69c258f400629c066d6f02bc7862149325c343cb21f979f461731d0. 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/GBLFP2567199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2248103d1c204427c1f07fd79acf0049da072193862063f0f47886897760d7a4. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/GBLFP2567200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b912a9011c995bc2e9b383ac1a3e117936c07ba21079583caeb872075214cdd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2567201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46510d381b566fc3cc8dd5f2b2204f548d8c60661ef8445bf5fc143f8a12b9be. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:03:42Z), 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/GBLFP2567202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b3d98f154b8331d89d37d61b79dcbca8a14e793cefaf56b9b518ebdba650f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:10:01Z), 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/GBLFP2567203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da54773514368d9aba6fe7f7ed5751860232c6431d796bcec4e4f3d01a68850. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:27:49Z), 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/GBLFP2567204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf1b1ce919f54ef11efdd92ac82d02c6e2c20bdce73867bead1ab24b0fcf24f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLFP2567205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d907bc423af9b4178865da709e6a7a1117c7df59391c5bf1867c77e17781932. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2567206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7242641bef1782a675b379c6f2081c14274d1998e84b4f0469e99e97f97406d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBLFP2567207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acd63ec33e5605ae358bd4fc356b77e9d8bc6eec28bcb77a39546646ec1bd68. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:20:16Z), 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/GBLFP2567208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7fd885093f77b9d9a09c6aa8ff7b571c26aea87cd66dee67fccfb6abde124b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLFP2567209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688c36f8a3afc712a82164d59df7be8fbcd8e15e4315c5a1de8f531fb95ee39. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLFP2567210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb5a3bba40efb718a0b5717dd54149260aa895523d0ad0671b4583a7ad5b517. 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/GBLFP2567211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62db3571bba90d53599420c3adf43ae49e7bdc47f0f47fe96c6585a4142680c4. 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/GBLFP2567212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7d006cd8d9dc62857287d81241e685a1c6b54e022c8d33abc283ec7420b13. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBLFP2567213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a79e3d6c5f389ae4cb72e8ef284546842e60e92b8c3a0fe58d3923abde6fc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBLFP2567214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422dd5eb08b501076ac56349d5f3279e17b662a8a11234572843b7d3b5970b8. 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/GBLFP2567215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f0447ef00734ccc894ed5a4d1596fc8b42983cba0a03e81f633fb0b5687ec4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2567216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329edda682857e4920d71faf3612b615de5d0e0315b01bb5a51aa4f1ec26cab6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2567218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296970c2c587aa56b42d60a19daa0811a35512e79ad70763e29439f815458de6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLFP2567219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bf0bf63d94b6c159450398b8c82a3a82b333525447eabc000b9707d34112ee. 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/GBLFP2567220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0510e8846c29375ed866606407451ecbbf07a6118b0dab39ecc5e78255587748. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLFP2567221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c34f15dcf225dc88edef21fa4ec763c5b271664efa1cb52c5c135b317eb10e. 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/GBLFP2567223.