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 0xd7af5887a38e760c7ad9a133857eefc9912780af8c489d1c174f998d1408a5d7. 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/11e1b959-3839-4e89-a77e-f5916dee77fb.json and https://artists.proofprofile.net/proofs/artist/11e1b959-3839-4e89-a77e-f5916dee77fb.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 0x523e58e8f2c14b38f110c198a308f475b0cd4a6aed3f2bff53693b62c6ae7803. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRB7B1200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d3e8629259ed796d35285dc4143207de77c812dba22c67b9f614e8289928ae. 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/BRB7B1200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf335128613736af2aab3a598156e272a116abe54ab514c37e85fe7440ccae8e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRB7B1200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956de23e357ec62aea812706fe194cd956f6414cfda102aa8395c01aba048b9b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:24:59Z), 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/US7VG1475354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9259a5b339d8f3a622c74918eb519705b270de66f99374bf69cf6aa828c4cb1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG1475356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb4d3472df6a847be84ab1a2e6ba30a45692e7a19eb7adf723a509ca56ca2b0. 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/US7VG1475357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79292bbdd0778c24d1bbf4082b0cac25e9ceda906fd75a5b56163acd53cfb056. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/US7VG1475358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b6677d6d58cc81fb7c429d7a883b2880368407529979fff2c9e1f50c535529. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:17:33Z), 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/US7VG1475359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d6ee182ef1b99739cf0f02d3963155effe94390a9bad7805a7b603ecc95ac. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US7VG1475362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceaa29b9934aab10f7ebd38702837ec666875c5e00321956a52773a15216d44. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US7VG1475363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5bb711c3723b3f78f4d1408ff2a965a8842cea2f47fe973876d89ff47aae5a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/US7VG1475364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25100a0a1a4d334eff49a2511801d59e772d2ec4da992571a4a22b5f7a0df67. 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/US7VG1475365.