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 0x6a2cef5d502dd967251cf787947736827d1728057d62b90df28735fe45b45886. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19882d4d-2626-49f0-8b8f-c49a3318ba40.json and https://artists.proofprofile.net/proofs/artist/19882d4d-2626-49f0-8b8f-c49a3318ba40.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 0xe632d73c1617904eb48eec57062df2f8edb4ec76c2bbfd15400b57ac41f2e4df. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCACS1622038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7599d59440738fa08b254f376bc2947091adeadabe274998eb2b3c35a62dfebe. 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/TCACS1622039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a4da5b4ba93e0d2f75ec7d5b1fa680d88a86026ea3860d89fe5da97a310c18. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:52Z), 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/TCACS1622041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0422905e6137c8a0f61d5e4fb66ebfcca07ff387bc9f049fdbb9d69f8af6dcc. 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/TCACS1622042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3779a941c4a242628ddc817307bb712a4b69d7bc3dd47ad96b95d2823fa91. 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/TCACS1622044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdabcdb997ce493315fb1747c0096cbe0a4232b238a81a8d81bbc4e0b88f76e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCADN1858874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c839d67ecab9479e7b0f86ceb728aff75ebd44e7fa8d5f06f5bae64b0d10fe9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCADN1858877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f8e0075d93c4b221ca98a83f3d6ca08b424e0b930ca74b382edb78fe156a63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADN1858882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b611333f3290d72a48be32d136af09ec9929047d9c1e8f0cf5fc9be859b3417. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:32:16Z), 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/TCADU1865791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6a548c00e0aa4a15f615a38f48776f585310af0d1baa5477aba51a6861450. 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/DES561928003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6165df46b3aed431df4b26000588cafb5c10c77536eda482fec60a69d19047a2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DES562016202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d1476c0f44267305f24b366a8048ac1bf51b46c1cb5640a826b100a5f80813. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DES562131901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195f378b5412d87c17255b0ec2081f231ff79c717444cb1f64626fd6cc053a94. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DES562511668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd375501f61f4c429cd36d728883f66db07e1f411a8931e33089096edcdd0df6. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:08Z), 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/DES562511669.