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 0x2cb920047e14a66b55708ec94c95b7cb33ea46a09e2001073c824168503cb802. 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/f0a566f9-072e-4c90-af64-e1f41127ad3b.json and https://artists.proofprofile.net/proofs/artist/f0a566f9-072e-4c90-af64-e1f41127ad3b.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 0xd64a19a3ad5b308d7892301a73b052a53116b4a7e0c449849cda0440081a818b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:08Z), 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/QZMEP2493215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01119192110f199eb0101136c3f8fb2f69e2c9130db182cf2e0898fa2e6f2673. 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/QZTBC2400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dabbff4e125046689cd3093a6f8df716c39023fa3c6a223297cc2366e85c6ee. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:29:50Z), 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/QZTBC2400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683d0aa30991aeb750b94c4e84aa9dbb6e2a590f04209c1355096f60299cb1d. 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/QZTBC2400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6ad6051159d363fce894eed3bf10160380d7685a84e7beafde597847c0a53a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:26Z), 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/QZTBC2400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d0892921b98bff239c298c453d0d466676efd0a9302de48f5ab8b4f7e0bfd. 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/QZZ7N2419205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199d47b88704818a8b37182f0d20939ac20a3f2c7513fbc46529c7d0631c637a. 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/QZFZ42503377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a9530edec0f31f8fff5db4a5354e01090c85a92577c1cca310c60a692c982. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6L2511651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5c14ca2726df861d31790502fecfcbeb2950a47d3795489190283ac7bcafc4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMER2554996.