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 0x2522e860b7d4d4c3e6ac23a50751758464805c590107f2c80c49deb1cc36aaf8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5abcfd46-d077-4286-bd0f-d2155c85ac77.json and https://artists.proofprofile.net/proofs/artist/5abcfd46-d077-4286-bd0f-d2155c85ac77.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 0xa9dd3d69840eeb3e268301bd2a4a862a0a473af61bfdadcab762ed9b869c5237. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTB92421930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0046686f7886ca22f1681dc42d9789c7fa17c4a07b6820fe2507fd1cb6a9016d. 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/QZTB92421931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ae302355897b8a8ce49c0d1c3052d29c06cd64cd3d1b03967d15f93ab0118. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:29Z), 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/QZTAT2430727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53539a9953a2805974e86e1be06b021a9244855c47401c7e1248a114d58b7949. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB92421932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fecd144ff6edcfe569cc9a4b539389cb5592ac52c9933baa64b724e3b2f42b. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZTB92421934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4688c0476009d2486a1430bf7c75dcf6cd84ca0f80f1def4e6883debe05e0f. 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/QZTB92421935.
Ack, Värmeland Du Sköna (Dear Old Stockholm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa0bb5076d0b104bf481b78cb3efbba074ada7e66c79bbc903fb1b034aef825. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTB92421936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81f48863bb3da774588a6586f53c412d68e951d906f7d4e3a93ce1a25fc0f8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:52:29Z), 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/QZTB92421938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f1031571e2edaf1ae77baa11c4ee440c507126c08722cd869d33574f54a8a. 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/QZTB92421939.