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 0x26c70865a102e51607bfd14a0562f48ab98240f3abbe16f047c110f575b4cbd5. 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/6625a4d3-3531-46dc-98b8-5a333a2ea08a.json and https://artists.proofprofile.net/proofs/artist/6625a4d3-3531-46dc-98b8-5a333a2ea08a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
BEKFLUIT MEDLEY (a) UMFAAN (b) MAMA TEMBU'S WEDDING
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 0x13165fbbabc6d0c84bb6c2fa328e55323c1e28a2260b6fab279acfc7aa3edab4. 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/USA371107649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68633d6cd1a5087dbd30fdc52413d6e9040918a9fe6b397ee71f2e8b66e70126. 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/USA371107651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc33f2877a95f953a8531923107eaede4bb57911c7192a031a067a521c84e18. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:16Z), 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/QMFME1430986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211fd3bb5083954b483f169b32a87832248180fffe157c18b146612add49f3ac. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMFME1430990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65de0bf2cfa4b0ff8fc9f40ad1eb2bb9880ea6a02e6364db88ad096c5ff1655d. 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/QMFME1430991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de655d8d6955dddfcab6f115fc0e187eeb454d9a69de68c85e87e76e01c1530. 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/QMFME1430992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03f2cff6bec1cc1394f8e86ed72106ca8df8de011649623c47f94a9c00874c. 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/QM6MZ1477612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b7cbb93fab0908a020ccc422a690cc47db804d89f35ada7bd52593cc089ed6. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QMFME1559730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ddc2b65851ac98f5c96127319f9c789dc67b5fcca6cb5fd95f7fa003c2c34f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:15Z), 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/QMFME1559741.