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 0xf6261cecf373c05d6262cbf297b814026379eb8520f69e03bfb5766340fd85e7. 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/0e105486-0705-40c2-b72c-a44d26f7f1d6.json and https://artists.proofprofile.net/proofs/artist/0e105486-0705-40c2-b72c-a44d26f7f1d6.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 0x28021e9ef32ad2b389d27b3d07b8e253e0ce1f4f9b44124c9f9073c1d1740e78. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:14:26Z), 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/GBKPL2202577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec0fe175b0ad8addb3242c760eacdd8b414fc619e5da362229694b5a078dc8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM6N22440455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a210ecb3cd7b361d0b3e7ab4ca1fe48d48eb94645c37afc591ff4148e159e. 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/QMBZ92500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cdda7e1ff1a379615ad5392ec6b4e9d62b9e2997e3c427755edecb5e4ea6e8. 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/QMBZ92500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a210ecb3cd7b361d0b3e7ab4ca1fe48d48eb94645c37afc591ff4148e159e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBZ92500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a210ecb3cd7b361d0b3e7ab4ca1fe48d48eb94645c37afc591ff4148e159e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMBZ92500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181678363ccd6985ed7874d4c3e9109c7c258d1e384cb040e94529bc6a19756. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:15Z), 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/QMDA62534954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e72f1e671495b1a32ba3e0dcd9d0a376393496d1400fee2bada71a8b7538be0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QMDA72572028.