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 0x32797a145881aa0c536c1365a8c44d38ca007f9f12aeb276b711eddca59a185d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b271134-c5c9-49e5-8eb8-fdb6bda8bde8.json and https://artists.proofprofile.net/proofs/artist/9b271134-c5c9-49e5-8eb8-fdb6bda8bde8.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 0x732688224a52beae2f3c84c0650fe260fb993877423b4010ef312442d1b75d63. 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/FR6V82080286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5a484650997182a79123691c1841ffaf50df15186b06ca957e1c0af8c6e80e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR6V82080291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e479ff09fc379f71b2ceb82cf2d6c62954e5396f01df4ba60a7a7853a17cc2e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR6V82080296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e6b67ff2200c0b3d51e34209d1294d2e251a5255abd93c54911bacafd8a85f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:35:31Z), 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/FR6V82080297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a269c3dc8a276e0c79d783223f39d3e73d2b7e39de2469a64d9320de24216e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FR6V82080298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e209f07ad2c7648650b570433a3ee830bf48ce6cf6d69724979fe781dee564. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FR6V82080301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6e3362ec50d34434b25186987c1436b256df30762069c162a6af034a9dc184. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:05Z), 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/FR6V82080302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884b0b62fa052ffab5b23dc302f3aacc4c739f6ddd946ea52c61e602cac3e4f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V82080303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17549d50e394c2baa5f5003eb6d003fb5457fa60aaaf69b29782555eeb17900. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR6V82080306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4585afe74907b9013c64f28a5af7e2d6d4fec9aaf24679d50cd768ceba199d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR6V82080309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01b2e35065e67ab1a90b4b091ba1ba0a8db8356261f536f8e57b368d057f65. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR6V82080310.