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 0xbbd39b8f833895516fffb96b2fe7d1f259d569a7963d4264dc9eff81c9df31b1. 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/81d0b493-b58e-48ff-ba21-ec16686f94c2.json and https://artists.proofprofile.net/proofs/artist/81d0b493-b58e-48ff-ba21-ec16686f94c2.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 0xb9b8585493595ff7496536d87943dc50913f8e11d2e3dfe47b82c972319cd1d3. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/RUA1H2206858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3043d50af558e7f53fef19d18f9d169c651bf7de5046276b4b211698ab1679. 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/GB8KE2200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22ba043f4477ddfad67382fc40eb92cdb27b74e30c89527be78645dba45562c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2202851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acbaaec95608344aea6ee14079d2ed263de44df89edafaf01053a458c3590d9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:37Z), 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/AEA2M2250635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf795743bad91e1145b7edc33a78d94e322e509b355029be5a4804990944906f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2407988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640472c13729b7b29bca0b12a46d39a60903021c7eb11a73e50060f17478a893. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GB8KE2408460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0bba1da30e42fb3d29513ba27419c1ecb20975cbeab62bb5aebaa37d6e73bc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GB8KE2410822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379c70bea32814b191628bdc33906c383de815fc462f7079fd9d83932f5da17c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2411101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919ddb2a610a8f961410c5b93b0e54f305756293df654b7b6bfa48f0ecd849c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GB8KE2413171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb293ffeef390c84f3d3bd73de94accb0e411232acd6996248dfcd55769eb38d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:53Z), 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/GB8KE2413408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3510157d0596cd8463b48578b919d18c432cedafdb0083ae6e7af07327e5d8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2423126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0b6a247855dc29bd781051d94d3b3b7650a7a42abcb2e7cef04cfdb9ff220. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2423600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb639a24a897f9dd626b1547431f13f145e5f5aaf6daaff51aae60373c68ba9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB8KE2424460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cdb9c6d25b6d68debc3c8cf592f16b21d24f2847b9e283fc8e6a5f7db6c9dd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUAGT2554865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4385c59a4fbc8aa3718e9c861e7684c7082b3687ec9ab1f5062a077523f0ce3d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUAGT2581806.