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 0x679a5ab0ed0119359fff8f57f2c388b87dce2b6dc32cf5be255d21a0fca462e2. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31154b48-cc34-463d-acbe-f9f60d745546.json and https://artists.proofprofile.net/proofs/artist/31154b48-cc34-463d-acbe-f9f60d745546.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 0x33b6159fa3651e93281a4dc7155679f29d895b97837da5805f092050b16f1760. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ7S2411585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e0eee958df17fbd96d959c5610f609a7d374e72b5fe489a1b1f63329ddabd8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7S2411586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd1abb24f6663c471078f7253ced2656165393a8bbfa9ddf2ebd9e0af5326c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2411587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739c1d53b01c0121942e3185967e8a26fa95f8261e3372a2cfa21d41219b3434. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ7S2411588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06b2a1680b0c5638266b49c311f90245faae1d5fad4d1e05c69e82d8e5aceb9. 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/QZZ7S2411589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ff4606317d56f85951b0fcad4ac0e948e6b2485006d39ce59ef275a026b23. 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/QZZ7S2411590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1548d539ba97e952dca42207a8f046b83c6f24fbd3efb96755e27ce019796ec. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7S2411591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3010eaae678cd7f420acd3049cfacac52ae59ae69d0427aeb156ff60c9d7c8d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:14Z), 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/QZZ7S2411592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e89ee38e27f900d8a43e65182d3c36d4506ece91e0f103c876968c01202cc7a. 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/QZZ7S2411593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d66eae0b0eb7362e33f0352190028b978b63840d17d6caf14d82a476f798c82. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7S2411594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db02f54f460ed0f0bf95f414055bfa87324139b78abc5b73ef096f65c703df. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7S2411595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d98a06c6f218e2ccb519606fd0547c96ddb06edea2b142a7123047c7ccd792. 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/QZZ7S2411596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfbbff786b51f66bf93da6f9b0be20fcceb8fd177d7cdee12131d4c1f8904f8. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7S2411597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b348c47cffd1f5e839f531c3174dc3d7a359ea9acfb734602bec18c2daed6d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7S2411598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa420723c4edaa15b8c6e49b261ba8bdedc45233f6b251ddc0fe9a8e57098286d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:01Z), 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/QZZ7S2411599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b0a182ffa8b8a121835fcbb78ac5ba1a25a1cd59119afc8a43e943f854ec26. 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/QZZ7S2411602.