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 0x07f3d101809a58732d09bf5adfc804b806b1816f77b65b420d6ba48f55729013. 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/ef98d87a-1e92-4a0a-af49-c48cbf71bf7a.json and https://artists.proofprofile.net/proofs/artist/ef98d87a-1e92-4a0a-af49-c48cbf71bf7a.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 0x2d8494401a164a5bc315c316b301ed3a6f27315fe65cbade0f80ca963061795b. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:04Z), 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/FIOVR1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde901ccfa614cfd2df507e8c9d731853be540db45cd4ac28a1387f4135bb606. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FIOVR1700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b021c7086593b6b3e5cc2328212c9a9b6c1d5c560129c5fe82ada8db92e43d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIOVR2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204c9044b45113d1d9da17028dd3259bcf5faf2b91f20716935cbd085874fce. 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/FIOVR2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204c9044b45113d1d9da17028dd3259bcf5faf2b91f20716935cbd085874fce. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/FIOVR2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b021c7086593b6b3e5cc2328212c9a9b6c1d5c560129c5fe82ada8db92e43d. 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/FIOVR2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a49ed122800e3bc750163ecd32bdf2223bf9341d069ba97095e54438a33e26. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIOVR2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb260e0607344d4f7682a9372426eca10ab34f7e80800e0480f467d58dad9d8b0. 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/FIOVR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a9c6056bcb10570ce032ac145b3176279f5d2f128bf290b45e25c512bb1ec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:35Z), 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/FIOVR2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a50d174e410c2403df9f247b90b96dfa1b920e8abf0aa26c6ffc3412d3d60. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:40Z), 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/FIOVR2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c65f1744992d241a4af342a4ed442d9e651148403abd683e014bbffa2f9072. 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/FIOVR2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63e51afb9215998b1b152e3693a9074ed0c54b2cd2d00fcb8725de07113e67. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:44Z), 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/FIOVR2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc41893f6772f9fb59f0fb585d4a5b8202f92fee34bdae0127bfaed3d185fb7b. 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/FIOVR2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1ea6da84d1949ce1f1c226f00c038c60b61fe66646b3c255bba31a2f0836d. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:39:22Z), 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/FIOVR2400050.