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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b71ca2319211e9f48bfc9418424ef34bb9c0527f0015e4067fe0d368b4b52a8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce974e6a-e755-40ad-8500-df4c31cbddc6.json and https://artists.proofprofile.net/proofs/artist/ce974e6a-e755-40ad-8500-df4c31cbddc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Undiscovered Music of Jasper Sawyer (Mixtape)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2fa5cbd46a93d3aff61d5f686c570621b6d390f58485be9d48f319ae64ed39. 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/QMPKX1509747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb193c8386fa50693f2273b5e497ebd93ad9356a0a67fe7e712bc131aa3d27c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QMPKX1509748.
Semi-Discovered Music of Jasper Sawyer (Mixtape)
Discovered Music of Jasper Sawyer (Mixtape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1751a358a558b08926ae974f8f257ee688f68af9ad60ab8828d490adc046c89. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKPL1822010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde76c7b26b29c7be3df0f0b9e8f8077a2c5adff7c6f8c8a319c717e3fb0ad835. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q1914602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39993a32eb5ad3ca06257aa9faac646fae64a2ca272ddfcfdb80e5fb8b0aaeb9. 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/QZHN52071167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6aa37c4527918771fe797e188c14489e1929239e288617aecbb02f84467446. 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/QZHN42178557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4f0700392b2636a70bef5dc4e60d743b9fb37b4c9a0412e9cb840a05c6bea. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN52246556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6aa37c4527918771fe797e188c14489e1929239e288617aecbb02f84467446. 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/QZHN42178557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3dccfe4e8e205c7b9dee4cf219b2f105a49bb80b1ba61298bac510ac81c820. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZPLS2330664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd30751abf91c1548579b919146b5578f6c606d726f8ada81307430833c6470. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA72416393.