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 0xe3ad5835d2705d7ab2f5b3d0ac42f3f64d970ed252c40d3baf383e8339f92f03. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27c22de7-5d49-4d24-894a-1a19e2f32290.json and https://artists.proofprofile.net/proofs/artist/27c22de7-5d49-4d24-894a-1a19e2f32290.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 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 0x4b1778612a90ec062d51954550e24c63a968f0a8ac514b75a06e4a43ffd33401. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH6541893722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e325863b816b5ab768803714d866f099966e1a4db3e3cc02d1ed1de4570cf9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542136843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655189351eb6a7ce0df11d6c8fd62b810185e5caf04480f735a6b445529969e5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH6542136877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b99a5e7fcaf9b1494a20a261deb52b3130861ebc72fb42f9cb0f7374c5a9ca1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542136880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47dd4e583d98d06838ea6fbdcafcc32fa51323c3f2972e832354c910dfe595. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542136889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0239b02e7c7c13da690838cec009e5726db5a101f755055496deaa43f9da9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542136909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06136c98bf34d580e0f501751ab82f927b92a039fc3c2119494a295380c3f72. 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/CH6542136932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5568eb17efc50515fda0d426899db730da1d980d3d404350605d08f9780a29e. 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/CH6542136935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9441d69acc372ac2cc5ff1ea10ef74f9a749a7b701595adc8f5bff4b2b68d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH6542368481.
Jesus Bleibet Meine Freude Dalla Cantata Bwv 147 (Trumpet Version)
Carne cruda squarciata dal suono di tromba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64299159bfac76d80b7ddadb4faf220658e144e19f697872e1b48cf3e1d6cca8. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/CH6542414733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc869afd978653e71b02f5a4fe77fe92e1908dc6128018e0984ae90b64785ecaa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH6542414731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca982f67051762b2d6529f3c1fd22068ac76bebdac9d1ecf7cd2f1994ad56e8. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/CH6542414732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b07a2ed3c6c7cc9a0f3745a693e0aa4c57ecaefd8a64caf5561d08a46fb3a. 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/CH6542433355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609a3ae6b18fab1f79b87c28491220e99fca965052954c95468992539870c12. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CH6542433358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e504e0414306d8e69d6cf893e04e6e11f04e3f2397135af06f6e6e7b8fa0f6c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CH6542473628.