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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 0xa249964682f0cb2433c5e4673c6ea2ca1549947ffef6bfca5cb505a42a2fb553. 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/6b1431f6-f9bb-4203-a2bf-0ff51dfe541f.json and https://artists.proofprofile.net/proofs/artist/6b1431f6-f9bb-4203-a2bf-0ff51dfe541f.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 0x45900987d55ef6005d6f73ced3446a1f4e4e2c21c1f8c39c78cbd877aea1d4dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6b26468f71aa4af94ae660ed3d04c177d14ffce9bd99121f71db8e1cf52a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c23ba5319882d1958e1aba377de6ab387db127aec39a050854db61b1592b618. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee6dc7836f0a8a1349f3966d5bdce4fec09e32056581eae2ff342dfd1484fd5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677708bae6858763399b4ee6b26ab0e323c278933358dc95032cc8477215ba53. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ebb239b820728a03d2fdd44dc57d5f4282076b16cd2f6bf7b85e610e1bc43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2100591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c619c55bd0423bce45a5b9be4c7c2dbb80a5e855706699e5a34a2d959df13b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3d31a093669b9ef984303fcb52e1627c369197e76039527fc7c3937c995b1. 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/NLT2H2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b453ad724cde9a50af7d119eb65318d89a0d559301a83e6910323ec4d4cb36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a089414bdc8706d8e20cbce16dfbccc9a1516f9a03362233a0bb4c162be150. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb24ed8b59a8935eb1837a5af9ea002aeda1eb8a319628e16fcc833812e4e64. 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/GBSMU7521760.
Don't Want This Night to End (feat. Nate Vandeusen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e287200e881d6cbe7b81534f8c679a5d3eca5a683f38c4d820f61427d6c38. 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/QMFME1941162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bab52f5846b98ccf03062d000f5482b6d1777b721f53682ca3e26d216e95c49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02252da3b616c4bcb4e379303868e339c34956381fb717ee2161a80523829c4b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40384168b7ee70252e4c846edbe0636c1734bdcc304a7dbe69ca23cd5cfc34ab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef2384b69d002e790f4c84b90a6b57250dc3725e35030cf12b6099f200f84eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6895872691d7f7d743a640f8692f189f7f4a443265ecbac33e266d9361e0c600. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300321.