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 0xf8462687b131ec3b011b8f81d876f7eeefaacdce6e5593cbb968cbb995cdf500. 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/099a2466-b782-4a4b-86fd-5078aa429518.json and https://artists.proofprofile.net/proofs/artist/099a2466-b782-4a4b-86fd-5078aa429518.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 0x157d5d2fa6d2a88ac6f0ec66467bd5f4b61707146807498061bd23da8b642eb2. 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/FRX202130668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d1b559a371e17f734ad2bf89a1b3fa74f97b7ae46e7dedae0aea2dca6f92eb. 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/FRX282106497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab68af9cf8823eae9374c719fc87e732bf20407e298688c4c933c0d037c30c2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282106495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9978e6e99ab8e0b5c67f8707b285bed8b11c608ab71453c81ba3fbe272cabc07. 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/FR10S2128311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c9e3fc48d428feea07790b687a7dc30915d7fda6fa0390e4cfc6d702d6392. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR59R2166165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2068045fbf87492eeb9cc685fdca74f726b4854fbf48f710a25a36e350567e94. 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/FR26V2081533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604b1cb70ec96619ef15914ef83cecb399138925fccb7a3cfae42f86343a5edd. 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/FRX872025515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd174d37887ab7085d55c2f315c9b3def11028983474f4ad4d8861e1a61c358. 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/DEUM72406627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e921f83c6ec22bf5b2e58c8c2e1257da4cc99df30d4750cc4017f11c12bf8eb. 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/DEUM72312244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989d3c3b616e37113ee6c4297d48f36a92af4a014ea368f67f6938d1c86e0002. 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/DEUM72300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa38d5e1b95fedf21026ad76e42c6adf477a4393f01cd5226705ce8f7df591c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUM72207057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926400e109237a4d07b324b558fb5fe66f131710727cd6cac7cdaa4d87f68357. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUM72202857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b9e5eff8066b06bbd4babf5d0fdc76627c82661bad25504d1bc0bc06aa880. 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/DEUM72202311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21311c446db9747f972baabad002cc70af6b0555e26e02ebd414c2d8968fb919. 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/DEUM72201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23632e6dd82c4a547e99220ae1d6608f5d0e7e232e9c5e0b12cd3570827e7ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL4NL2145820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b27ce32176d5694064b662f69e843aa3d1ba4eae7a5972517b3deb03c287b56. 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/DEUM72002818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb90c322373860301b33b6796e808cf3b098ead627a3c92348837be9a5e99e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUM71905787.