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 0x5d3f8a81e8e0dd6a26a9d23db533496aff1f13d72b3da61213fc983ee70fd385. 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/882e3f8c-0991-490e-8f46-7fa04745eb84.json and https://artists.proofprofile.net/proofs/artist/882e3f8c-0991-490e-8f46-7fa04745eb84.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 0x2245243afc3ed8a7143bcac442525c8aab1c60b90b5775868ca983155c74bb5f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPJ591900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fc354a85de3c3fdbc676ef9d4e3afe6255ac84fd632091d4df6370995111a4. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPJ591900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fc354a85de3c3fdbc676ef9d4e3afe6255ac84fd632091d4df6370995111a4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPJ591900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec87354b94d3b764dd1ab74cb4ac785712e09c06d869798fa05957baa07915. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPJ591900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b1cd293eb749d26f6dd1da2b20cbcb8adf8575d610580c718dfcc6a628c482. 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/JPJ591901013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e0b54a147b13109bd5e975e12050577fbbbc2f351ae9feaf4dd4eb9bfd946b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPJ591901634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7491c972ecf868ebf053cbf006a477bcdac799dcb3f19f0ec8e6f47dde0213. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPJ591901635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcd2100b239225229b2b6df8e775cfd2b3724141d17efb42dac2f237d88cfed. 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/JPJ591901637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb3d6da30c61cc55e092a830894bdbd25d0d5add51466890fcf46222f4f15c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPD362100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56515cdfeb8ff21f23ee40e8fd1b3c644e1e7d45300354610c44e4e8178aae. 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/JPD362100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f328c79962b6e624659c894f098a881ce2560dd8dbd8160b6b0d3da3b05991. 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/JPD362100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dac65eae1ffef7b15277935310822b9049b61ea33ead46ebb0dd0121cd1c7a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPD362100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6276e0a8dedd1cfee877ac3bde3f1674eef734107f69d578b309db1a64e10d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPD362100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11437fde02fd710e2d4e1e7acc4b56721fefe7977ee15543dc62ddc55599da52. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/TCJPA2432880.