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 0xb6445837ffbe4e02e6530baf504f318a4911dd3b2960dcb6cfec5a7de0140ba5. 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/6957b888-bfde-4ebd-bc0c-570b6b2c77d3.json and https://artists.proofprofile.net/proofs/artist/6957b888-bfde-4ebd-bc0c-570b6b2c77d3.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 0x16ac2460f516b81bd9b2d6d4adad0fc7d281db34e0652fd96663a8d4589c53b1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRX202142937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a154ad9160d740663cc446c8b6d007f9452621f06a2323ab5e3eb9cf1019a0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRX202142938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c22416626b1098d4adc0d33193f6e9b7b7acb6876e34288ea667f9ed51cb7. 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/FRX202118984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03cf7bc008998759395ab67d60c091f4803ccac57f2b52bb164c2c7e8117837. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR0Z50105894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de58e0e26514485a510889fcc2d8849913b038eba5080a13f5aa468c33af3f6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR0Z50105893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e0398c4e6cda822b9c60ebf2f381e8a04aacb799b7bcba1782261d420e3db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282040453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81750634ffc33d9d88cc9dbe0b27dcdc7932f52fcc38546ab48919e7b520250. 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/FR0Z50105887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7788a78cf0ced88364281162f70a5bd317afb23038383268967e2a537e81526. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX282165438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090a0a3f658c138314c2c79eb6e2bed91c95535488bcef33d38166e958a59d7. 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/FR0Z50105919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0d9f15ca8b530bd73caa22520c126d3476395efd26c8cdbdb920246417bcb. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR0Z50105892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ddb810b216ade46545e483f44c7d1161d1d2f82943ce4da7923d206dc903f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR0Z50098666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34b15a5344f51363d012074ea321720c97c3eb5257eae4e2e846e9138517fec. 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/FR0Z50105890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a0d9db649a8ce9017a105d5c8c63229d8b966eb7d4582eccd6c618d0112bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR0Z50093154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163ff143a5388f874ce0686fb026adee2c43ef42f111b67740f5c0855ccd68ef. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR0Z50100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54cd320638d6b2b7ba792161a996895fc12e2311a40c6df50b1c5454141fe9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FR7PE2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa16270380991fa29aed8c09c9d6e28ed7ea45606a63bc200865d2d209e57da. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR0Z50112883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1cd6b5e93ed1df7c95536f016d44552cb3ed2bedb07211bb62534f48cca01. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/FR0Z50112884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f724838e1626d9b1b07cc0d15a15247482688a883fde4816a6832e51965909. 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/FR0Z50112885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1752bf89935198c31d8201db0f8de4c33c7d7794cd9699c44610cd04e9dbf064. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR0Z50112886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adaa7435bf858e50048d1cdfd5cfbe61325b138e447bfc3668964b4b625d536. 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/FR0Z50114497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ce6808cdbff9d0542c14ff2f24172824da95d6ad7328e1ee452bf537542e3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR0Z50115979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bdcc0a3dbf5e7fc59399cf32fdf47618c4e3ae445ffc9293892b23ca59704c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR0Z50118383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91f541d87e6596e2591083bdf058e038850f083b70a36f1a3e94dd486982f1. 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/FR0Z50124472.