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 0x5056c3ffe4a294c6c2ff2ab4746bd7cba85ee1ef9c9ccc42669f373bc64fbd1d. 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/2ced7993-2ee6-4a53-81e3-3891325ded3a.json and https://artists.proofprofile.net/proofs/artist/2ced7993-2ee6-4a53-81e3-3891325ded3a.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 0x50337ae479d1649900f18d968ae3a722181df4e996cb645b68c2040754a8266d. 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/USXG91900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78268fafac6d875f1c03c7540bf1bd9cbeb01abb12d88ca3f9184d5f5bf2419. 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/USXG91900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f68174d9a1c3026b88655337aabe4d63d01cd59c4ce985a53fd9c85e13e202. 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/USXG91900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf58e8601e1458efa89252ce995afa95eadedcd9bf84089ee6e8420864e271f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GB72R2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8d9b0314eeaf1dc555eecdab870b71f24cdad2bd5fad98d4c9db805c40e42e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/UKR6V2073897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa88602e537ec64355389c9ce7632e43b3f63ef2f22c15ac134664de4dd3c655. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USXG92200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf812877716496c01ba9ddef5b6fc36ab436231df11362896dbe152bd90b36767. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWMY2300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647ba291d05da050f5cfd09f3e0219dc3325660fc5dca88e2b850752bc3f04f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US78L2425909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4722f670c2ba021c883824415701802d9ea7237a5616e904bce3311514d7f49d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWMY2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb134bbf4c49bca6feed3ec6e507249154bb9ee23d5b37593b942ae6cfd07f9b. 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/GBWMY2401820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b07e97ba761c275baf644b456159051ab48ba3067906d6fecb80f616fb9bf58. 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/GBWMY2402240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3f4c149748b68e9913adca307b508b7791d3b88482cfe0397497023926b58. 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/GBWMY2402250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197739ad49f871af8f5b360ebc8004c59c89222727a43ab6432705aa95cfcf8e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBWMY2402235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b6299e47cd0a9ff01e1f2f6dc00fbb39b7cf098b551edb8a3efdf555016a12. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USXG92400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cb1e2fc981f65708add81ada335d4d8956692f560ebf8ed566ecb123e72050. 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/QM24S2008148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d138c5833dc65a1a17b70c1bebf8b5e5aaf276ad850041285ee08d140b7a9. 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/BEDV42000004.