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 0x2edc8e03a97486ae3dfda465f14a59073175350bcb0faf2a6c0be19874cc372e. 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/0faba50a-1556-4617-94c0-311e030927bf.json and https://artists.proofprofile.net/proofs/artist/0faba50a-1556-4617-94c0-311e030927bf.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 0x58cf982712d26f87aac8f34f4a94f2ad018cea48a906c6a6f71dc77953ec92d8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEZC62340949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64079f0c1b56f2cf8622467ea2202d8ce58f59ff9cd0b85edf625bf9e28c6808. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEZC62359622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9954d046d5368e35d182c2df2491b1602a97b92e1f1d0c70b7a297538dfa6d1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62341048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198cb717b0268e92ff7f1271f93d2ab0ab6f7c6edcd5bbc7be94885d837f127. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEZC62359624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ec4c010e7f6657f521334ba40a30d4ed75c66cdd8c3453291c70dc98050876. 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/DEZC62359627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563da8f442a6f453e6306af89a3c979d0b61f913d6525ba9e07fc10a29021547. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62359628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b980162c8c6a761c6fc8836c8a5ef34cfcbc1d47e7e1dcdfd2a645fc36d50a. 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/DEZC62340952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f93381c3db4973deebd3e9f44ca01d013309e9b0a4145ea17fcbe73bc146a52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB42364883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7c9ba1d175878b3ff432de7894878b882ae302eadbb54d8b37b3c9d258436. 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/QM3DF2215311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70dd2c85afe029193979c1bf283a094aaec78c93b9ba74974f497688be0ae7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBRKQ2313431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9954d046d5368e35d182c2df2491b1602a97b92e1f1d0c70b7a297538dfa6d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62341048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7b409f02f4328810436be97ed538f69af2bd230fb6cb54aed5309f00357c29. 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/USANG2292945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c7c1a9202ead3c698d0c1f0fc3183442a4649f5ef24d1409ac4038200d230a. 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/USANG2254928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb237d24fc02a3f5e5188e8a70d3b8c893996ef31f057dc7eb186c2a549abaf50. 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/USANG2254929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a88c0caf90b945bafe190c72fee93254a8acea0719719f018e6452b5756f25d. 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/USANG2254931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fb8f5d453a0d29533a399874e962b2f570f64a5dd3a18d455a61433b1b61b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2254932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb19673b19d264cca2fb3872fc489d0e682e640ad258eb04e76ddd7c71f25a21. 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/USANG2254930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c7c1a9202ead3c698d0c1f0fc3183442a4649f5ef24d1409ac4038200d230a. 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/USANG2254928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed51104836d4207a597e89c1dcca2cd4f6070038c4ba3e4ca92dd879ddd238. 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/USANG2254927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ee6a91d79d8b5b46e2284eeb1fe0dfd9407c3680cbbe569b61895aaad5933. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USANG2249619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82601cdbbf30232d88421259f0cdb0a82a287e9a2433f52f8003585a3002d7c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2250192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f33ea1e2bb76b32dfc46b47c465ed6b35771a6c726115302cf85da8b8c4e43. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTB22210178.