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 0x462ab884a067ded723de5236f4ce7b52b47bb1eb4bccd38f57bad5045e6dceaa. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c2070de-c824-4161-9722-5b761fc69d07.json and https://artists.proofprofile.net/proofs/artist/1c2070de-c824-4161-9722-5b761fc69d07.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 0xaf956ee922fd3bbbcce699c5d650d6875c19a42f2887ce1657a209f621a5db50. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5590601259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca912fd6eca2a2111bbb01ed3d4a9aea1ecb66eacc88dfa5b042ad98334d1378. 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/ES5590601260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718d8d55ceb737d74010610ca31ca96c7379bcda50fb2266295967dfceec7d50. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5590601261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ed47eddfdc572ae36800cc3d867504a1a4341b198e5dc28118018f65855db2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5590601264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef40c1be8191a206463146363ab92424ba2aec808893cb36e3bd2fbc6d06ea. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5590601267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e011298507c2e07eb2b036d4150d6dfc6b6e2e57f80bf40321c151861e7aa17. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5590601268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246f54e19408c31afaa4a09443dc628ae7242840849ab4374908f4bef46eb779. 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/ES5590601247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3142aa67c548a009d531c53d4816704e0d3827608e668c8b948d763e599bf9. 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/ES5590601248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4210078829c259cff5e7c04f5c07152c6651da2997c668981c67e5f0755696. 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/ES5590601249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e41d578330763799d70b8388db6b6ab6e91a7ba16b2934cf82206445b89241. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES5590601250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cdb3fb12e5aca69617b30e48a3f254a0cee54519f6ab5d4da079f3bc830052. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5590601251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5701e13bc424ad45262cacf642e0656bbca37944076571d00d02e2aedea401f2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5590601252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1710a1dc9329e66c425717b8466e45ef97be522e7660f30f23ce253fa0f0aa5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5590601255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60f7576504ea5789eb7d501c7be0a3779f702c7e5bda3081fdda28e4ecc79e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5590601256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb0b53e0e8ed852bc63b38ec468a8afb9cc2d40a449d07958d862da588d5951. 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/ES5590601233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efbe7a6075364fdde4772f493294b3578672e1a2b5af7389fe95bb2d1409f24. 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/ES5590601234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af222676ceda761d323ac634aaa236188a1d68031bda71fad3371ed2d6eda7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5590601235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaa38375a0a53672f724b8bbf1249af0e48f6ab1b60c0186b17f7f000bb5941. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES5590601237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1906bf1cd97542d1cf99f1119d44ef8a46bf22eea071f36828bcc8679a958d. 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/ES5590601238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cb7a468a34941d166f8336ac0a1268e9562ce565fbaae77bc6e64d7487c1d7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5590601239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe795749190e7c1d935e44f3e961a5bb981275df28b2eac841cc480bf00a4253c. 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/ES5590601241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f586880e4794eac4e8f4d2f8f712fc10b836cc375093008fbe0b53bdb319ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5590601243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c203f56a06a556004b564ffe8589db19db4804e5916e3b00ee692c476a766. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5590601245.