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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2787105b62c9be6dc7a55859de08ca8aff3fe043b7ee6899ca243f12eefded. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84f3ae79-9322-487f-85e9-9879ec87461f.json and https://artists.proofprofile.net/proofs/artist/84f3ae79-9322-487f-85e9-9879ec87461f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af2acaa76df53d502e1838cf05b5e3f5f5a59f919cdbf5cbaaf3fa694d6a707. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZFYW2073308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441109b290bc660e9f81d4bff8eb4717e8ba46a8cb9dee0e64f86aff6ac0edb8. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZFYW2073309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be217647537a65af67797a97fe04b50ecbbd2f24c249761a43bd387966d6f4a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYW2073311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c54147978e2a935998771d76c074c4cafe8a42cba83623d7f75cc1c85351bd1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72096055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa1eb98de26a086ea8ec11869dcfd127ffa72ac09574af2456b5b75bfba97dd. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:27:11Z), 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/QZDA52072353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95282c7e532a45e363e31abe0a5f98acef25048f2d49c2800d298a10e8a4aa. 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/QZDA52072354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043026669937c8f8d849035ede9fb9edfc33a33a86affeff57ed5173207b02b. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZDA52072355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96068244a67c9ac00933a9d3f44b8df195b86108d73d0e070118aab705619515. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:56Z), 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/QZDA52072356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5695f46aba0e7e956797c9ce65015488c3394f29b2b7557c2776bab2b15052. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA52072357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d798bc87ef9b2d5480868abfbbfa7b35701a072ce45edf0c71a7e9a4839411. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES62037215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff37c1fbc75cf3b4c7db5227eb6b997aa58fbc89f4c1ea9d0a6d02ea67d283aa. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZES62037216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb38f1a670a5be64598ec5b385cbf87a2cf5316c2ca6e42bc51bc3f1bdff622. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:49:08Z), 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/QZHN52040200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f94fcc4316bfb7ef39cf175de0570e99513876639b40bd35d41c2c1e0bb409. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:51Z), 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/QZK6Q2036760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c125972ca87d37593cf72681b6c1279b81285162f5482126912466477a97bb. 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/QZK6N2025756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58426016046807e25690070e2d69c0a32d7815b009534fb3044edbe4b6bbb0a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6L2037148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bcd0aaabab3290ddb0afd580233667b6b5d19c1486a3ba901ea17e1a5d3ab5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6J2012584.