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 0x2940133e4702e4017c2b7bede188982f9f3c9a7dc1b4dd5c39e2ab0594a79a23. 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/751cf282-302e-4689-90f5-c081616bf5ea.json and https://artists.proofprofile.net/proofs/artist/751cf282-302e-4689-90f5-c081616bf5ea.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 0x76ac4e927b73272fb67cfaa5a30fe044dd01fffe6783ec167941cab9426f63f9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CA5KR2299829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dbf318acc9f5211da02ab69fcabc09b3cfd6c58725aebd8e48bcfa2dd12d05. 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/CA5KR2305595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa834fdbe401f371bf3609baaa0a4748fe18392f528db15dbb6267129ba8ecb2f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CA5KR2305799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd95b7f1b8ba16b85a403e301f38bbe9c9acee61ff20b989eab03f9054a445b. 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/CA5KR2297687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a86bb3a5b9f117615a438a81074cd2a3d8ad449d022d86af6569e9ddc8da8ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2305800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac4e927b73272fb67cfaa5a30fe044dd01fffe6783ec167941cab9426f63f9. 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/CA5KR2299829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388129147f76ab76a9bd2219b20d80364686b47c65d73da2da0f399e45233bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2305801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45de0c85ff2a8b6eb8c1cc221348fdeee9d8c75782abbf250aa0f9ec25a1c181. 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/CA5KR2305802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9122318511118519e97025564bc1c233221186c6b7fe8f8a8016b6389bb61499. 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/CA5KR2302680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa5089350ffb54cf9d7f2cdd8db32bf83e804b578971186568c3783f55adea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2305803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b02e9694f9a77da2fca515a7d875ab7ff79520a1b9472a2964b7d8056d923e1. 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/CA5KR2448699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1222fc3507cc44a71c9f84c217f31c795dff0409e006fd394290c22cdbb43f8a. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/CA5KR2457092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077b078e39d5fb5773048f05b24660170cb0a6e1590d4a10fd4b6f71ffdf012. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/CA5KR2473466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396e537b0c1833a00c980627ff7bdd6389b9d487368cfe62f0cff39aabf55e63. 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/QZNWV2294422.