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 0xc9ca03c1061bedacdf620dcfd9c5b84aca2f825971e47a3906c09b78fe89486e. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08a1978e-41e4-47d2-8f84-a3fa98f92d5f.json and https://artists.proofprofile.net/proofs/artist/08a1978e-41e4-47d2-8f84-a3fa98f92d5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dj's Fury & Jordan-C - 23rd February 2019 (Pt. 01)
Dj Ian Van Dahl & Yannis - 23rd February 2019 (Pt. 02)
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 0xf72cc50aabb21355c27296b2a4431f229ed0e0bbc2b588e575021ec6dec96d34. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5FN2200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61924db14502bed79ea0c00664655c19ede0d016547445ab1e6506005b2750. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:56:42Z), 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/QZ5FN2200820.
Dj Yannis-G & Danny-W - 23rd February 2019 (Pt. 03)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb187d9095abd776b693bc0514db90c813651e672837a4bae2c2bab38604290bc. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZ5FN2202724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e58e1ba4fd2d786be213255e569747062f74f0c0f83c8f1440d1cb9e1f1ed7e. 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/QZ5FN2202728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7f7c259a4eaa45980f90cae03435d620e72588881357de4177645a28d0af7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ5FN2202729.
Dj 's Alert & Fergie - 23rd February 2019 (Pt. 04)