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 0x1b8758bf654a4cfe909d3accefa4856a2fd1f85fcaad54b4665c65bd0096f6fc. 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/3acc68b9-4f52-4140-ab92-71054f06923f.json and https://artists.proofprofile.net/proofs/artist/3acc68b9-4f52-4140-ab92-71054f06923f.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 0xe71f611c33da0f42e98daefb2ff455839a826dbfd70e432b0272c39a7f5d8d24. 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/QZAKB2405982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f724bbfc0d57f211e1503bafb6b0a2bc616c63127b046be566e4a2ac9810fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAKB2406839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec0372919711b8cf89ce1aa8e3865a33045f39e08633eee9edbaf75a187193. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAKB2413788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246f320c167f2ec3cd0051dfd33f154ec96a3e68f1566d3fcfa995de438a462a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZAKB2415644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8d83f03d7d4050fa0ede753d5322d9898daf881407c91444a569f7c703127. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:04:14Z), 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/QZAKB2419294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c0ee735400b026eac85e5eef135965525c60fc712fe1687888328797a100b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:15Z), 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/QZAKB2430655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43f8045dfe557d8a5a15ec167532e0789d55548b4e6e5b177ed0a2ca7236d1. 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/QZAKB2437649.