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 0xd885a3c9ea7ac22a117b0dfa683c929ba4b5ed7a137d5309a1deee913e955537. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9bcea22-cb55-48fd-96cb-f7a59801c830.json and https://artists.proofprofile.net/proofs/artist/c9bcea22-cb55-48fd-96cb-f7a59801c830.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 0x370c687cee816788aa2fb71a7f9c403522441aad0f9544fa16579c7c3f2b4bd0. 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/QZDQH2380967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd87d4b5050aeef3a9fd333916b7da02d52961a744296362d7ed3868b4b5f92a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:24Z), 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/QZDQH2380968.
En Vivo desde Kollas 2007 Vol.2 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8117486c6369c716841f6c7f7ab0d2803a685d21caba33a45bfd1aad3c3f6eb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:21Z), 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/QZDQH2381091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263afa9be0aa76a91fb853d456c06f3e1187d3fcda9c40a493ff183868d51806. 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/QZDQH2381092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732607b9e0172d77c8ca2eb6eeb69c93cdf1374bb1c4926747007a350f5bb0b9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:31Z), 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/QZDQH2381095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbb7bd538678b9d3afd4f08bea29232650599cbb1c8945e7a1b002da5705e0. 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/QZDQH2381096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b672a59443a881a14020ce8802612d2225c029dd7f55399df0589c7a706cb. 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/QZDQH2381099.