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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879fc53dabc54037410b7d7e16f14ea4db44cebd13571b17c7965707977871a. 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/66499931-bf50-43bd-b904-66219e278914.json and https://artists.proofprofile.net/proofs/artist/66499931-bf50-43bd-b904-66219e278914.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En Vivo Con Servando ZL, Vol. 2 (En vivo)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c543975b8a7145673030424436e7b33f9a7e95bcc726bfa16c56778f1fdbbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32391578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b920e5f5117b1b9c8ea6ace5971160a52d69fa728ec452cab99615077bf7a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWT2323919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f4fd190e09adce2a91747e2fe1718050ad013bc8239168ee6beca5837ee8b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWT2323921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759b5304390f2a0e0f006cd8e55cba82edab811eeb9cb7ad744304c478a2be2a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWT2323923.
Los caballero de durango en vivo (En vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b3b22e6bc1519ba18a1a2b94d867c1a0af65d3e260dc5d09a8c8fc523fcac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2271006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cb5715f4ad0646d64d54f2725251ef4d862ffc5243c4c83fbce3be8d32bcae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES72241395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce384ac801c2e4b33a63653bab45448f142c2ca7be1cba91a6b2c66bd51f9d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES72241396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffea11daa3d50ccb8971afe15fa49013eb3b297d03ab7dd1324ccd235ea7184. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWY2050437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3f06460b8c67578911b4a180a9d130ba2e585166cf3383428c2cbc6cc2e591. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWW2015255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81364883ea139f1c46061e12bcd4c8363b69ef2375e64733bf0aa69f14d17ce. 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/QZK6M2433619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f83820af796a53a764e2d10b1cb176ae27a7f3458da91782b8a90fa25d78e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFH2398897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ca977d0b0b2cf9dc5db756f2091a9ac1fe5222e7ee656d4518a5cd9723001. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFH2398898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1528da0ae1f29a15065a7ece0f2e37de29790f5476f0c845038b0122ae384412. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6H2256502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb735105b0d2251e2d6a114420fbab97c8bf396a2e97db232ee37e958aa41049. 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/TCAGN2212231.