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 0x181f2de3e8106a99962a622527b2a8c701e1d48f9fe375b581495bc390a71def. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ad9319-3c85-447f-b0e8-4c40789888b0.json and https://artists.proofprofile.net/proofs/artist/a4ad9319-3c85-447f-b0e8-4c40789888b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Javier Girotto - Luciano Biondini & Paolo Silvestri Ensemble
The Enja Heritage Collection: Terra Madre
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 0x776b461ea24a175c4c121c2dc522aa682869b8f6b00c22dee92aec31ea527cb8. 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/ITD000800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af90bdaa9f63d81d39bbc8c9dbbed1601267ad882514462be8489e95eaa0b9. 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/ITD000800307.
Javier Girotto Collection: 20 Selected Tracks
Colibrì (Pensiero musicale dai profumi e ritmi sudamericani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172a6b1f535bd222f7047f6352ebd897634a70c6a89cfb155efada799e610e41. 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/ITPDM2500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cb90aa4905194d6bc9586df0a32ef3e4c5e1d52c5b06486c05167d8961f8ee. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITPDM2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ead58fa24b6075aed81db8c2518e41ef9ebffefb47914dc3e2030bfe4379c7. 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/ITPDM2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63f3dfe92318048c6dc49b443c00e8cfd18d7922834054e0b2e34172f27085c. 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/ITPDM2500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fb19dedf6c33bff1b7a67744507fb6894d2accde0db3324f540bd0af88ac03. 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/ITPDM2500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b37b8f11d27ab2f9a49066cdf6d6a18dffe273997691a0fc0b1419adc0b530. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITPDM2500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d3701858f3b28d5b20ecf75bd9d6afa0c20e3eb2b212f60805e1ef8d2869b. 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/ITPDM2500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d743f23bf62fb9d7568955004f5890be2fad88d5783399fefff22f60d9b7a. 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/ITPDM2500096.