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 0xd67b49a00973a4b1224f075fd4b763dad102746134ca7a15f44a21f98933f390. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63b47d01-9a0c-416a-86cd-eaf7fb4cf5ec.json and https://artists.proofprofile.net/proofs/artist/63b47d01-9a0c-416a-86cd-eaf7fb4cf5ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Angelus (Winners - Paganini International Guitar Competition - Parma 2019 - 1st Prize)
Re-Birds da un frammento di J. P. Rameau
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 0x059cccccc1474c8ba28481c3c003dbfe44e2f2dbabf870410ea0c15bd5269aee. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:38Z), 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/DES382457003.
Ida Presti: Complete Solo Guitar Music (World Premiere Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d917ced64c9572ede2c8c57f18f648c3ae56b2d3026aa890230d1c8a158b986. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITTA12102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec21218f78e1bd77610f501f6ca322c76c4bb4ea6d106ac13aeaf8e6b5d11ad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITTA12102012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e47f6c375e858f51fb78a320abedfee60188535bd71e16f826aa629c028aa6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ITTA12102001.
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 0x747e47e385a7f134c2d6eebdccd249624c343cfe3742f6feb1f2b2b5aa7d6ea2. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ITTA12102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55a757740a7f5c52e896caa84fdfa439a2402b08f2378b2b4096c2a07bda39. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITTA12102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc6944c06b8b66df19c801200180f0be2cbe7059b968c3bb213da36019d0a54. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITTA12102006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a20cdfeed2b1c22b3dfe514afc5ada046e832cc147c04b36150caffc4dd61. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITTA12102007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8436ac0a094b3fc0d430c688fe27e39f85afd189f0aba93065419f01b1daa03d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITTA12102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c3119f7c30bb8513af9cd2abc6025b62f0d9cdc00fc0174a5ece4ea02cfe8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITTA12102015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ed0964e0aa835a0169e6035b96f7accf63cbe7a0b6a366ba65216b88efaa9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ITTA12102016.