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 0x38fa1380af79cb4795a8398b81b4966d90eade01bf6a7d5856006c0e6e189166. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa1b6430-9fb9-4aa0-8373-264a04c13ec4.json and https://artists.proofprofile.net/proofs/artist/fa1b6430-9fb9-4aa0-8373-264a04c13ec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Argento: Letters From Composers / Vaughan Williams: Along the Field (Excerpts)
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 0xb9fada41b991d44451a682b4077f781529ba7db367731c790ec3ab412e2d2c03. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USA560586050.
Michaels, Patrice: La Vie Est Une Parade
Faure / Boulanger / Ravel / Debussy: Songs
Fauré / Boulanger / Ravel / Debussy: Songs
Divas Of Mozart's Day: Arias Written for Catarina Cavalieri, Nancy Storace & Others
St. Matthew Passion, BWV 244 - Part Two: "Petrus aber sass draussen im Palast"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d33dbb248e930f32196a4a46f8d511b6a43665654a1b22c99a3b5eefeac3d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF078740530.
Requiem in D Minor, K. 626: Introit. Requiem aeternam - Kyrie eleison
Mozart: Requiem / Ave Verum Corpus / Haydn: Te Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b37071b7343027195864a0b4cc787f9e2c3406fd7c47617fc65c7622551324. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI199793601.
Requiem in D Minor, K. 626: Sequence: VI. Lacrimosa dies illa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f547dab020089ba969d2bfcac7a8304b20b6e7655e419b8cb1a711b649d5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI199793607.
Music Inspired by "On the Basis of Sex" - A Night at the Opera with Ruth Bader Ginsburg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904214dc21a38057e7427265e3fa5dff992fdd3f36f2c095b4739d177b888df5. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USB8U1800453.
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