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 0xe8571d58b616eba4854266bbf07841dd2e612ef4a56bee4a70a87d16e2559ae3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecfb8764-482f-46fc-aa14-301b06ffddbf.json and https://artists.proofprofile.net/proofs/artist/ecfb8764-482f-46fc-aa14-301b06ffddbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ponchielli: Dance of the hours - La Gioconda - Dance of the hours
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 0x475c988ea2cfe4d0cd0f67e03365980815fb86ab7c2c10fea2231db1a6f7e9b1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ITI232000317.
Mozart: Rondò alla turca - Rondò Alla Turca - Sonata N°11, 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db54e365784ffbf589ef4c9522f63f99411abb605a07caa2e4d69549bf4a03. 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/ITI232000318.
Bach: Siciliano - Sonata N°2 BWV 1031 Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb4b70b47385fd0240db33ab8d09da8b68adddcd38da2e8d250caec145cb7e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:25Z), 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/ITI232000320.
Mahler : Titan - Symphony no. 1 in D minor 3° mov Titan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74edaa900d972aa5486e451cb97635e548b2f551e0b79fbc8783e6ea1e0838b7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:08Z), 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/ITI232000321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09be3c3b693b65cdc41e62331d563d663861dfa8ac2e547b9e339022bfdef402. 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/ITI232000322.
Beethoven : Pathetique - Sonata no. 8 Op13 in C minor Adagio Cantabile: Pathetique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29098b980c1325969147db2e53b6cb3b1efbbc43d2a9a58194dda8701a12113. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/ITI232000323.
Beethoven : Moonlight sonata - Moonlight sonata Op.27 no. 2 1° mov.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a67c5d44f4c02629094aefdbe0cffd209869ab459b7092369f6bc50ba285d2b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ITI232000324.
Bizet : Carmen preludio - Carmen Ode: Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d243bad7f629ec3999640658682ad0742f6f6fdabe73acb52f4689a092d575e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITI232000325.
C.P.E. Bach : Solfeggietto - Solfeggietto - WQ 117 1H 220
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee578ae13f3b51c712bd5975ea2db5bfa52768ccfe9fbaf2a57a7e3248b9bc. 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/ITI232000326.
B. Marcello : Concerto per oboe - Concerto per oboe in D min BWV 1059: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fe328942a94e1e07b5da3453fcff3ab80095c5f49cf683d4eec0d9534ec7ef. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ITI232000327.
Bach : Jesu joy - Cantata BWV 147 Jesu joy of man's desiring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b1e95d1b7573e3ac66abd93c3fb48ed1f936831289e5098a4f45e6b343ab3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITI232000328.