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 0xeb0459c1f71a441e6f3f281f722c292adb77e236e449124d855ca3af3dfd597b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c0c507a-757c-4300-9c7c-a124e629f84e.json and https://artists.proofprofile.net/proofs/artist/3c0c507a-757c-4300-9c7c-a124e629f84e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: I. Inside the Wave
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 0xbb9b4000fd38397cbdc49d1ef66cb616831d814ae5b634c0f5bcb0beece6f739. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DEN962000581.
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: II. The Death of Despair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc9a8896a8e59b07d2c3b18cec313472e793af1229d29e44920c935a2cac94. 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/DEN962000582.
Sonata in D Minor, Kk. 89: I. Allegro (Transcr. for Mandolin and Basso continuo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeddad17d66745ce3ecb35cb14e5af9fe6cf5261188761a561d7655a3cd83d80. 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/DEN962000601.
Sonata in D Minor, Kk. 89: II. Grave (Transcr. for Mandolin and Basso continuo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2215f0f6d5d71d90b2055645ef40a6a76837a85d61c79c305a52e417b4b1851. 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/DEN962000602.
Sonata for Flute or Violin No.5 in E minor, BWV 1034: III. Andante (Transcr. for Mandolin and Continuo by Avi Avital)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53663acc0258a349707f14433e69686cce8bce67d9ca8decb5f9356759fdf4d3. 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/DEN961101943.
Trio Sonata in C Major, RV 82: I. Allegro non molto (quasi andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828cb0a8c2524df8964a0740883c4a14eabfb26afb0a783c78866a37a93171c. 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/DEN961403431.
Trio Sonata in C Major, RV 82: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9ccbd84fb9a2f32826aa1762d605bf35e39c2bc5d2571628c1ddbc4efb0d9. 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/DEN961403432.
Trio Sonata in C Major, RV 82: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d40b29186250724cc2d1e34a95e187537356123019184ae15e001ee1e7f6fc3. 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/DEN961403433.
Mit Fried und Freud ich fahr dahin, BWV 382
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce186e17f0709e93937641683d167be47488245a182b3725296026b5c923b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEN961731303.
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: III. Death Is a Friend of Ours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e07417dcdc1f549d6d6625644c0fc7e2ff4e209faae70832e25e8d8371ba1a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962000583.
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
Sonata in D Minor, Kk. 89: III. Allegro (Transcr. for Mandolin and Basso continuo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e87d2026ecc260ca483fd4fd4c4b2ddc78c605174ed4c72c16f66439a0ebaa8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEN962000603.
Wär Gott nicht mit uns diese Zeit, BWV 257
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dbbaea842d4b1804defcbed509a4f00f1026a31046de5317cdb40899f0a85f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEN961731301.
Wo Gott der Herr nicht bei uns hält, BWV 258
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a0fa30b14e4c296a227a557cfd209893829051c1a51125a8e38bd833ef3b2c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN961731302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a2b212a1250efc1e99f48954b0934ecafd31dcf83b1763d73b04322eb61fa. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEN961731304.