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 0xb3199347acb3661452bb221f6099ed577e5e55cace2bb8d580e79c4d74c2c27d. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd0c419-c7fc-4d3f-83cd-842565e67c41.json and https://artists.proofprofile.net/proofs/artist/cdd0c419-c7fc-4d3f-83cd-842565e67c41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ayres for the Violin, Book 1: Ricercata in C Major
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 0xbda04ea30a734c660bc86386389e5fea77426bf8cc65996e85f29bbb5f03e10c. 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/ES7892300108.
2 Fantasias for Violin: No. 2 in A Minor "Alia Fantasia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aa057c1db68b32ea7e284830aa9641444ce07f497514e66c556087c20d9f23. 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/ES7892300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f5da94d9171b0b899ce329b0c6da7d523877a1e61ca914f1620ded7183a27. 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/ES7892300113.
Canon and Gigue in D Major, P. 37: I. Canon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e596a739b59306c3bd32f7286e73c13efaa038eddf374bac07a071f4c667965. 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/ES7892300116.
Canon and Gigue in D Major, P. 37: II. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2c08b80943bd48fa17ca40bcee9c20df7f3526f30d55745282d3c541aef666. 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/ES7892300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f270f6ac1e53094b06df962f621efba3e3e4f9ade9958b4c10c9dfa8b313855. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES7892300101.
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 0x68ddb83aa4f4026b6a39ed53643998be2c04dde01acb914c34a34bf6e766eff6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES7892300102.
Ciaccona for 2 Treble Instruments & Continuo, Op. 12 No. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f6066c77af6d57e8e882610422bbb8e600cea26b28ad2352c09cd5adc52be2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES7892300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75330d5a93153c9cc959a4912a68406036256fad96ba56bbdf4a8c21c1e004bb. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES7892300104.
Ciaccona for Violin, Violia de gamba & Continuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1373ca9ca17633c4cf163ad77c797ee04482d571c572ce1247b10e55dd787304. 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/ES7892300105.
Ciaccona in C major for Violin & Continuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0209176be7bb76021874773382f360f99d90ddb5d109eb9db5d512222289ddd. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ES7892300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa374b050a4e26fb6097a07d5dea4ba7b58d92cec9cfffa187334d5a4713e938b. 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/ES7892300107.
Ayres for the Violin, Book 1: Diverse bizzarrie sopra la vecchia sarabanda ò pur ciaccona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3854d86af1f5209fb0b314b81f3272c2ca7590157b268ae994802eb6a33872c. 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/ES7892300109.
The Gordion Knot Untied, Z. 597: VI. Chacone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcf06b357cc556e6de46e98bf0ee61244805a68e981543b10581723178e5d66. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES7892300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935b0416986dffcc765e5c7290edb1844be6b54b1191d4c6a066f99e21973c5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES7892300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9aad73fbb8cad1a33c33a59a619f23d2d80af395b58ad30f31c056f9bc0d8a. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/ES7892300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3454fe7ee0957f9a6a8712f3c1a5e58fe26f0c95c47373824585459ae4674f3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES7892300115.