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 0xba660c9206bd5a25870cbecce1c3d5ed6ed2e3edeb8fdd28922d2e3c37bc910a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc051984-3b7a-4537-aa38-ec8a8843d414.json and https://artists.proofprofile.net/proofs/artist/fc051984-3b7a-4537-aa38-ec8a8843d414.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Frantisek Tuma (Motets, Dixit Dominus, Sinfonia)
Motetto de S. Joanne Baptista: II. Aria. Non fuit vasti spatium
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 0x460b193996aea4f3cc2e88faa7450eea47f74e96c697d3d0abfe08a594a7eee6. 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/FROV62334002.
Motetto de S. Joanne Baptista: III. Coro. Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ee1eebcb9d67d07310533ccbe030ea291ab3b11edccf65608be63db8de5226. 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/FROV62334003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7255a0daa71142d85b58868759f8719624e3bbc0ad4d234b0e93d3e05250533. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FROV62334008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd2e4dbf12f530fa5777594166a293a73a645ec9fc770522fc3dc7ffe3e4fc. 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/FROV62334009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f38875c8d4f8502b45c99191ff022a8cea9f9713a823de3519cc6074549b5b. 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/FROV62334010.
Motettum de tempore: I. Recitativo. Vilescit mihi mundus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60407b8b4077401ec5b5c7a8f2d5f23e281c3896ed91ee807ca45c7815aa1123. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FROV62334004.
Motettum de tempore: II. Aria. O ter beatum cor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5410e254f1760128227c31b3dae1ea6e0d14b96c40ff851d5f13411dee6461. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FROV62334005.
Motettum de tempore: IV. Aria da capo. O vera sincera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab035901974af6e124110597b0d6336de8c3871d09f53c5a47053c240703a3f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FROV62334007.
Motetto per ogni Tempo: II. Aria. Quam magnificata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c211dbe9b376ce461e57f9e25492391fcd0181df55dfd6809b1efa7043190. 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/FROV62334012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9fabd06579f5ffe3c076e7b30ca842310d8af022455337ac8431d0a9bd105b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FROV62334016.
Dixit Dominus: IV. De torrente in via bibet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abac77ff1e13322949abc6cad7cb2e8cc1a4997dde75cf380ede0f96f3ac15. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FROV62334018.
Tůma: Te Deum, Sinfonia ex C, Missa Veni Pater Pauperum
Richter: Super flumina Babylonis, Miserere mei Deus
Frantisek Tuma: Sinfonia a quattro: I. Allegro assai
Frantisek Tuma: Motettum de tempore: II. Aria. O ter beatum cor