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 0x0a546ab9ecb4b82a7989b6046a08b234b9a3187e2bd45cdd3ac6cc7983785873. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d255505-8513-4c0b-9d1d-5c674c2284c4.json and https://artists.proofprofile.net/proofs/artist/1d255505-8513-4c0b-9d1d-5c674c2284c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
WOTH - as told in 3 chapters and an introduction
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 0x312151d2b20a1399f30ff7a1556c93337edeefa832e8e771f955d9c2d7141691. 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/SEYOK2403348.
Fiori musicali, Op. 12, F 12.35: No. 35, Kyrie della Madonna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027cb00a8e620e8f44ff7bd8973b0610ffa00cdf70ded4001f2e705004dd665e. 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/BER181637202.
Fiori musicali, Op. 12, F 12.27: No. 27, Canzon dopo l‘Epistola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30139dccacbdc8dd6efe66517d4503a615bdeef5576ac8cb9ed57759f6c4597c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BER181637203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a82b6757633cdce9c41376ffe31261335d272f9f85ec14e31da97eec28c147d. 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/BER181637204.
Fiori musicali, Op. 12, F 12.42: No. 42, Recercar dopo il Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05887ff028322b758f7c516862c71eb30affb9997c04334c4df6fedd340313c. 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/BER181637205.
Fiori musicali, Op. 12, F 12.46: No. 46, Bergamasca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967d588608cca05856f8e1044842c53037f9fb1a243d2a4b8b7049d8f6dc32a. 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/BER181637209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd42e37a4f88d801a263f291ca8bd1c1e7ed6d9633a16ece5913ca3c570310. 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/BER182143534.
Cavalieri Imperiali: Zenobi & Sansoni, the Great Cornetto Masters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c5ebc3b661021689558b28b59fb38c59cebf5b07e716cf17f0307b9607b530. 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/BER182144314.
3 Equali, WoO 30: Equale No. 1 "Miserere" (Arr. for Chorus, 4 Trombones and Organ by Ignaz Xaver Ritter von Seyfried)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2403391720db4bb59bdcd235d092a7584f180eecf11ae726e516f4561d30f34. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BER182144301.
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
3 Equali, WoO 30: Equale No. 3 "Amplius" (Arr. for Chorus, 4 Trombones and Organ by Ignaz Xaver Ritter von Seyfried)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f79c609947433e5ad6972a252b2e1a736567aeef3094c96aa1fdfe028f3e8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BER182144302.
O meine Seele, warum bist du betrübet, SWV 419
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf45b8736a8dd12b42cad2d1ff0e47018ccfa1f2d72bfaefeb61a6df28b588. 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/BER182144303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daff0103488d948f7db34a69752640ddd4587911e666a709d540b26e94d8b26. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BER182144304.
Mit Fried und Freud, BuxWV 76: III. Klage-Lied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7d382ad2cec66c76e5245f97ce86f0fa77b5802bf88785ffc483b11ee74eed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BER182144307.
O Jesu Christ, meins Lebens Licht, BWV 118
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf209430c08ecdd2ffd70813e1cde0ac803462ea87ff0f6dd3c3c967373d8be5. 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/BER182144313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f73a80cb502f60d0df768ec8fae0f66db856f430f57774f026298910260459. 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/BEE021602307.
Lasso: Lectio Sexta "Quis mihi hox tribuat", LV 681
Boesmans, Bartholomée, Foccroulle & Mernier: For Early Instruments