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 0xbfa9b460f8578e184b369554aadf83aec848567c61fc4c0ce7679c0d45b66f75. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0361723-60c8-46a2-8508-46ecb3ecc7e9.json and https://artists.proofprofile.net/proofs/artist/b0361723-60c8-46a2-8508-46ecb3ecc7e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guided Tour of the Baroque Era, Vol. 4
Magnificat in G Minor, RV 611: Et exsultavit spiritus meus
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 0x10f2b2b8ac9ae0e77f41438d3c12a656e99db5ccdbd3bba1075795ef502668c7. 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/HKI190837302.
Magnificat in G Minor, RV 611: Quia respexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f63ad3334a1963e93554ae0b75bc4e5f77fbe718b3da8e24a5e5c73d4044ab1. 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/HKI190837303.
Magnificat in G Minor, RV 611: Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67814c9248138d457838f7f65c39c3bbc2a47b9beea06e7101bcc028770cadfa. 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/HKI190837305.
Magnificat in G Minor, RV 611: Fecit potentiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771521b8a064a24893d709ec196656cdf1064b677558cbff7c3518422f94e58b. 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/HKI190837306.
Magnificat in G Minor, RV 611: Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50b8b3d5436871bc8df998ec7892886450fee6e1c6236b98f5def3d1624b3a. 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/HKI190837308.
Salve Regina in F Major, RV 617: Ad te clamamus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad761777ec140712cb3e8ac0ad164e987074e43cf2e3b13e4046423e1497837c. 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/HKI190837312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f604431e62609d680a2e8f6a4008982284f9b41d57758c00460d45bfc694fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190837316.
Nisi Dominus, RV 608: Cum dederit dilectis suis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc037fe7680cb84d5cee4584e22e225279bf3e22f399f70c45691af0a90e6377d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190837319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b126080e67acbe31a4972ca52a8b595045173d0690bff94b4d1fb3b9539d4. 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/HKI190837321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b95ee9f3f9c1413830c034fc8d35183f3516ac3b3ae0985f392e0e395090937. 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/HKI190837327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0d2553aac9529406caabb560f1e9491705a0b43e461b0391df8db2ad008a39. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI190837311.
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
Salve Regina in F Major, RV 617: Eia ergo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400e8af257895027f81bcb992af686c948e928040f055bcf6683face171143e7. 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/HKI190837313.
Salve Regina in F Major, RV 617: Et Jesum benedictum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa71e4040e6072bfd06cc4073994c00f1e30d6dbaf6be9daaf763a9c751f8207. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKI190837314.
In furore iustissimae irae, RV 626: Aria: In furore iustissimae irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a933800a4193536e1c3b34786c01e49040d1b57546e66748590c7296cebc3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190837328.
In furore iustissimae irae, RV 626: Recitative: Miserationum Pater piissime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e20846e4f02c5187373ed3bdcdc82ea3efa93c4c84a5488739b6ffd285b77fe. 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/HKI190837329.
In furore iustissimae irae, RV 626: Aria: Tunc meus fletus evadet laetus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d0f43af0805db2790e0675c8c0b43c10d0df491a7c3c0501690d7b9bf60003. 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/HKI190837330.
In furore iustissimae irae, RV 626: Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3c6cb15dd6b1e011e15d77ba8f01b0ece396d36663a68edc276d99e08bc565. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKI190837331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc2f15912f65b641729db4d4cb7989ea6dbd910753632fc5bbc13d81cbe9c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLWD1802301.
Oboe Concerto: I. Rondo Pastorale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3101ec6b946190ad31f8527909ee92c9fb59befc1b1b0be72153a853895d3dce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLWD1802302.
Oboe Concerto: II. Minuet and Musette. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd10bdb950cc5e0a9c499f1c92f40dd82464111bdd25d98ef1d9b5f692a2b0f6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:54:45Z), 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/GBLWD1802303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452bacddbc7e8a290d8719f1918bc72d87943d83632a57d1a2e7caa4b5ad569. 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/GBLWD1802305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2202ca05eed5001f236d34e01a1d9a6e60259835af76b42a64b26883e1cfe58e. 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/GBLWD1802308.