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 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 0x3391f7013324c7ba7a8ecb1f945d8d4e5a169594d3f19e7531a097eed1940db4. 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/cd466e3d-ed5a-46ed-874f-7b66949a1068.json and https://artists.proofprofile.net/proofs/artist/cd466e3d-ed5a-46ed-874f-7b66949a1068.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Krommer, F.: Oboe Quartets Nos. 1 and 2 / Fiala, J.: Oboe Quartets in E-Flat Major / F Major
Oboe Concerto in A Minor, RV 461: I. Allegro non molto
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 0x44e78640089c5eb567f61203e4307ebd34a283246da07508aae306ecc1ce37af. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEFG21620804.
Oboe Concerto in A Minor, RV 461: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51299ebb77f56f0c9747c0efbde4a35efed8b3ba7d4aac0f355b509935c6495b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEFG21620805.
Oboe Concerto in A Minor, RV 461: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270d029ce75d1d1ce73f15e75ce1cb8188ccf7e4d9b20d5ccc38ced138ce15d2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEFG21620806.
Oboe Concerto in D Major, RV 453: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc401bdf6b592d53f6808d9b352dd4cb3497ba1a4b0dbc349837a8c2bc1b77c1e. 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/DEFG21620810.
Oboe Concerto in D Major, RV 453: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24457bb8417c78396db5cfeebef85d0e85f0a7291eae301e723d8f78fcf8bcd8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEFG21620811.
Oboe Concerto in D Major, RV 453: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ef8767e6856cfdbe17b0a0109d5365c464c184b21699530e48a845595d2ee. 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/DEFG21620812.
Oboe Concerto in F Major, RV 457: I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fdc858ff57278499930949bbf5b936ac63c1a6cc5a933d3afcb48a86b7764a. 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/DEFG21620816.
Oboe Concerto in F Major, RV 457: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c986933315fa1a78eb1a93a03eecddd6d448ba3a1d88b9a81e74f94a4b94e78. 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/DEFG21620817.
Oboe Concerto in F Major, RV 457: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aec5e7b10d12ad68e28f87ac0e8024e1d039c2a61780dc3f60a322ca46d072. 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/DEFG21620818.
Concerto for Oboe & Bassoon in G Major, RV 545: I. Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb153925b0347174ce40e23f0f3a79ad1726fb46285468d7533473f9ba73d5d. 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/DEFG21620819.
Concerto for Oboe & Bassoon in G Major, RV 545: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a7a5305b506743edecf8545dc212c55b0285089cad69be74832252ec3450a0. 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/DEFG21620820.
Concerto for Oboe & Bassoon in G Major, RV 545: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659bedfdf07e8bd7df2aa9851b7c266bc09a734b17aca45c44fb1757e7161392. 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/DEFG21620821.