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 0x8eefda893c1e47343803133ba852d4e1c01c08fde6b326200cbf6d3b903495c5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ad6a3b-b75e-4de5-92d4-bc2f860eecbd.json and https://artists.proofprofile.net/proofs/artist/66ad6a3b-b75e-4de5-92d4-bc2f860eecbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelenka: Repons et lamentations - Office des Ténèbres du Vendredi Saint
Jĭrí Antonín Benda: Concertos pour clavecin et orchestre
Mozart : Sonates d'église & pièces d'orgue
Rossini : Sonate a quattro No.1, 2, 3 & 4 pour 2 violons, violoncelle & contrebasse
Telemann : Concertos pour instruments variés
Concerto, en la mineur pour basson, F.VIII7: Allegro 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 0x7abceaff93db783b5ed0dc3e9f6b943e1c517fa283628df16639025ea876c9bc. 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/FRZ179204890.
Concerto en la mineur pour basson, F.VIII7: Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf654bcc8159a63b29b856b8edba9b59f4dcd26fe3a43abf9066bc690809effe. 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/FRZ179204900.
Concerto, en la mineur pour basson, F.VIII7: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb605943dba3414eed9dbe3254635cdf7c355cbb440a1070dcdc23f261f1819. 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/FRZ179204910.
Concerto, en mi mineur pour basson, F.VIII6: Allegro poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53ef5994249e53ac31e9f1d1be1f8fd32de46f60d6eeab005e395eeb71409af. 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/FRZ179204920.
Concerto, en mi mineur pour basson, F.VIII6: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d42e1063799be4820eb539a583df57033242ba06eaf0f524618e916a6739bc. 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/FRZ179204930.
Concerto, en mi mineur pour basson, F.VIII6: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12dae18815688517eac7416f9e806bb111f0d085edb74ccc311ffbce507d1fb. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FRZ179204940.
Concerto, en fa majeur pour basson, F.VIII20: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d64cfc4a72de13da0d8e35c4a3f292c92879f784d07230109934915864a652. 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/FRZ179204950.
Concerto, en fa majeur pour basson, F.VIII20: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd4724d8d6f6957c4d1860cc37ea35ad93038ffe9470ac23f2f5aa0bbb2774. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRZ179204960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f97cb252098d574fca5ff9b93ffed9ba3e9b2da1997c0801f6058bdea1ad81. 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/FRZ179204970.
Concerto, en sol mineur pour basson, F.VIII11: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d818fb713c0c92d5293de3b0bf3e5bc4a1b426887d4d21fe7f0c28f9d0efaa. 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/FRZ179204990.
Concerto, en sol mineur pour basson, F.VIII11: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e31e6f4c0ecaf6a32d7a8dd90b10db0f15c4ba8cf9c8bba83e7e961f3370f6e. 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/FRZ179205000.
La Notte, Concerto, en si bémol majeur pour basson, F.VIII1: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af0100872c2f270807ed44bde46d96eae54352e9917fcefe04a3f96303b82de. 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/FRZ179205010.
La Notte, Concerto, en si bémol majeur pour basson, F.VIII1: Ii sono, andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1586eb3a6bba463ce2ece932636a42223ea5613fea5eb8112373cf07f386e311. 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/FRZ179205030.
Concerto, en fa majeur pour basson, F.VIII8: Allegro con molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f2b984decabaef51b32184d0a2827d839b53527a21a900da291df98990e3c. 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/FRZ179205050.
Concerto, en fa majeur pour basson, F.VIII8: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c72d905327e0d24abe74f6ee2944702e3fe2a31c982d869de572fb6afa2e3. 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/FRZ179205070.