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 0x87b97176f8b7bb6dc469480295af4db554fb88edb13c73d9d34bf3c864bb7c08. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f09866d-614d-4c90-8cb9-d281d9a00d27.json and https://artists.proofprofile.net/proofs/artist/4f09866d-614d-4c90-8cb9-d281d9a00d27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eliasson: Horn Concerto / Violin Concerto / Desert Point
Duvernoy / Dauprat / Boieldieu: Music for Horn and Harp
Gud bor överallt - visor från Italien och Frankrike
Horn Concerto in A Minor, Op. 28: I. Allegro pathetico
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 0xb5cd7214c9956a8b03ffb30e17564d75827b516f20a50c97082c71036ae819ee. 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/SEAGA8816040.
Horn Concerto in A Minor, Op. 28: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c4b1d41b317957a9e2b437b2651c8bcf86900d222189dfc576e127f057976. 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/SEAGA8816050.
Horn Concerto in A Minor, Op. 28: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08601cf687e1d0c10b2c2e067be079ec0d5e1e3f31b00abb8a3f04c3cc636ff. 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/SEAGA8816060.
Horn Concerto, Op. 70: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b57d49499f0d888d69f796140b333348050283293935a6de3f353f8fadcc0f. 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/SEAGA8203020.
Horn Concerto, Op. 70: II. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0096fcaac7814e94c74c485223f8d2f4983f386a3ad4e610999e18c0d68f8c1. 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/SEAGA8203030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630beaf9d28d6573a80d968c9426586f55f573d49158b87d989a4ac49978fed1. 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/SEAGA0623110.
Conertino No. 5 for French Horn and Strings, Op. 45 (1955): I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eaacc79badf1b1b7d7f70ee1b3b698ad14c8c7f4be52ef09fea51611fc8390. 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/SEAGA9511070.
Conertino No. 5 for French Horn and Strings, Op. 45: II. Lento cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e4d6eb50729c7220c19ac031fc9ee03533eb83fe03d8bf9e4c60e04eb84896. 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/SEAGA9511080.
Conertino No. 5 for French Horn and Strings, Op. 45: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b8a8caf182e63c9a339780a0d4df0a51f5c8b84eda4081759729559acb2907. 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/SEAGA9511090.
Horn Concerto, "Farfalle e ferro": I. Risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfc87ccd6c82f9b8e70059e9516cef11e14ca5949289329328506674058a952. 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/SEAGA9501010.
Horn Concerto, "Farfalle e ferro": II. Lento (attacca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68375c93d4a48b54811cc7d9c3523f99086703fe592a4ee1d0c616a8656a9edf. 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/SEAGA9501020.
Horn Concerto, "Farfalle e ferro": III. Presto, leggiero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c06e1b04556c2b4c737eabb6ee471c5a940fda6c8158480391b5814bae6e853. 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/SEAGA9501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5e4daf84811f38dc49067b53725270e47dc2291902a00aaacce0476225c0da. 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/USHM82328386.