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 0x42f219064464e31b8769afc4d0116d75abee353bd82f89eca852f9b3d35f9a43. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28c256d3-6f35-49a4-9416-d14fc994bcf2.json and https://artists.proofprofile.net/proofs/artist/28c256d3-6f35-49a4-9416-d14fc994bcf2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony for Two Flutes, Two Oboes, Two Horns and Continuo in D Major: III. Scherzando. Allegro
Carl Philipp Emanuel Bach Chamber Orchestra
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 0x160e332f30bd29ca8b7f1dafd9efeb6732b5ee23111575419614f267dd9bc547. 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/DER411090357.
300 Jahre Jubiläum Friedrich II 'Der Grosse'
Frederick II: Flutenkonzerte und Sinfonien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764a6fca5c632e3c9d7b53eb864517d7c429e52083f6fd8dfc283361d253225b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEB260800101.
Friedrich der Große - Musik aus Sanssouci
Sinfonia in D Major "Il re pastore": I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180f96144e5aea38aaf0bcd1c0c079112c6afe4c22058eb346900c76e16cf33. 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/DEUM71103351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5034a6186f482198141b196ce5cca8c425d25200c7e4b86cb9d45173962ff9. 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/NLA508205203.
Friedrich II - Flute Concerto. Sinfonie (World Premiere Recording)
Concerto No. 3 for Flute, String Orchestra and Basso Continuo in C Major: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b11f35c6a2c9665479d7bacc0ac09bfdd5cc6af208d6f2c3bb2502a4d43cff1. 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/FR96X2104576.
Gebirgsmusikkorps Garmisch-Partenkirchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec7aae2f9cbbde8c02884699003155606f1752f338f29abb2dd596af25b7812. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ATK229900195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ae7e92f967ed591eacbc90955a8f3bcb8ca9bb26ccbe001b910dc0d9de0b9d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ATK229900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfe5483206c40b122201da4077c955f62ab81fa3723ff1ea13b4d70135c164f. 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/ATK229900199.
Gebirgsmusikkorps 8 Der 1. Gebirgsdivision In Garmisch-Partenkirchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf6d026f82e1b8db4df50ccb0dbcea39f2c8fc6d3f37788fe20503a4b4fc5f. 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/ATK229900202.
Marsch Infanterie-Regiment Großherzog Friedrich von Baden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffec7182c2015a1273e03d5016202b086af6b4c5c9f1e498671ba627a4ce90cb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ATK229900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00fc25d95be3dd3a1f5a9a7370e4c788565b3dd078fc920c95513951c3d1b0. 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/ATK229900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cdc1289040a7473579d643c5a8afa3a62c27227c7b4a3e3254797bcf6445e3. 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/ATK229900206.
Recorder Sonatas By Bach, Telemann, Handel, Schickhardt & Frederick II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3762d40618cad5db921111163fce7c685b4d8aa53633f0a713207ad497cff0f0. 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/NLA508401402.
Friedrich Der Grosse: Music for the Berlin Court
Music at Sanssouci: The Court of Frederick the Great