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 0x2d952e1e43cc64fb3720618f84b90513e91ed2df763e9d242a74b78bbd40ff1d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97cadb15-a7e4-4202-a679-4ac85339359e.json and https://artists.proofprofile.net/proofs/artist/97cadb15-a7e4-4202-a679-4ac85339359e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viimeiset kiusaukset, Act II: Paavon virsi
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 0xeb308ac5186d77e4ac754babbde57ba8b2bd112d83c72d51db1af584891299e8. 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/FIFIN7800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ae4b133284d6bc4c222d0677c3ffd34cde0d5b8d6d04715389ad5e21d2ab0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIFIN9100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fbf5bd4bdc45549e0be3e363ffa564b85f964408b777ac33c32d695b75f922. 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/FI2KK2300036.
Preludes, Op. 28: No. 7, Andantino in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c2fd1d7513497332c345cd3a4885251811bb0e3e633445aa749fd513005f0. 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/GBAYC2102462.
24 Preludes, Op. 11: No. 8, Allegro agitato in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a41081ba8d9bc23b7097c08907b89f635f8658292c66d9125418069f5f7f3. 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/GBAYC9600922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621de62f17f281e5382cbd6c00ebbdbd22c9ad3f6e6339ce5fe499390872b86c. 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/DEC628800661.
Bach, JS: Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a00509bd79660adcc9bb3c624d65db3440b31978581ba069787112c24c1cfd3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIFIN9100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedf0b603af56e392f62e8b8c34fce945631314d7630df84e782b500c8181dfa. 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/FIFIN9200700.
Guten Abend, gute Nacht - Ruhige Musik zum Einschlafen
Saint-Saëns: Le carnaval des animaux, R 125: XIII. Le cygne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21aec79f58de9ce1e132ed7f60b6bb6a4adb9abfc9c4f076a42b7709bb0dbae. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FIFMF7700089.
Schumann: Kinderszenen, Op. 15: No. 7, Träumerei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c350be6a4e4ba05d546e087fed6e720d8e27a94ac53a951851b392ee7bec52. 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/FIFMF7700090.
Bach, JS: Orchestral Suite No. 3 in D Major, BWV 1068: II. Air (Arr. For Cello and Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a4a971b921a48a17aefb986457683dfc24814e667765d01ecfb5d36ac3e88. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FIFMF7700092.
Handel: Serse, HWV 40, Act 1: Largo. "Ombra mai fu" (Arr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9931ad0edf629e96121bc10c2a3bdd7b0db8439df90441f8d5f5aaf3f8d46e07. 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/FIFMF7700091.
Rachmaninov: 14 Romances, Op. 34: No. 14, Vocalise (Version for Cello and Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df9f0377a0a7a3faefa16cce4b3e3fa136c37d250d75244ae8a47ba079c84b2. 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/FIFMF7700096.
Schubert, F / Arr. Casals: Die Biene, Op. 13 No. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f110c787996f35f6084923235fcc1fa514492e1330307bcb16678e4878e6c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIFMF7700097.
Sarasate / Arr Noras : Zigeunerweisen [Gipsy Airs], Op.20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2400699a2b3922e4a366f6a33c66779d67ef2ea6f8284db7654d720d1f4b9c. 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/FIFMF7700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9871d19c74854831d4172598464bb964ba5d838269eb485288531576f106afb. 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/FIFMF7700103.
Sibelius: 5 Pieces for Cello and Piano, Op. 81: No. 2, Rondino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd82f536feae938ddccaee65457630807384d9c26c1512334fe2c127bde198fd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIFMF7700095.
Sibelius: King Christian II, Incidental Music, Op. 27: I. Elegia (Arr. for Cello and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e687b10ce2e6dbffa2ae326b0eb8b49c3a0eb047a5644c4c28be1815ec91a5. 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/FIFIN9200400.
Sibelius: 4 Pieces for Cello and Piano, Op. 78: No. 2, Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fe63490e2ec264f9f2a8ff205f1c8592057448b70342c9678fae7d1ff8b44. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FIFIN9200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedf0b603af56e392f62e8b8c34fce945631314d7630df84e782b500c8181dfa. 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/FIFIN9200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ae4b133284d6bc4c222d0677c3ffd34cde0d5b8d6d04715389ad5e21d2ab0. 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/FIFIN9100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c212cae24e1c342ab17818014751ae22b53a36b976cd1b45e7b90279de6746. 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/FIFIN9100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a55cdb3b73f6db5057d1b353dcb6328424f2343c568e4fdcfd44f787e16d825. 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/FIFIN9100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7280cdd7b3f902ba0234ee171fb25fac159c3288f98c2bb196cdfa71f58dd298. 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/FIFIN9100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4bd02773b5e82fceb8c95f9bc7f17fed8184765c7aaf9cfca6b5ae4402b6b. 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/FIFIN9100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d4242ba1ed2b7ea545a47508879ec943e9c21b9141cfbf800e4c01d44c8350. 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/FIFIN9100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f732365365dd1ee68538e0dbb7d571771610ec879694ba7624324d77e07d1f. 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/FIFIN9100013.
Pablo Ortiz - Anssi Karttunen: Al Compás del Corazón - Messages in tangos between Argentina and Finland