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 0xd2feae09a06a3133ebf8cd5603749a541ebd9231b7dcbbf363f2f020ed536fe9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c376afd-8df8-44d8-b0d5-26f76bf76152.json and https://artists.proofprofile.net/proofs/artist/3c376afd-8df8-44d8-b0d5-26f76bf76152.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fux: Suite in A Minor / Ciaccona in D Major / Haydn: Piano Sonatas Nos. 40, 43 and 44 / Adagio in F Major
Suite in D Major, Op. 2, No. 1: VI. Menuet Le Comte de Brione
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 0xd33cb5feeb0272a839cbe84ed0debe5c26b6182891dd49b693abd43eea8b7aa1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DECP60001006.
Suite in B Minor, Op. 5, No. 4: V. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111ee3a635c8b43067f9b7e6cb5d0437e5c1b1836d8662729f1314a7704fb84. 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/DECP60001024.
Suite in D Major, Op. 2, No. 1: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6aa2228aecabf5f81e037c8e37bbb37d44ac126e5ac3ce0cd3e74109c3007e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DECP60001001.
Pieces de viole, Book 5: Suite in A Minor: IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491e8a52e1bfe3a3ac96df9c5052463ec12431a166d458bc0e3671bf5c0c2fc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DECP68701014.
Suite in D Major, Op. 2, No. 1: II. Allemande La Royalle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf167517d6f4867f1f334dcc53796696ff0511e0f8b7f208d467a44a187b04fe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DECP60001002.
Suite in D Major, Op. 2, No. 1: III. Rondeau Le Duc d' Orleans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bfe7aa91fe46e30d7c914fe8941965b9662ef703ca8954bac10a1d0e904bd9. 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/DECP60001003.
Suite in D Major, Op. 2, No. 1: IV. Sarabande La d' Armagnac
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd3b67a984d62e21b873f56eefbf55badd9a9ee00b5a6858c2299539a653d3c. 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/DECP60001004.
Suite in D Major, Op. 2, No. 1: V. Gavotte La Meudon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5f6f0fe02c47e00d0ee3227ea42a648a78552400634b32f56a222b0595e05. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DECP60001005.
Suite in D Major, Op. 2, No. 1: VI. Menuet II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b2b21a45ecaa852d65bb8206faa95a00fefb14c3f5a3e4de0556e7e65180a0. 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/DECP60001007.
Suite in D Major, Op. 2, No. 1: VII. Gigue La Folichon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e211a793c6f799c8c050e809a9e42fb2c5dc35e1f8babbb2cbdd889e97f333. 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/DECP60001008.
Suite in G Major, Op. 2, No. 2: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b17d2ade424c8624a51b411fc596b12d488d4a3785d946e72576ee69c0eeac. 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/DECP60001009.
Suite in G Major, Op. 2, No. 2: II. Allemande L'Atalante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab14629d0269758b7ea0034e4b687e3a5f089df8edb57dc401f7f4b6488050d2. 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/DECP60001010.
Suite in G Major, Op. 2, No. 2: III. Sarabande La Fidelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3705125490d7a263bed3a80b5f8e98c0bc8988fb4cb8326444a6d7204c4330b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DECP60001011.
Suite in G Major, Op. 2, No. 2: IV. Petit Air tendre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a96e13239bf030841a4a327f2f67eb70d7f083695c527ac307666398d5eb8a. 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/DECP60001012.
Suite in G Major, Op. 2, No. 2: V. Gavotte en Rondeau La Maillebois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef71244c942235f0d7b4f03a7533e116f2fb3de98e9b689c13ee0392bb289c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DECP60001013.
Suite in G Major, Op. 2, No. 2: V. Gavotte II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf40161e7cdaec03681260e51c341ac27a68becedbcdb02d66f6be93a5c92755. 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/DECP60001014.
Suite in G Major, Op. 2, No. 2: VI. Rondeau Le Baron
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec365ce10f2c2b01dd796be09144afb8cb3dd84e489d2131be136ff9d3c5d92f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DECP60001015.
Suite in E Minor, Op. 2, No. 5: I. Allemande La Chauvet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbd683f25370854e8680312822c3f734b00827b117c0958e638f4f997118de. 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/DECP60001016.
Suite in E Minor, Op. 2, No. 5: II. La Messinoise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612bab0b6539cd56842890f162f419d00b147acd0d1cd0b71ff054a033a22ce. 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/DECP60001017.