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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cba42b81c12ddac4032983ca03f589003948bd06b462645d81f0beffbbc092. 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/bb798ab7-726d-4305-a9b0-82da62fae621.json and https://artists.proofprofile.net/proofs/artist/bb798ab7-726d-4305-a9b0-82da62fae621.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Four Seasons: Concerto No. 2 in G Minor, Op. 8, RV 315 "Summer": I. Allegro Non Molto (Arr. for Guitar)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27c4469680e2a24695f3a6a748b54f792cbc2356010fe4db2f85af35e23154. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2402200.
The Four Seasons: Concerto No. 4 in F Minor, Op. 8, RV 297 "Winter": III. Largo (Arr for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219b132ef72220207c7365c0632af77276c93c9f7b7b7bc46e69904bf403fa45. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUGBT2402201.
Orchestral Suite No. 3 in D major, BWV 1068: Air on G String (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21c52c48606f87df3ca990d5bfbf21ff83ada873221830a7e3e68bb3b9e7eb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUGBT2402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd43996adb31999af968c932f3315541bee16cb2c27a5194ec630fdf9eb3a92. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2402204.
24 Préludes, Op. 28: Prelude N. 7. (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7720f88c9b4562e7af5c0fd25f0264d26fe56b4786859ddee2ec252d445c6608. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AUGBT2402209.
Peer-Gynt-Suiten Nr. 1, Op. 46: I. Morning Mood (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df7b79c2260042b42055e026a18f93f6d13868efb6bcaa6fe5cf2b8f3a5fd0f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUGBT2402210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45695a0db75cdf35cb0abaff2296350bae5bb671ab0abb31bd2b96593b783ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2402211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5deac1d4850e46bfe0a8ead171ce05e7c7ba57070bc692284836e9036ee85. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2402212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c85c21e195dad106be1f0fe1974a9335a741d52cc12e669006e0ffdefd925e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUGBT2402214.
Präludium in C-Dur, BWV 846 (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f435897edb7b0f76afb97551ee09cf4ba16f09a2b6b19c85e31dcbd6e63325b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AUGBT2402215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073a4cf9b9cffd9ae3b60a3d5246aeab3cbf48b5d7712d888076fcf02887d6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUGBT2402216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c7068e15d753bedad424c4ee1339d36105f019c2744696167e36afbf4af30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUGBT2402217.
Symphony No. 3 in E Flat, Op. 55 - "Eroica": Marcia funebre (Adagio Assai) (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf359a2ab3f29eafa0e4caacfa70ad79fed25d2bdf5f0c7c05f226343e5e2c8fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2402218.
Klaviersonate Nr. 14, cis-Moll, Op. 27 Nr. 2 "Moonlight Sonata": I Adagio Sostenuto (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580502368e4c175471e01d7f8e67e5132ba3c9206652fba161d487dbca32bdb8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2402219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f49e9ae431255937579d90b61cb5e8898ecf1980ccf23f0741c06a9965ed9. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/AUGBT2402220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fdbd3b4496788230f6a31471114842148cbb79047da4f8b5a42a3d8f2d9b2a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/AUGBT2402222.
Ellens Gesang III D 839, Op. 52 Nr. 6 „Hymne an die Jungfrau“: Ave Maria (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c618f06d0b4d34504c59de099a54bb1d970da8a5181accad1238d4151e5dddf. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/AUGBT2402223.
Suite for Varieté-Orchester, Waltz No. 2 (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ac50a753f3ce5fcf03753b0b92fc01e25bd6649fc92336a5d5f4c402ef894. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUGBT2402225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc6608b564e5b288f7e35f01bba5e2d594442d22fb9f3d6dcb705b5fb6fdc1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUGBT2402226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947c8f0d36f254da5fdb59f57fb4153e8fc5e28fa8d7323b35214d301cfa3363. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2402229.
Sonata d-Moll, Op. 1, No.12 (RV 63) " La Follia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2679b07fe98797d61719e1113e9d7c3830c46929ecb1772da2782a4c9b0bbe42. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:45Z), 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/AUGBT2402230.
Gianni Schicchi: "O Mio Babbino Caro" (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2657ae4702a32972af4434536b3a15323bbfa7b79532ae3efc6cfd5278c242d6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/AUGBT2402731.
Les contes d'Hoffmann, Act III: 32. "Barcarolle" (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c2758c94f57035185cb7c03fc63aa09524f378939f0ffe4aa570a2d58245db. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/AUGBT2402733.
Appunti, Op. 210, Quaderno Primo, Gli Intervalli: XI: Sulle Decime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cee32ee1dd290d1000b75fb7ae8a6249c7c1d8d95367d4b32e4f1247e6b4d0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AUGBT2402740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e03e37d0c7510287ceda3ecd0e7f18662c5984e9ea91794b4837a5f3b3143. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUGBT2402756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969cfc39b0c8da912e05af0e6c58ee81a6c7acfcd21ab386a650dc22e881330f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUGBT2402762.
The Seasons, Op. 37a: VI. June. Barcarolle. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1f79bd48dcda1969defb3c8d5c4af21fd617b20cbe6d1315ec3b73919a1baa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUGBT2402764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a9cd7ec6cb9a472d686a1054c63f18d94e08a8921df351b15fc1e109777fe8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:40Z), 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/AUGBT2402769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081ff3f3f876200cee1c65806b20c66d6f9f0f0392d3285583dc240301f3dcc. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/AUGBT2402783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0591febc515183feec287fdca6150119550c9afee170120004105f6f8ddf7202. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUGBT2402786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49fb22f9f0f52d0a3a91741197b74a2371d106794014df0ca299f877e4bcf49. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/AUGBT2402787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22169bcbf4c28986d550f1f944b7c0c1f671d1faea4ee4883545581e2c66242a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:41Z), 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/AUGBT2402788.