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 0xaa2d22445dd63542a96420852ac8eea6ff93895840d44382f6d7139e36afb8fd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f580f585-8172-445f-9a1b-1c44b26c4f48.json and https://artists.proofprofile.net/proofs/artist/f580f585-8172-445f-9a1b-1c44b26c4f48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Keyboard Sonata in B Minor, Wq 55: III. Andante Cantabile (Sonic Anchor Interlude 1)
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 0x560d8d0e468d1bb0912e13625d768cdc0ae2e9006951f0eddc77914afa66dee6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:40Z), 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/USCGH1723076.
12 Pieces, Op. 40: II. Chanson Triste in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0849cfdf8cae1b03dd0219b47b575ba5cb4a5238f266924a76fea97e0c1483. 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/USCGH1723077.
Piano Sonata in A Major, D. 959: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a039ea9313045e31531afb016e29327899d4925eec0dc205b0561d6343b7643. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGH1723078.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f26d0bbe2d7eeb3cbe5d19bbb875706445f736bdf7bbbeabcd819d8fb3b0e. 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/USCGH1723079.
Noure and Anitra Suite, Op. 13: No. 7, Berceuse in G-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74db1b62b4001fd58a63e79b917725bf800e57c68d616a65344487b8d29b7f7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGH1723080.
Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Lento (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63285306ee3e93a5a3078f004813e22d0177a8cac2dffde1bf4c8cd0e800cba9. 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/USCGH1723081.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a893330af8caf41b895fd5b34bec22fa64a1d03145da0899bf20f58d32f55. 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/USCGH1723082.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb2472ec28a15fdc89d79f034eb01b1f8cdcbdddd448473ce3011760d465a58. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH1723086.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26aa10ea6620fc39cc749b901f24970e3cf7cac6aea5776534681b0dddd37e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:45:13Z), 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/USCGH1723089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd521c9db7f9d7f9721203f8cf65f2c05dbf9afad87f6091a8f7df2365a73c428. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USCGH1723090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1c9ef19976650cbab90fd1730d6c846025c9a4912bfd68ed722d5c68a156d2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USCGH1723091.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc737d4ae0f65f4197c61ae309e737884e669dd869a769336695ece17a31ddf3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH1723092.
Scherzo No. 4 in E Major, Op. 54: Lento (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8eb3996371d3d1c4e593fe67b8baec31b33584d36f12c5542bcc90bc2aa282. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:19:24Z), 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/USCGH1723094.
2 Pieces for Violin and Piano Op. 11: II. Chanson de berceau in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566fb4547d056ad5c3d915c4a1f5b96afb05aea255af7c970ba11984910ab149. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USCGH1723096.
Piano Sonata No. 16 in C Major, K. 545: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ad2a9195e5c8290ba2eaabc16e4ee0d928e356bbd1a07f7704a574785e16e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USCGH1723097.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda904766359400b0f9ffc1c3a40b7c83e36cdef9ee4e6cb09a34994748e90f34. 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/USCGH1723098.
Kinderszcenen, Op. 15: No. 1 in G Major: Von fremden Ländern und Menschen (Of Foreign Lands & Peoples)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0e0e0459b7b3ba3c7f89ea7d39215df89501768933ed4240204bdcbc1ca28. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USCGH1723100.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd8836483cb7d9d03078ee13e69286455c517bbccb2c11596112bdef8ed91d. 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/USCGH1723101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d380608cff51c4653373a8a750ee1c07bd16da287c4d9e1d9cbd9a8580cead. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1723102.
Piano Sonata No. 21 in C Major, Op. 53 “Waldstein”: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745d18c9f8a80ee4d0ca52bf91e4f36ef76c15aa41605affa0c287ab24268cbe. 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/USCGH1723103.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 10)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edc01bd3d481c70d93570fb33265870544928702c973abbbb8c266bacbb172. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:16Z), 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/USCGH1723104.
Prelude in D-Flat Major, Op. 28: No. 15 “Raindrop”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1260826b356decfbbaa6bd95a464772572a49c7ba5137d3481c2288300a6a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1723105.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 11)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31823306b9f10af0a0b0e4deef19919e3e3eba08c31f275fa9e158f35fd77531. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USCGH1723107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d386521feb3e32b7058d80a63d17dad2056da6160b74ebf1df1f38c2e9311f3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGH1723108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeacc964c0a1039f9743a8a5508e6ba9974e0a56d4a025bd0a5e3196e4f360b4. 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/USCGH1723109.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 12)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434bedb5da35d32241d5a26a789c4b12caf4e2572ff5cea91418ff4ca963e2d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:10Z), 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/USCGH1723110.
Waltz in B-Flat Major, "Gertrude’s Dream"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3e169e064e7e7af48fdc35e23d5e8f29c25914ef3ae10dedb5424bfe26550. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGH1723111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81597455724808c81c65cff94047c8979e21ac6ff8741e699a217ee852f72f. 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/USCGH1723112.
6 Klavierstücke, Op. 118: II. Intermezzo (A Major)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcd53ed9845a1d85d14377b61a888a25f75029928e7eab3e5844f0ac8b3cf19. 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/USCGH1723114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88001e633af7bb88f2d19a094c07c9b83b5bcbe5d54e3fafe9d5049b2b63b8a3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1723115.
Keyboard Sonata in B Minor, Wq 55: III. Andante cantabile (Sonic Anchor Interlude 14)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b00c4799df220c70e40b26da1be4281ba9bee5715d13616dc47c718662ce0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:38Z), 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/USCGH1723116.
Suite No. 4 in D Minor, HWV 437: IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bacfcf80a78ced17f7d955cbf5d1a9d26838da607d558d2615c786caa533564. 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/USCGH1723117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd8ef822171336a7108942d261d0325795463ca6732979c3a8fb823b2fe04b7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1723119.