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 0x369076c36288cfc85cb3ee256fac16b677bef91c2326ae19fea54cbc0d1f4def. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/455389bb-2c28-4b97-a7a4-df6d63edc2a8.json and https://artists.proofprofile.net/proofs/artist/455389bb-2c28-4b97-a7a4-df6d63edc2a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Corelli: Sonatas for Viola da Gamba & Continuo
Violin Sonata in E Major, Op. 5 No. 11 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): I. Preludio (Adagio)
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 0x1fd72beee10690539cf2f51fb18aafde04f35c0a3b6838f6e30387b887990824. 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/BER182244001.
Violin Sonata in E Major, Op. 5 No. 11 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3406634cb8b24503276e7045e251a461fba9932e9e6f46fb57313a8d3304ccc8. 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/BER182244002.
Violin Sonata in E Major, Op. 5 No. 11 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a0004c1e0cc95aef71b3cfbfc2ed71cd96fb10fb210c9b98cc20daf2b9473. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BER182244003.
Violin Sonata in E Major, Op. 5 No. 11 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a1d461f153da0008b291138d457fe8df884ecca7da558392f0620ed4e9ff7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BER182244004.
Violin Sonata in B-Flat Major, Op. 5 No. 2 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696d1c629393bbe967856b5998bcf64acab14b6a352300af551ba0cf7b31ddc. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BER182244006.
Violin Sonata in B-Flat Major, Op. 5 No. 2 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296245299d60f33e90d6f9af8cb15e372bbf50968a10d239232effa2dbfd6813. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BER182244008.
Violin Sonata in G Minor, Op. 5 No. 5 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00d36ea3f1ec9e5370ba0acfb284c87e0e1caddff271e218655a58dcd58283. 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/BER182244011.
Violin Sonata in G Minor, Op. 5 No. 5 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabdfaeb65268d7e57929d72c427f342c4c8ce7f40abe79addb47f1ebd3fb1d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BER182244013.
Violin Sonata in G Minor, Op. 5 No. 5 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e85750b778b04fe6452044e7450304fdf741b517def4b6a6982ab12aca63691. 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/BER182244014.
Violin Sonata in A Major, Op. 5 No. 9 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): I. Preludio (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d08d6b801fdd1e85dc6852bb0099b4ea43742c2623499d5ca2e22051b7551c. 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/BER182244016.
Violin Sonata in A Major, Op. 5 No. 9 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): II. Giga (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdffe3fa6f4580ee3a3526f2b142cd87dbfc3bbcc95bb0b1915307223b932ad5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BER182244017.
Violin Sonata in A Major, Op. 5 No. 9 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72795934b266ba13c182e019c0e27eb35d60ddc3a6bd214faee2178f6af564ba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BER182244018.
Violin Sonata in A Major, Op. 5 No. 9 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): IV. Tempo di Gavotta (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed57ab36f28769f2d3da146c9dbc32f0116691aadd0fc7b1851056b064fa04f. 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/BER182244019.
Violin Sonata in A Major, Op. 5 No. 6 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb1660a890a5caa015c66e6345991928875b4ccc904e32b3c1f996795e5e310. 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/BER182244023.
Violin Sonata in B-Flat Major, Op. 5 No. 2 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445752f1705c5be1fc791cb6d4d3e9a47f91c16ca7fbe182b49bd9050b84cf2d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:19Z), 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/BER182244009.
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
Violin Sonata in G Minor, Op. 5 No. 5 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): V. Giga (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce789f09444ab8a5ae0e71d1615d430f102c15edff5a634ebf98b8e81ce6e0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:06Z), 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/BER182244015.
Violin Sonata in E Major, Op. 5 No. 11 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): V. Gavotta (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30836b9157e8d0ca95b8252162cde94ef23a6ffdfb5b497bc1dcfd4858868a9. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BER182244005.
Violin Sonata in B-Flat Major, Op. 5 No. 2 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61db873f5da67d61cc5fa1a4079ab64dc0bb5337df13792d9a347baae0c0ec. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BER182244007.
Violin Sonata in B-Flat Major, Op. 5 No. 2 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): V. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9888544479410f160d752a45f0e47857aa34777ff33d1f24f0fe153ccfd1e7b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BER182244010.
Violin Sonata in G Minor, Op. 5 No. 5 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406938766028ee0d47a43e930b62ee22721480ebe267014b0322c94bf47c6d8. 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/BER182244012.
Violin Sonata in A Major, Op. 5 No. 6 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94b0f3368fe7feedad2a9d94a27e97856eb90a4e34c8171f4083acd09d9fd9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BER182244020.
Violin Sonata in A Major, Op. 5 No. 6 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): II. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa6c13aa027c4d3714ebe1ce8020df2e9ebbdc9fb4994222dfb183ae9915ea7. 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/BER182244021.
Violin Sonata in A Major, Op. 5 No. 6 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd1b95df7247ede51ee976d7f6c72b39503e2b8edb5dad61c727e9b78fab6ba. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BER182244022.
Violin Sonata in A Major, Op. 5 No. 6 (Transcr. for Viola da Gamba and Continuo by Teodoro Baù): V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7289f8adf4ab248e3c3933cd1ca5b7cd2e0f7a615c937edee56e6b70a454ad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BER182244024.
Violin Sonata in D Minor, Op. 5 No. 12 "La Folia" (Transcr. for Viola da Gamba and Continuo by Teodoro Baù)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1f5d0957ddb3dc1ee67893f04dccb5cdc5041888a3f629c443fcefb337cbdf. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BER182244025.