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 0x3b58280a28d3a6e082394c80621eb092dbb76db77659ef7fb8c3314f7f439ae3. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c4deb48-61d1-4763-9415-c94367f09345.json and https://artists.proofprofile.net/proofs/artist/6c4deb48-61d1-4763-9415-c94367f09345.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x55a9a66eeb7861593da5f5e8ecf37180cefbd96ab62df9e9c2cf9b2d1c804c02. 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/CAJ720523708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c09c7bd837249e2f0c053d6b54b055f1ea940d7ec76970d10e8fd0daad2644. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720523713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755509a5d6a0d7adcc8ec5faa7e0fb50ed5509ec956aa6e5122355dedf4cf2bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720523717.
The Fairy Queen, Z. 629: Now the Night Is Chac'd Away
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431e87b3583049dcd8cf1afa1ff7e144cd3590090d08c41d45ced7328a7e8e2a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720639801.
Come, Ye Sons Of Art Away, Z. 323: No. 5, Strike The Viol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151b1a0ed61f386a0320b6b33bb7c4ceaad145442ecfb0a3a750fd7b6dda6f0. 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/CAJ720639804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa31f245f228b468480b864549a43f2c07a4feeb96823afa81edf488a741d51e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAJ720639803.
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
The Fairy Queen, Z. 629: See, Even Night Herself Is Here
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b58b08fe9d0d1e18d96d7579ee17c13143479bdfe103308a1a14b913fd215e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAJ720639806.
Dido and Aneas, Z. 626: When I Am Laid In Earth, "Dido's Lament"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32402753916700984f117aff53048ae1afa2a4fb5dc2c577d64cfe3df9514b7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/CAJ720639808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc989de556a6c5ef1b537a3f61f5464fc19b75cd6a3e4f86e140f9f6cf4c7e94. 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/CAJ720425801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2bc9e393a509437553049ed8924e32f435bf8d65dcb2a5964ff34db8d57bee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720425802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbac985a571c9114060628ba4d5ee575f17ebc9c166268f2d7a642638a3526e. 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/CAJ720425803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ec4edf365a9b061b74ba90a0af8c826a42ebca3ffedad35bea28aa85c2e72. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720425804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d513ddec03771218f7bbab42240aedd553add57e9a10b647b8276812290a3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720425805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba6f8e3e82a1a6ae0ba5d57b2115a40618087f4253527f82157136344b3b74. 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/CAJ720425810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb487637bf9fb6391483e22f4cf72ec8dbbb323e3a417f4e9d5f889ad5b5c661b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720425811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d768524f5678f259a2d85b37ca761a0ec4b06cb6834f073803d659a0fa7656. 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/CAJ720425813.
En montant la rivière (Arr. by Susie Napper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b944b7dc50892e6a3a6c192c3c3ebc0864166055cdfa10eac000f82e91785. 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/CAJ720425814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96083355ce685f10fb29fe2f85c7290feace5a660ad08296f11475c6ba333734. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ720425815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be032dc10fee559db327034645ee6eac471ea7d346d3135d3053ee63fd74c16. 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/CAJ720425817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624b86466b0a5e9972faf94f48529524312d9e3bdbf232d582e5560ca65f167. 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/CAJ720425818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1482ba156a87e022d5c52b91e2945a3b9473717fd14c01084464669c059f018f. 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/CAJ720425812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12d30d428954f6d2d86a37123f0046c346629994dbaf4ffd523c35844b0a343. 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/CAJ729919012.
Ding, Dong! Merrily on high (Arr. by Susie Napper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364955f7806932c0ee875323551dd2c73547f437f8fbd50bc1ca5dea5226846e. 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/CAJ729919002.
Le ballet-comique de la reine: La petite entrée (Arr. by Francis Colpron)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72478fe4e14cc8fcab15f1c93cf0eb68bcc162699bd5744e5cabcc247d1b6544. 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/CAJ721165803.
Divine Karina : The best of Karina Gauvin
Frutti Musicali: Solo Instrumental Music From Italy
Sinfonie di concerto grosso, Sinfonia No. 4 in E minor: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1261b7babd6d7e8cfff9f78f60b66bc0a8778d913d0c94ee61d5f2df39dd35d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAJ721160601.
Sinfonie di concerto grosso, Sinfonia No. 8 in G major: I. Allegretto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c34f8f70444920c261e8dfecfff6d03aab27223507b5fa0014b567e9a5d911. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAJ721160606.
Sinfonie di concerto grosso, Sinfonia No. 8 in G major: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e3bf3d8213bb6a3cb5bd41d1a76a82586634ba8b9c5732db41399c3b4e84e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ721160609.
Oboe Concerto in D minor, Op. 9, No. 2: I. Allegro e non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf89aa104b4353de6045450f7584df6104f3044949ceadabc890c9e9d389797. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAJ721160610.
Oboe Concerto in D minor, Op. 9, No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694251833cec2e103923ed8e45491e552f5d9db895c00b736736ec3c077b67e8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CAJ721160612.
Dieupart: 6 Suites for Recorder and Basso Continuo
Suite No. 1 en la majeur, pour flûte de voix et basse continue: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf49b9a2c91e470966edccdb2331d7791df90644833fa6900f8cce19a91699c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720123401.
Suite No. 1 en la majeur, pour flûte de voix et basse continue: II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7a68b4bb6ce62f23d284e33c86cc2bec5a24bb44f34c78e012f29edf68e72b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720123402.
Suite No. 1 en la majeur, pour flûte de voix et basse continue: IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd75dd5c3aa1e506244881e90b4561ab8829e002d28ae4a5283d1abda14dab1b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720123404.
Suite No. 1 en la majeur, pour flûte de voix et basse continue: VI. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b157a57ffe0dad936da94ecabf6192d729a2d496aa75683b8d3b1b3850dfa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAJ720123406.
Suite No. 1 en la majeur, pour flûte de voix et basse continue: V. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc299f7d0664c686641da8546bd88f7401d312cefac6af50c4483660c4a37de. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CAJ720123405.
In stilo moderno: Frescobaldi to Vivaldi
Bravade: van Noordt / van Eyck / Schop: Music for Recorder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead49541e4765ad22e14ee75172948190fb36b106ac2e3a0074e528a19dcdff0. 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/CAJ720016001.
Hume: Captain Humes Poeticall Musicke, Vol. 1