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 0x29cba5cb0073c0a9c708a95d43c1501f3156f40b129429de90ad381288c8dc13. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b68ffc9f-00e0-4e88-b6be-10c5158f2905.json and https://artists.proofprofile.net/proofs/artist/b68ffc9f-00e0-4e88-b6be-10c5158f2905.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Renaissance Music from the Courts of Mantua and Ferrara
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 0x37d99fe93f1240ce78db7dc7016f25b6927a74ce31d79cc5bc050b4793ceb139. 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/GBLWD9101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c485b541ef2c53fb09ecb5921b060a940117b9e45377f434238e5130db99129. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLWD9101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f5860001b618030c980b54f7ebb387c68dcd81bb50c0bfa289356f5e2f83b. 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/GBLWD9101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8853ce61641c0605c64910c1ece68ec6787c1b5a9b645e205d3f766447eb2184. 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/GBLWD9101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd68d4a03bdd00e9191e5e508926cd5c1892b9f2e5c3ceb04d8d15139308d57. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLWD9101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633f48ec69976eae718c7e4d0194dd40eef1f6c8e7b6e7dd00c8971b25f3c8ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLWD9101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612bf44b0e84a757a52b849492c14bba489c55b8eaae43c28e390445de229f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLWD9101007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6f50e766975118c7295f3288310530eb309317e1f72468a85195501d87b1a5. 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/GBLWD9101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3598dcdfb303a31beb4e797f7dfdd3fac4ae92c93bf5be2745802974eb560e. 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/GBLWD9101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4def45e6d0caf7a472622629e5cf3e4260f78f9a34a71325e8b7d566f7cec331. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLWD9101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca009268434642c661f0c2ec54c26abbb1e4f0c4bf24b9330a9642fabd41d8c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLWD9101013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf978b3a228945aea922cdbca3b0734a43c7d30c612a20620bb3b17d24d9890a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLWD9101014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258e52b347b6f2c467e2dcefbbbb8a4281ce6d44381d4930e987afd1382bffbc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLWD9101016.
Circa 1500 play Renaissance Music from the Courts of Mantua and Ferrara
Renaissance Music From The Courts Of Mantua And Ferrara
New Fashions - Cries and Ballads of London
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259ee24e457a4f727123910d9be61e2017ed05851cb9713f84622d11e7be4b6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBGK9248710.
The Flower of All Ships, Tudor Court Music from the Time of the Mary Rose
Westron Wynde - Hey nony nony No: Westron Wynde - Hey nony nony No
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56062277adc9e6b250689f01fc1c40b77849c44fefe7e6580c9ce639db96bb81. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBBGK9544802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75badd68b120e034dd72f455ec75102bbdc36db8b1be3139667dfebdc64ef4d4. 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/GBBGK9544810.
My Lady Carey's Dompe: My Lady Carey's Dompe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9bee215b88500fc9b8a7a6cb719efbe9cfc44ab1b09e239a98955305eef1fe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBGK9544812.
A Handefull of Pleasant Delites: Elizabethan Ballads and Dances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528eea1920a08432eff59f4313ebe8379fb6190261da3aaf284bdb78967ee769. 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/GBUM70905746.
Passymeasures (improvisation) / The Lady Greensleeves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ebed7d5f55a722ea4c5169a188e9ea48714f9690fc48c2fb19d1957c82686. 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/GBUM70905761.
Dictionary of Medieval & Renaissance Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee65676de15cc0ad9a5ee9f56a71408adef885076101d7f46c76cc2c92c340d. 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/MX2831000728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34041e30aec1e48617eef88b0f7f27e83481becd5deb77a9910925d6c1ef7720. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC8903169.
Mudarra: Libros de música en cifra, Libro I: Pavana & galliard d'Alexandre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34041e30aec1e48617eef88b0f7f27e83481becd5deb77a9910925d6c1ef7720. 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/GBAYC8903169.