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 0x6254534fa5abc53148940c30ba47c6d02fdb4de6996babcb06e5f13bb78aec8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/927ebcda-bb11-4e93-b7f5-a6114bb35c44.json and https://artists.proofprofile.net/proofs/artist/927ebcda-bb11-4e93-b7f5-a6114bb35c44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chamber Music (Renaissance) – D'Estree, J. / Johnson, J. / Ravenscroft, T. / Allison, R. / Morley, T. / Byrd, W. / Dowland, J.
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 0x71f3a866b750fc0534a71e9ae945956655dff4974b15982346fa24b743bbb03a. 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/USKC60711768.
Renaissance Music (Instrumental and Vocal) - Le Roy, A. / Praetorius, M. / Bassano, G. / Phalese, P. (La Rocque' N' Roll)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6579cc0657d86800dee6f5204b41f4d4c93fa92734ae31f9df42fed162e54c6a. 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/USKC60710257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc97e67bae707dff1c85e8bf5c90a99174a6c89306a0c29a1deea7c51964ce2d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:25:28Z), 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/USKC60711891.
Christmas Music (Bright Day Star - Music for the Yuletide Season)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef210214b98157ab028564f27d4dbebff28971fe7b1661cf29e06deac6567d. 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/USKC60713072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4926470f8bc1489bffdbfc471a41e9939bbb7fdb64f792847875519aaab679d. 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/USKC60713076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106c080a80e704d034cb19541af8da5c8f694d9f2470f9a33a0bb5020ca6c3d. 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/USKC60713078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636da3f385a6d63c94bbe7acbe22f1070435d8464e125529182e673c5369ccf0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USKC60713079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0506a49a39c391c0396a46ac8191e3fa8cc48a98fe65dd53a92a4e74e448a858. 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/USKC60713080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84fdc90190fcda4936411ee4ca8a9f7db37a00549c08b77497078cf60794018. 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/USKC60713081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a62d2a5f512279e7d9dc62a61e07a9deaabc68efb9eb61c58eb30a1423e0df. 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/USKC60713082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aec5499e921b5166fb90b8cbf10b633b8053696618fb04dd36e8d48202dae0. 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/USKC60713083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274cb0e4ef9b0cb34205c765b0b513e658be56f9ae0ce234457cdcd0186b0bb. 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/USKC60713086.
Morley, T.: Joyne Hands / Akeroyde, S.: Jenny, My Blithest Maid / Nicholson, R.: the Jewes Dance (Tunes From the Attic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb5f8eac9f7d135fb9930c08f0bb606bc113337efb0a1f1da48ac48bf1bc88. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:57Z), 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/USKC60713195.
Chamber and Vocal Music (16Th-17Th Centuries) – Reade, R. / Johnson, J. Ravenscroft, T. / Morley, T. (The Ladyes Delight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ab802a5556b844a77de9c2cff7a200341986ef556960fb2ad768a26c59bda. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USKC60711965.
Chamber Music (Spanish) - Pisador, D. / Ortiz, D. / Torre, F. De La / Mudarra, A. / Guerrero, P. / Encina, J. Del (Adio Espana)
Adío España - Romances, Villancios, & Improvisations From Spain Circa 1500
Liber Primus Leviorum Carminum: Alemande de Liege
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbbbcb19464af770e4e1da38e61fd71dbab765f45cac9812fc7493cf95d62f5. 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/USKC60810140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52b7c7339e8fdebbb762f76ef9b771863ef381e28a2125bcfb1b7e35cfed2a. 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/USKC60810143.
Terpsichore (arr. for chamber ensemble): Branle double
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4c5034afd7879eebce19cea52f0a89a2ba273fc12d1d0aebe3c55c9b06c6c6. 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/USKC60810149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8c6d030e4e3d85de844d3b4957b9cd3442af3b03386bb3c3cff735c04ac2d. 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/USKC60810152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a43254bab12d3ccd3b20cce58f3dd5fc62a4cfbfd264be411d66a187a07df13. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USKC60810156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde05b2612799f06a1264b83d8a7400460c643b6d2f7fb5ee4c46ab0796d4fa9e. 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/USKC60810159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171f053bb7c4011dfa36ec1cf2118c5ec8b56de91f2eea058d7fd3fbd84e8c0. 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/USKC60810162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5374365876cc1b693d84489afc742fb97a1c69efe3827aa90c65260b10a7755e. 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/USKC60810164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab468ee992e9158840c98859b8e9b5c181263f1826e6f32a1ad9da8128d134f. 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/USKC60810166.
Caledonian Pocket Companion: Pentland Hills
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d241be54dd37d8573369012925c9f2c4f38e9d727fa384482a48ee5b7cf026. 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/USKC60810169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e484ba15c057739626d608f3debf26855a47e9362ac3df7cf011b1dfdba260. 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/USKC60810171.
The English Dancing Master: The Shaking of the Sheets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0d1aca539e8fab7921eccf34d1e3c02e33ae8d7cfc000f3c09b9ad160ec25. 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/USKC60810193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0716226f761f873c3b2c49f553a666f0037277a1a7ab0e7171119ff911d5b1d7. 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/USKC60712144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f7f3923f72f5d15282e1d11bd87c2c462bf950491a2a2d1c63e14359b374d. 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/USKC60712145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fae4c43e6d46c9d146245332f4e5c19ca78a0fd17332d2e138a6f50db65380. 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/USKC60712147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e1308d80fd6631ee742434c2b953613526046337c4c0f253ddf5a9a25a1e1. 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/USKC60712149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d90af6e41ed4d873e900d6a0345611914ab8d611adb15a39f407c6a541308d2. 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/USKC60712151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604e7520721dfd04279e4eab2866c4306d33b6e2faa32a01717280abe81475d. 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/USKC60712156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821efb751aa63922a64c599fbbe7352b208490f21f0267e896c35d3e2a12f456. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USKC60712157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3908a88cfb88559c968af7ac27e9606c60f432621307ca828764a4f4da6bf8b. 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/USKC60712159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b95abd93cab116808623e3eed5d4a7a4a1befb60f802b558442dc3ea389a4fc. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USKC60712160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca444cecae16bfa678361457f9b57ada26fdb928a17a937612bb2da4cdf4bb. 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/USKC60712163.
The Food of Love: Songs, Dances, and Fancies for Shakespeare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6843facdaec1f84b7dcf8638f83433c35d1d33086804367173b1d759d34b5296. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USKC61923401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3479175091b716f115398f3b945031daf3793be41d4a1a49d37c0ef659853. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:17Z), 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/USKC61923408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e175686ea85740a504b5353e3fd24d975114e94bc56c559c7609598bd3c601. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USKC61923421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd92ea7c71abb35e64b75b9e2d4e7d3b1f64fdb6944fcc0bc404997e6b817d21. 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/USKC61923422.