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 0xd1a8de8093ff9cf8d758533687b8417ea5adbad7559e7536ef40b932bd1ecbff. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa2e749f-f1d9-4bc8-8bd9-56d2a6c684f1.json and https://artists.proofprofile.net/proofs/artist/fa2e749f-f1d9-4bc8-8bd9-56d2a6c684f1.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 0x02782f51f9191fb1026919b4eb27457ed48572464d1bce28e52a4eb2af19aa3b. 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/FRZ092000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b04d012f0645bf9f65dd4ded52c1fadaaffb94c8f6202f148d1857f6bf8207. 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/FRZ092000580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b0d48a0f6ade65d91ed84c6fd22228cd09cb07203e0593089e7c4777f6e1e4. 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/FRZ092000563.
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 0x7443308076a75721668ffa60be524212a606bbe06c96ce69ca8af6e9c255a71f. 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/FRZ092000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d134797b95a2237910fa3184d933dfbf000cf03a0c2580be5eb39c23b530e0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ092000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28113da97461775c882efd32fab50edf022eb1abd9a9420ba21ef03af67f8a47. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ092000587.
Dame, ne regardes pas (Medieval Fiddles)
Dictionary of Medieval & Renaissance Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941a5cffd48401a03a5183902f825c35f8e74edd34887d3a1f250993dbeba41. 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/MX2831000690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c66bbcc1d378a4b2f4f5b689a2f9314dfffc9ed94d55b23077d230ab2328376. 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/NLY331111847.
Messe de Nostre Dame: Gloria in excelsis deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eac926e4460ee3d441684116ff8d3906589b6561ce4d6a17df3e53a0532185. 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/NLY331111848.
Messe de Nostre Dame: Credo in unum deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9177dc47ce58ac72eedd845725f9ee4510a5cae68fc26d14b12d2c74f01ce3. 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/NLY331111854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa567444dca38c223041cf51b8412469162c83c64a82c8ec88b8c958b48ab40. 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/NLY331111862.
Le vray remède d'amour: Ballade "Dame se vous m'estes lonteinne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363f68fa7763278c910d99f4c80100319f32ea5fcd41a1a4537920f32735533f. 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/NLY331111869.
Le vray remède d'amour: Motet "Felix virgo" - "Inviolata genitrix"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1083cf4a117e295269156867605d9e9ac009afd5ed01de47daa012c25d15f1c. 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/NLY331111883.
Meditation Music: Meditative Music Across Ten Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514184f0361a73930ae2ef9a7e068d5f25a8eddc7b35241d373568ce7d73e85c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES7141500231.
In seculum viellatoris (Medieval Fiddles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf2537b6b9f3288c15b48794c4a299ecbc98e67f496622282989f34000e4a7a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/MX2831000689.
Messe de Nostre Dame: Sanctus & benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23de357ea0b00d3eb1765a9bf77e50342db7d9b6251d2df093c3ab6ba32dd7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLY331111857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714f7f47d0c255a75be0564cc15c8a23e9833a1bf82aa4371f4f3f84b270373a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLY331111859.
Le vray remède d'amour: Motet "Amours qui ha le pouoir/Faus samblant"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d32da32c6c4fda0fd75e09df78b9ca48339c73cd443860e76a9f15570eb307. 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/NLY331111865.
Le vray remède d'amour: Rondeau "Ce qui soustient moy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054202c083d8774784294b4e8079b08795631c925ca3652a8ed4a08427d464fb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLY331111867.
Le vray remède d'amour: Motet "Christe, qui lux est/Veni creator spiritus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f41d80baa46979677ea6419f926124a0d8921f8db0c747a25a15a608690c97c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLY331111872.
Le vray remède d'amour: Rondeau "Puisqu'en oubli"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53b45cfe1ad4f43eeaaa97eb011c4ad757e4119dda34e84b91c794139463976. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLY331111874.
Le vray remède d'amour: Ballade "Dame ne regardes pas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f976e9e4a5ec6f7cd768b0a292cc5fe19046ec5a28b2ffe7089b639d215c64. 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/NLY331111875.
Le vray remède d'amour: Ballade "Doulz amis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284fab16c64d8227221f5b2b501714a9051a4716bc49d4cc2437b4ff67abd447. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLY331111876.