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 0x6764606c9a0c75427c2a44b4c8d668990cd78e6daa11bb277e98eb9922a5faf0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e06bc867-748b-404e-969d-8e61c66043a3.json and https://artists.proofprofile.net/proofs/artist/e06bc867-748b-404e-969d-8e61c66043a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Strings Attached (Swedish Folk Tunes)
Caritas abundat in omnia, Hildegard von Bingen (From The Lowest Depths To The Highest Stars)
Lo gens cors onratz, Gaucélm Faiditz (Of Great Beauties)
Si ai perdut mon saber, Ponç d'Ortafà (I Neither Live Nor Die)
My Vielle and the Rest (12th and 13th Century Medieval Music)
Aissi quon es sobronada (The Chosen Flower)
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 0x51347884e86a29cdfe3a5132e0a6b2236df6289b2b457d873a12f78df9cfd489. 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/QZNWX2216438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd5e4fcb7545a7caf2aadd00ca5b581eff3e856b372b7eeb6341eade6481bbe. 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/QZNWX2216441.
A chantar mes al cor que no deurie (For There Is Reason To My Pain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e27c268ea364bc19d7c0762d804b7af9ccbdd6eaf951d3960e765c0c15b93c. 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/QZNWX2216442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe103cd22aa95095750999536be92a2dc023310c5f9662b8bcab324f6f6d5d734. 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/QZNWX2216444.
Un sirventes novel vueill comenzar (I Have in You My Good Hope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51223997c03e315ba923668b0035a94418508118fb8f207801ed4cc579f483d. 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/QZNWX2216447.
Efforcier m’estuet ma voiz (Hoist The Gall From Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dccb9d81ab0b7cb3cfed91431d5a37722894e88b48b05cc6916b620680f50b9. 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/QZNWX2216448.
Edi beo thu hevene quene (Blossom Sprung From A Single Root)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67cdb257a2e41d66ddf194193bbd60374b322f02493e54e7f1ffd53d5e618da. 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/QZNWX2216449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7351e3cab2e12555321e0c00827c3b753a5f2c5a37b31887cc594bc06d72b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWX2216436.
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 0x97ae7b2b3d012d639c69d3a8cbbd2d29a4ffeed56125d096afe41a72bf60824d. 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/QZNWX2216437.
Lo iens cors onratz, Gaucélm Faiditz (Of Great Beauties)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f736e6c99241f45a249b126da1edfa55a5972aa21e62011be2b2b6d59e71f0. 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/QZNWX2216439.
Amours qui biens ses enchanter (And You Will Enchant The Enchanter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85ef72aad0a5f3ba8216dee73ac8f16ab9d4484205caf23c39a64d4a93cbccb. 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/QZNWX2216440.
Dregz de natura comanda (But Roots Is What One Keeps)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42b37327f0baadc0be5eb45be7c8f3060c2ec8ee3b31a8e89f114ccbfbdd55. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWX2216443.
Mout m’abelist quant je voi revenir (When Winter Returns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565f0573260a220cdeece5f20639a3a151281be44aa3250963da13108eb657d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWX2216445.
Volez vous que je vous chant (In The Shade Of An Olive Tree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d616d552aaa2b4922d123685b5da03be60ba489bbbf9a9404a2b68a60792a75. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNWX2216446.
De la gensor qu’om vej’ al meu semblan (I'll Go Far Away If My Heart Wants To Follow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142351df90a2770c764410b33606df1f583246fd4c0734348e98aa1f4da6edc2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWX2216450.
Bonus Track: Propiñan de melyor (Cancionero de la Colombina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df5f3867223d87111aaea1f8296378495654d6c9ee8fb26fc542c056334a66. 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/QZNWX2216451.
Part II: ...Twelve years ago, I saw your face in a dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f4fcab586d4de7d1624c30b3f4f924d2786ad99c4a313d3dc0f1a355f1420. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:29Z), 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/QZZ7V2511654.
CSM 18: Por Nos De Dulta Tirar (Nunium, The Wizard Of Leyriath)
Leyriath, of Music and Legends: Cantigas de Santa Maria (Alfonso X)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb01f5dfdd379581cc1ae3e76a1d8feb9b498c21d024782bf2c31312b58a56f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2124912.
CSM 400: Pero Cantigas De Loor (Journey Through Liz And Lena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52390abcff944fed7eb5d0329ed190e95e572f7d2b8894868e1e1b4bfa8f2ef3. 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/QZK6N2124913.
CSM 37: Miragres Fremosos Faz Por Nos (Chasing A Dream)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7c0499ff5f78f6b97a97228ff8390098e3a26f0ecebaeacf674888f3b462a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2124914.
CSM 340: Virgen Madre Groriosa (The Muse And The Bard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f2011b5d88deadcd4c20e3848e5ef4dc50a7eb09b3334f4e9d86389548b7b9. 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/QZK6N2124915.