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 0x8bc66baf958654c47ea43f2249138e2c2397e5a311df71c88e263bed8cd40495. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c7da4ec-ef28-46e0-ad95-31980995cc38.json and https://artists.proofprofile.net/proofs/artist/1c7da4ec-ef28-46e0-ad95-31980995cc38.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 0x46b902219f0ca753682d8c2c6a1d106b4a0fd25fe093f00c48c9c5e58acf44cd. 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/USPMZ1207501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d180f1d9618e9c82f636373c519fcea8556a0cbb6975937e64fbf9e92f2559c. 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/USPMZ1207502.
Obras de musica para tecla, arpa y vihuela: Diferencias sobre el canto llano del caballero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1a032d0d680deeb76036e3a58218f7a69c1fbfc479ec135809de3a49e16f3. 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/USPMZ1207503.
Trattado de glosas: Recercada No. 4, "La gamba"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714396c47bff7f4fe65f2972eb892b2de3a3364a7184ce11675aeb6476dd042. 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/USPMZ1207506.
Una sarao de la chacona, "A la vida bona"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b76971b015f39b3717457318a057679d163f2e2347b241fc679dfa81a587e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USPMZ1207507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2276841d67a2a58237aaa2db6d92d61175f3ed0b393ffd5b5a28ae88c086a5d. 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/USPMZ1207509.
Ay, ay, ay, tres veces ay …! [Spain, 17th Century]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca13d2ae563c23550fb5dc11b086e25d8aa21217faf355eee55ba244c55aa32. 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/USPMZ1207510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba1db5176f0537cf572c9ae2913d35492c112c1e50ac81d1fb5c85bbdb8b93d. 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/USPMZ1207511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43464215f5d8a0c7259ccaad131777c434eb069578f763c28242bb7b3ab8f838. 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/USPMZ1207512.
Yyai Jesuchristo [Bolivia, 17th Century]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ca8e540b8261470ba867cf9ac5d64776b0097c50cd65a20c664f7afe7de81. 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/USPMZ1207519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aa821af4831e481ceea8a024e1a36283b9ca92789e794cdf92bc63ce17964b. 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/USPMZ1207522.
Dulce Jesus mio [Bolivia, 17th Century] (arr. G. Herreid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48e840cecb79a463a87438735d74ed60d504d6bb5eeb6967984090efd15c2f7. 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/USPMZ1207524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463bb3e8430a648d76c017261e6459d70936b840805dd114f7d944736ecc0a0. 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/USPMZ1207526.
Versos al organo en duo para chiririmias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd0e0eeb5024f58605492219621b0a41b0c00e9a71259f5d2f758c144e6d6a8. 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/USPMZ1207529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81bc4e5305fc23326b27c07b0b288a5ba00c961a72af2e49359610ee68923f0. 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/USPMZ1207530.
Obras de musica para tecla, arpa y vihuela: Diferencias sobre la Gallarda milanese
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaac6f3e39d751172026bc993e5b1b3f1472dadc2884886bf08d64e4b52116c6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USPMZ1207504.
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
Obras de musica para tecla, arpa y vihuela: Diferencias sobre el canto de la dama le demanda (arr. C. Patton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe017ab4cefd13929ed6406690783e54ab9ef1b8a1d8829bcb98d2a92f4ac2be3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USPMZ1207505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad5832a84a681f7f15ac13c7a1261089c7a3304815a2d6005bed58ca0e6cd96. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USPMZ1207508.
De San Jeronimo a 5 Sobre vuestro canto llano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd375bbb43d8eb4d6a380a67d5b2aafe1d5b26e23bbadea6eb0724066918759. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USPMZ1207513.
Villano [17th Century] (arr. for chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e88fd248476f76fd7ba4c1c3f912ace6758ff075194fef9f686d66fb952df1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USPMZ1207514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470092101eefaab95b678b01b4fd7e5b911603e0d42df05dcef4fb46f4e0281. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USPMZ1207515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbb239ad03fcff47854756eeb676261645f896ea19db95f9dd05e65906dbf32. 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/USPMZ1207517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263a814b1f360cbc7da9a13e4f44f8e84f5573dbdb0a5958ad7c2321135599d8. 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/USPMZ1207518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9bf419cb550501e8bb0b174cbca228e1db8578f57a18dedb0f19303eedd80f. 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/USPMZ1207520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953cebc420d3f8de0876f03381d661805a5cf9a86ea946f8085e1cf21ff9b528. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USPMZ1207521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6fb7afd38e873460afc83d8ef749dffe4947112004ef103cb534ef6e58e89f. 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/USPMZ1207523.
Senhora del mundo [Portugal, 16th Century] (arr. for chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3258a2cfd0df0d901fcf67acead5dd19f923c9644b0e88a296ce0422e5da9559. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USPMZ1207525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc8fa64073e1f517c8ae95eab3e9bc10ec24fcd80223f24e635a93e905e65d. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USPMZ1207527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754fcd358b7fee852d4b2ec7e4e9f9774d8c543a44cd2ee1f1e288202ce98a63. 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/USPMZ1207528.