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 0xf83281941434d5362602e10cb511566ca7386759a4da1d5ee9cc457284d08852. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/339f32e0-40ed-4f4f-9c67-b3338cdbfb09.json and https://artists.proofprofile.net/proofs/artist/339f32e0-40ed-4f4f-9c67-b3338cdbfb09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Meditation Music: Meditative Music Across Ten Centuries
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 0x5b29ddf54cab0b34a6a50512d64d03af61c9ae66596a35ba5c9369930165e0f0. 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/ES7141500235.
Le vray remède d'amour: Virelai "Liement me deport"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d3487fcf622023b331ff9a2ee27c2cb1187a41dd3d5b6a1c1d349c5261415. 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/NLY331111879.
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.
Le Jugement du Roi de Navarre: Ballade "Tres douce dame que j'aour"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5343c53599e8165601182c45f9d32ef064ae544622c2e127d8683e88f07c2933. 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/NLY331111885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dd8e0eb26ffda8b390b7caae74da3060ab22827aef6309297757d98d2290f7. 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/MX2831000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6748cf6e506f1c2f1ede3a8068badd2f5ff64b81e6f4b9d80a65c00f4ad46705. 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/MX2831000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d44b6202e990f8f847a7c32aba9cf09fca5e91cdd2d1176a07f022ff3e175. 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/MX2831000286.
Puisque bele dame / Flos filius eius (Medieval Fiddle & Voice)
Dictionary of Medieval & Renaissance Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3879188ce3850751558d1cdc296760b97f3ed2556af292eceb111689f8625a9. 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/MX2831000691.
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
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: Ballade "Je ne cuit pas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd35dba8b1b536b3f965c444c26b7ba903ad87933e88a81987288842964766. 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/NLY331111870.
Le vray remède d'amour: Rondeau "Doulz viaire gracieus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc74edf8ada89f2ce74d0e87a653b35f8c75953e1cf1a8b67269bdfd33db03. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NLY331111871.
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 Jugement du Roi de Navarre: Motet "Plange regni/Tu qui gregem tuum ducis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86038a99c724541012fccdc2cc3b8a0fabdd301c454b10f75860ea51751897. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY331111887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6abe95c984f6a68bee7bec20e20298e42e74dd0366a203825bbfc1131c124d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/MX2831000648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ed2c9e3ad674272f20b985771ca6c101b6836cb690d1160f6de5b131eeec60. 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/MX2831000649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee834921cf6e7ae394b50049b9ca97d2ff1b3112de356c046559f891f282c75. 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/MX2831000654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d7d11fc3d556f45c9aadbaa2d6d36a090a8ba02ca84e9c0c1d5417bdcdb71a. 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/MX2831000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edfd41565f3fef368fd8db799f7fe58ff8a768b4afea3b99de4f209d451e055. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/MX2831000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da8f0c84b1fdf1696811e87119eef6df1e0f4be348c48f606d981810a69ace. 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/MX2831000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126cd89f2902fe3e4f2bf7c21dcc6aecdd669f1bd9766afbd0810c3a4bc22e8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/MX2831000304.