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 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 0x4d8b64ef72b57a01d67e07cdc96d69e8db37eb3a3ec65c359701f336b3821e56. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4bd254e-f8c7-44f2-8b74-60cb8d464080.json and https://artists.proofprofile.net/proofs/artist/a4bd254e-f8c7-44f2-8b74-60cb8d464080.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Música de Concierto Chilena: Obras de Cámara y Orquesta
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 0xbccc56c5131d6104143546a5222bfffb589548ca8d216d7cdeaa26e7497f0ec5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202447174 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ffe49d9ccc4df45a418b9390a9e3e67e242e997aef1018caf9aa74b734bfae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2431632 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dc67a277716fc4e4bbab7669aad68a05bdaf974f4145d023beec1d25480f45. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789440 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d63c536d282822019fdae708c6b0a808a10d86689e6372494b5c6a79fcb79e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789493 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ea35f1d974ff3b64ef29e4b08bcb4d31e20f2b67515b5d54ae619cfc704ec. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789611 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee49e9c2c09d912ec313197eb778b277473aab88410e610cc9806d728b83550. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789656 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca457609afd21d17698d82d563a47b29644188b0204a368bdbe373e20dd34ac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789659 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc4b3f169db8d5e228a88b1c6de6103a6f7f06d9762495a9b9aecfacf7d96e0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789662 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfdcd64659bdb372b20e664264158f27fcd50b38f2167fff41d43336d52d32f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789665 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655fa2894e2584401bc59b84d6146516f2f44b42c5402e2dcbfe8ae23475f23. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789670 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da8623242f6e8fc6bcf6b8ecd4199ccf3014558f970927049856942e2e9e9af. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACW1789672 — a six-check JSON result.
Collana canti per la liturgia: Novena di Natale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00527f60143e415b4b2d1e2cc56009b20422fb619371c5f93d69a72605c22fdf. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400173 — a six-check JSON result.
In Festo Pentecostes (Holy Music Gregorian Chants)
In Assumptione Beatae Marie Virginis (Holy Music Gregorian Chants)
In Dominicis Quadragesimae (Dominica V in Quadragesima. Gregorian Chants)
Dominica V in Quadragesima: Eripe me Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc590ffb4abe9af8bcca3bc2a694bdb349b04fe69383f9bd60118f5df07ae8f5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400127 — a six-check JSON result.
Dominica Resurrectionis (Holy Music Gregorian Chants)
In Dominicis Quadragesimae (Gregorian Chants. Dominica III in Qaudragesima, Dominica IV in Quadragesima)
Dominica III in Quadragesima: Justitiae Domini rectae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c553eae7721973de1bc5a06a2d980a7fb8160842fde2d6f7023716526e62c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400109 — a six-check JSON result.
Dominica IV in Quadragesima: Laetare Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8889b1b9e0f672c604d320d39d5f6c7b9d12118642ca6f57ffe534cffdb72185. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400115 — a six-check JSON result.
In Dominicis Quadragesimae (Gregorian Chants. Dominica I in Qaudragesima, Dominica II in Quadragesima)
Dominica I In Quadragesima: Invocabit me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6ef8cdf13f181f96f57a6984a4f5f34dad1ddf53f5e0af5309b3366aa7500. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400085 — a six-check JSON result.
Dominica I In Quadragesima: Angelis suis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1818e5210ec535fdaff0e30e8cb8713601f3f7288bc5b962e3fb404fd79809. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400087 — a six-check JSON result.
Dominica I In Quadragesima: Scapulis suis obumbrabit tibi Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f07dc6e2d82e085931cdbb291c62f69622e79514503de551aa704b01a731d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400089 — a six-check JSON result.
Dominica I In Quadragesima: Scapulis suis obumbrabit tibi, et sub pennis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f3c992d09ee2d156eaedaee2f85d9de419108ab1a828866ce0de294669cf08. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400093 — a six-check JSON result.
Dominica II In Quadragesima: In via angelis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6de554b9cb12bea2f7d81d7980801675256da37d790758ff6279e011d7c4d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400097 — a six-check JSON result.
Dominica II In Quadragesima: Meditabor in mandatis tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3064aa4d8c3f5372328a6f257020943bef4aafce0855df55d0c63f43ed8e419. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271400099 — a six-check JSON result.
Novena di Natale II (Christmas Music Gregorian Chants)
In Nativitate Domini (Holy Music Gregorian Chants)
Novena di Natale I (Christmas Gregorian Chants)
In Dominicis Adventus (Dominica III Adventus, Dominica IV Adventus. Christmas Gregorian Chants)
In Dominicis Adventus (Dominica I Adventus, Dominica II Adventus. Christmas Gregorian Chants)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c116d2fe4d3a8afacc947785414b64e436bf27cf9911472b58baec2b9d29415. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA092406591 — a six-check JSON result.