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 0x31142a4ae2befdfa492fc2b5e659a9951368b1c4cebecd05fb978a2419e40c53. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce0eb6be-33aa-4b01-96f4-d2ec906b9c36.json and https://artists.proofprofile.net/proofs/artist/ce0eb6be-33aa-4b01-96f4-d2ec906b9c36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pro defunctis: Liturgy for the Death of the Baroque Area
Missa Pro defunctis a 5 Voci et 6 Instrumenti: Kyrie: Kyrie, Christe, Kyrie
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 0x28f762bc78545ab2c6ff818771d7d0ad93415a812629329390be830b0078fe70. 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/BEE020293314.
Missa Pro defunctis a 5 Voci et 6 Instrumenti: Offertorium: Hostias, Fac eas, Quam olim (da capo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6351a3c659ed6dc629258c5c5073d98265a4b88aeca766077339ea204a81b5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEE020293325.
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
Missa Pro defunctis a 5 Voci et 6 Instrumenti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fbb5eed0ed57b2e2aa39f9d7e5ee7a5f488a904e30f4e43d2a7a103be5b096. 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/BEE020293326.
Byrd: Infelix ego, Mass for 5 Voices & Motets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa0fcc0c68297eb93c2f9149a9f4eda1138c98e8b9c0c83f352da93d35a66d. 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/BER181301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3357a14b0e89e80044f904f281c8a4f23ba9f8eb18b2d98d21a55061a9567ed. 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/BER181301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe313d5ef46075ef0353a13007f6a30549659ddc73482d07aa5cc2c1586fa8344. 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/BER181301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570724c6869a1fa88af6fff03d7229b8d3e0a37eeae81538577e28e22930bf5. 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/BER181301409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3858cf31586e3467589462be5b50a6b52856810f2660eef62b6b482e2dfd65. 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/BER181301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56cf4ce29be9fb91a886415563b574edd1325dfcdca21793e301af30fe281d6. 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/BER181301413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa829f306138cfd7be71022a33923f83dc006347ac3869c3795203c4b5f564347. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BER181301402.
Felician: Il Sagrifizio d'Abramo & Miserere
Italian Music in the Low Countries (VRT Muziek Edition)
In My Heart of Hearts. Music in Shakespeare's Plays
John Coprario: Parrot or Ingenious Parodist?
Graupner: Das Leiden Jesu – Passion Cantatas, Vol. 1
Magic: Flanders Recorder Quartet and Friends
Sweelinck, J.P.: Vocal Music (The Secular Vocal Works - Chansons, Italian Rimes and Madrigals, French Rimes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec74d7b99c7658f05b5e5b79980a10df20984026eb8120eaa3c64bc068fa08. 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/ES7890801127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4b9963da3f5e25ec01802e5bf432482b5f709b3b874415a5d28a48ed4e373. 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/ES7890801119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f1518b59d69d7e8d3dd651768506f90cb36eb22e3b52392af6a960d5f29ba5. 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/BEW632225703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeaa4ab25cb4971b13922dda8d5216aa38efe7b0ab3daa30639f6ef6af995a0. 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/BEX601157001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797aa4c43785408c49c0c3199fd846f4bb35d36c32d35b0fc574df074e26ecc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BEX601157015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cfaafc9639d2e6804570b492e05382ece4dc7a14e6947f9f7f1dcab5729e62. 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/FR50X1739001.
Via Crucis, S. 53: Station I. Jesus wird zum tode verdamnt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18c6201de7517104d44e0d2b59d270df20e455c57eccdf297a67906ea45d767. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR50X1739002.
Via Crucis, S. 53: Station III. Jesus fällt zum ersten mal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca969bd3a2297d1d576a9c4203f0b0805da52ede9ead86e8ef7287580f2c8e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:30:25Z), 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/FR50X1739004.
Via Crucis, S. 53: Station IV. Jesus begegnet seiner heiligen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10407b594a880ba16fc00c585290046d5af7ae81e3b4cfa295255aed9be8cb96. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR50X1739005.
Via Crucis, S. 53: Station VI. Sancta Veronica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd839c8a39661c532893583ac1b1a19a96a4380b24e6a6ab1396d6d83ff92e5. 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/FR50X1739007.
Via Crucis, S. 53: Station VII. Jesus fällt zum zweiten Mal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f05096e2b4fc05ffd343c1b59ea5ba8ed758d94fc99ce94b1e15072d0687db7. 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/FR50X1739008.
Via Crucis, S. 53: Station IX. Jesus fällt zum dritten Mal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12f649e2e43a04d58e5ba95d7078df744c762bf988cb317db998d3dbb1e6427. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR50X1739010.
Via Crucis, S. 53: Station XIV. Jesus wird ins Grab gelegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2072688d92a3deddc76dbfe2ee488dce094d2b7569553eefa89a15698047b2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR50X1739015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a109fc7631e59bd3eb054944c754f405fc813d5fa3eac4c883d8cb532063c2. 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/FR50X1739017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31f586cdbd3214c86d47e94f699bba739a215857ee3e346d0e7ae1e075be6f6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR50X1739018.
Vivanco: Sancti et Justi (Motecta, 1610)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb48f8fcfe713f7dd9c1c3df23d4060d546a81aca87163a96b6d5f5e067ce08d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES7141500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a771b1f2bc3ff33eb778edf0ba4a5e3d560d647995a1684f124ad3753cd2239. 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/ES7141500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1241e011d2d7879e7b7b062a32124c81eff5f2057545eac53f756abfc2591bb2. 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/ES7141500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe248a73af96acd6461714494b7807cf31739d53ce14f82aad9941769865bbc7f. 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/ES7141500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1d74dd4b500d2fd14025682f4a27283e198ed0be4b8871b9b38eff29777afb. 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/ES7141500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49322198a4de443e1196c6bc466a270368d8a41a9e932ff12fa61abeb0c859ae. 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/ES7141500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18526f1204e8e99218eaef45ab3800f29ca1ce69932b2de26e24fe6c7d303dfa. 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/ES7141500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe654f09064d106eca841a1e7aaee19890eef77af5020a8a2a25f9cafe369a0. 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/ES7141500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f283f03f8abfd3fec20edfb15e0b0ddab226835c5c4b9b6e42815042864f022. 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/ES7141500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f6abf6887f4b555f1787dcb7593a4b9b49d8341b7c387cc85a3427d2f1f24. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES7141500214.
D'hoe: Once Upon a Castle (Uncover My Secrets)