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 0xb89c8006eeef25472d443e649e30802f60b282a5f1134d3670af6f739b3f98d6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c668d2d-9f24-42f5-b75d-dcbdae0459bb.json and https://artists.proofprofile.net/proofs/artist/2c668d2d-9f24-42f5-b75d-dcbdae0459bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dies irae, LWV 64/1: Tuba mirum spargens sonum
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 0x58680238a2600b5bf5e2012f5596af36f79796d07f17f37eb68bf50f38128721. 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/FR50X1844402.
Dies irae, LWV 64/1: Rex tremendae majestatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a797097ac96938a9f79043c124a3a5a97d528a3362dca83b1fa2259b76806b. 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/FR50X1844406.
Dies irae, LWV 64/1: Juste judex ultionis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b083b876c0dc08d6aacbb5789c6126be678ab48e06da48e817c2cc24e7fcfe. 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/FR50X1844408.
Dies irae, LWV 64/1: Lacrymosa dies illa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf017315f67eca85e4896586086583ac829e918d22b1c4e3cca827b0ef881a. 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/FR50X1844412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe035a073c0537ce1768966fbdf79629754822557670b59acefaa8ae6bf4a0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR50X1844413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268fe687479686c08ed2c45ecc830811674fb77fce740e3baf72fa330dc71ee1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d6314bbe951ab9d1c1b959abfd73a551260de85b96e129da077a96527fde0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BER182446901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd6fe7166df7c5950b3c101e43ce8c0161ecc4ae94775ffa41d11389ede13b. 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/BER182446902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8adbe440fe722545e0e05894a4a4fcbb41547534efc332bedb0501095d803. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/BER182446903.
Dies irae, LWV 64/1: Dies irae dies illa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44f03251ae7d833fdc8f55ba7b3f67ef6024799a58e4173c202970e525a9e4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844401.
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
Dies irae, LWV 64/1: Liber scriptus proferetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58416f6b031e3e5135bcaa4920a3f447b0638e73a3007f3ae475d71894936cb4. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR50X1844404.
Dies irae, LWV 64/1: Ingemisco tanquam reus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe154bb929c1b96eb6d488fdefd1b800608a402fcf237468190a28a201521894c. 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/FR50X1844409.
Dies irae, LWV 64/1: Confutatis maledictis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e12b47bd7663f0f0683c6478610cb80ce890d99de62893b1726315ac1c9c5. 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/FR50X1844410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf2db6ea5a93dcdb2e56f903015d12a532ec08387063c89b5e1866ad54dc75e. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR50X1844415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa02f53b6c261461cad6f1f79a5fa9468d5548f2d0b74c983f30e40f53fa1606. 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/FR50X1844416.
Charpentier: In nativitatem Domini canticum, H. 416: X. Chœur. "O infans, o Deus"
Charpentier: In nativitatem Domini canticum & Messe de minuit pour noël
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa103b1af179de62a7f6fd4503d3b415aa95ddf5f2f53b67b4efca017940ece4. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRZ200100583.
Messe des pêcheurs de Villerville: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2f6df9ffcba347563cb706fe0108da00a07953f08c4662c79692e6c86e568. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BER182446904.