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 0xe337fbfa04715b8c08acd46170fc8c5301d86e4453cd720c53a4d79b2eee4e2b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41f16357-4efa-4bbd-8f73-1a48fe1e60b2.json and https://artists.proofprofile.net/proofs/artist/41f16357-4efa-4bbd-8f73-1a48fe1e60b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Estampie: Materia Mystica (Homage To Hildegard Von Bingen)
Thibaut De Champagne: Seignor, Sachies, Qui or Ne S'En Ira / Guiot De Dijon: Chanterai Por Mon Corage (Crusaders)
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 0x5539c1ca9a57a5235244cd7b573c3c98cfecc570f3762de88daa32cd398e4ec7. 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/DEB909600901.
Seignor, sachies, qui or ne s'en ira (chanson de croisade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3a725d4c5ea330e88a76eb770be98db96a8c8548765a8e600479416ff6753. 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/DEB909600902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be10fd585072e13d73528721397c0c407ad8871800189d0fc212ec8699a225. 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/DEB909600903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc8fd755d14da1be30cfeac9d0334809827b6af323931e537574bd8e66ff9d. 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/DEB909600906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0f713a4f8d1560ab97592c9d261696c117e2f49c6ea96859fe480c9cd410f. 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/DEB909600907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b66f6d56d3caa7d454d7e9dc70d3696d793413a5c21e315605fdd64f8e0f3. 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/DEB909600908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b1dcdf3410783c0996add5a55f5903b99a98ac4e7aa97f2f19c206c2d99ead. 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/DEB909600909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7041c8b1902eb5cb4611d1f1ebca85fd31987a9b9d208a157fa1dff919631a9a. 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/DEB909600910.
Nu alrest leb ich mir werde, "Palastinalied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2455e41ba637fefb33ee78587ff1c69ca6ab3b30c7f3392420a075a3e1221a12. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB909600911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a276f248f49bae245c915ef770daa0ca5ad113b6a78c24b9a2180524f6be7b2. 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/DEB909600912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f5bbca5214d3ae2993085c5afb010195d4c293947b0f610e7473ad167fb6b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEB909600904.
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 0xc84918f95fba97b3fc81a60866b3a6e8b17d9c571d922bc3d37d58dd1ba75bfc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB909600905.
Inspiration (Hildegard von Bingen: Lieder und Visionen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8656e0fa63cacbfda4faab4456a67bfa5061668a1b9b7f1e853fbad010c90001. 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/DES380020828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff56cfeda03b4a6a2d1fb4a13c6f82e717c0366ebdee798de533007f520f9a6e. 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/DES380020829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98956324f3b1f00bc805f116d4fc56cecf93ab18c3609ae07fe8e02cf94db74. 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/DES380020830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa253cce656a161b197cda98395f8ae7cb63f19db28d6ae386342e31edb01703c. 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/DES380020831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382078d8911fc20d3badcf9d501e00db7b0b2919eb396a71317034c856fb9136. 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/DES380020832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f501c0725ff4fbbe551f72fbc185ec02d21dc217b39d616675e601669f4da37. 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/DES380020833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b36d33898fc0a773424d2c6a8b7197c5873440fc05aa53b25bbb760435c4d2b. 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/DES380020834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63df8d00cd7f1b39ea29caf23bd5184942e29d88dbb7b878784a2de2483d2d7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DES380020835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcb0e323c19aa5bb5a2b8f1b03fa699a275274f834edb857e7e22c409986fc4. 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/DES380020838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84481043d16fe976183a328b6a65d91d011a5910a7b1cb54c62367082117d8ba. 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/DES380020839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1dd9b4eb6903125b099c7178bdd557721f527af51b36c24cb7c22184421338. 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/DES380020840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f87e549545d41fd279bf5b734c15ecf2fefb02fe330a5a4402994a9bb7b8c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DES380020827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ce0bb2b65e4df104bec448c1229579836b9783bcd870d4617660bacb1832f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DES380020836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d010e3b6a6ae98fe84f99240d91a016bbe03e2153204ae6a4666f570829084. 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/DES380020837.
XV. Studium Divinitatis II - binaural dummy head recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aa1268e4abccb7afa087e35f6527c032849653cd93897ee2aaface8f1f75e6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DES380020841.
Nicht ganz koscher - Eine göttliche Komödie (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429b4929240a809ade62612823fb928481d17c410e5f22085885db77f05b810. 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/DEYX82130383.