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 0xb9316e48e3707bc8eb4447da5618b73464dd2b6b28d58e501045b10e93352440. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b998923-e6ea-4ceb-a5fb-a9d8a4713401.json and https://artists.proofprofile.net/proofs/artist/0b998923-e6ea-4ceb-a5fb-a9d8a4713401.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Une flûte invisible...: Musique française à l'aube du XXe siècle
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 0x0a5c45ae6c8551db4502be7d2c594803252e2b06cc66483b304a3439d6f7edc8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80792416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40cfa5e78c73bf02bc43942555bcc6c9e6559f04ff08f6d6c07af73e036ccda. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80792424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c76f15da7f5a2f6068ff50ad9238bf470de5344d195fa131d223a56a3e4f5e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80792430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382da6c2efe2e35e633a39b64b931e87458b1fc39d2f455ca2acc33af8a04a4. 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/FRZ810612826.
Jubilate Deo: Reges terrae et omnes populi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1b9185e3390fcf296b4bef1fef1d80d8e5882fa6823d82cb0c82a374baec35. 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/USB8U1611527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b021a96a9ba741ab56b02d665c3ac4e73767748b90dfedce4acfef35e611c. 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/USB8U1611533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ec6d72ce39a77554317632067522d8dd615bbed0d37035fa885aa291c0e97a. 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/USB8U1611535.
Psalm 115, Op. 31, MWV A9: Duett mit Chor "Israel hofft auf dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dbda317e776a387bc70232fa5cb4d8c8d6115d8d8db6ca321b40f4e9b0aea0. 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/FRZ148711080.
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 0xfdfc6bd5e27d898b0312ef77a4efd406e10f38b0901891798cb06ff84a5303e9. 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/USB8U1611526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ff49a4d1f4bd70595fcfd9b907c21c2919a8e7871e481ebd5953ea147242b. 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/USB8U1611532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56caf7dbd94b0ff2050758748869a4584bd748f65de226542ee229fcdacbc4cf. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USB8U1611552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4686abef7db41b24f646773ac52e0b0446b2beaef4d67bd602eb00c8ff305e. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USB8U1611529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5087cb2d621cdfb5dcedb14c1947b8a04bce9ba9d35c6433b7fcafaac787d58. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USB8U1611531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c7b8b176f5eef0ca15977bc85cc895279f0454bc9b321f471ab6080f96675. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USB8U1611536.