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 0x830563ba19ff9f225e785278fe948a262784e94560d3dc98659fa8f5a9633651. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a75b5f7d-83b7-4183-a4e4-440991247101.json and https://artists.proofprofile.net/proofs/artist/a75b5f7d-83b7-4183-a4e4-440991247101.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La tribu de Pierre Perret au café du canal
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 0x226e08be8b623608db09d76bc7e0cc3199ce5b4277e464acb1c0d58a2bee9815. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRP401700440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8a76cbf393aad1840d60ef1927b39934f957e2bfe5d6b0272226ee8df41bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRP401700490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f0b79ae93648a7d52e3182f5e9346abe149eb10007e3aa4678eefcb8c0de2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRP401500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c60205edd28fb2d09664b9ec632445aaee510d73637ddcdaf3d78975c3487. 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/FRP401500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f73ab5767057c798cf487ae219ea3769bddd1f2136ae7b0c6e07d83797c83f. 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/FRP401500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559d48f032904aa73fe57d79066759a5598787966a6cd974248393c6aad483b. 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/FRP401500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59de0a7bffe73093621a77995c45f64cb2a0ecdbfb2c5e97dc97202945f91a. 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/FRP401500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126115164734e8818bdf52cbbead3d726c690a85ba4ae0f345688eb9267a6ff5. 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/FRP401500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3e41f25e388cd2cd52e53df2e83b415b232cc9e5d9a689d653aae267aa9b3. 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/FRP401500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03dad7c9d91ac24fc9a4a5d4601ccc44e1d7ae2441dddec86f726a10f78c22. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:33Z), 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/FRP401500250.
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 0x5805b61324d708c08b1d530e8419c04f845c93968d642b494ea946e735af272b. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/FRP402100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6027b7e5b1c9e9c5d1b6d1375df7800c621e985fde928130268debb7e209baf4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRP401500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247e64afb55ffd3d2112d09158171c7809bc4cc556d7df64d4d6720c7dde831. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRP401500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a33caf40c160e80ed83962416ccdf9aa6da678cb1309de575fe9eabd5d3a4. 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/FRP401500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03d1181e5ab363a15f1ad5c2098fb461143d55d72dc33299c4e4bc343f27fb. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRP401500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7abb326ee7f02f6c4620eee3dfe1b7b291b252c6577e18bcf3b694c3a18b3. 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/FRP401500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b507770fec935c52df2d1f7e834f222b5c1bd842b54f0c4b39b5aae2c9e31. 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/FRP401500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b631b9c27bf3aa54abd12b3a760d3ba4a1e82a4c554c264b423e4fadf8658d0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRP401500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d74d997811f8d4f6d01fa3aab4ebfc3684c831ae37fb71bfe20086d672d0eb1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRP401500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97153136a3b377bce6ec4d6805144386c7a6c9ba37800019178a89e00acd9e9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRP401500340.