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 0x5e404f3f69e3558ed02e39e3b83f9f6f45f1c0f33b03e8a985629f1f9dc32ff5. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b6ed2c7-d61f-4fa4-b733-f541b1d41662.json and https://artists.proofprofile.net/proofs/artist/9b6ed2c7-d61f-4fa4-b733-f541b1d41662.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5f5c1cf88b20a91f5da5c36a842e01070e80c85d54f4e7e1665630f3a4b0a859. 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/DEU672301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3778acf60d51478a70606f84179990446a6b3307b8eab2b481c0becec557dc7. 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/FRT092300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65dd476d2c909a6780b36f1d35dfbf30a971fe6ae76e2dfcdbcbe88f0779681. 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/FRT092300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e571f048cbe3006419328839311262a20627276da5748d1574a5872da9e6e99. 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/FRT092300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab0fe978253b5754c54999192c2bfd56a6a2133ba8ef21a7df6205cd8913dc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRT092300092.
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 0x6ce709ab8583900234c87b75afd8e46ef80d00879c9e5f000326711d3a280990. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRT092300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2ba52cc047e07b795529f0ae11ba3d916a7b785b3c462c308203f7677664ce. 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/FRT092300094.
Ils cueillent des jonquilles (Micro Siestes Acoustiques)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8137c1eb3262356ed90f8e20e00ccda7dab74517f387077c762826c4e38353. 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/FR1T32108030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8137c1eb3262356ed90f8e20e00ccda7dab74517f387077c762826c4e38353. 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/FR1T32108030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbacceb662c9c4e9cff60bbffaa671e8b0ef8088c3895e4003ba2f5a49ece19. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR1T32108040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c3be6b917b77e5f25234073a8ac30b8ac19834f8ca53dd99e1f8773c7f3a35. 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/FR1T32108060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a3e0931aff34dde832ae772f871fb788dcb2bad087c97a71c10ec0377b42d. 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/FR1T32108070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242136178c06bcbd2aa88f2a155267a105bd672f96882a4fc8ee3a09418609b9. 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/FR1T32108090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609df96d8015b2a49894df73ee7c905945a7af32e01bdca52ca3f4aca68c1ea. 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/FR1T32108010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4025e7e7ef2770e47696d9475e6ef87fe7e5d2212ab41af7f3fd833f5f0353. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR1T32108020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd34e06998abe02d5024d6a218d742feac9ecf3cc77d8bd495044190d84e2bc9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR1T32108050.