MINUIT, now MINUIT2, is a numerical minimization software library developed at the European Organization for Nuclear Research (CERN). It provides several algorithms that search for parameter values th
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 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 0x369f89059ca753b0cb4d9b8e19a4e0c4c312d54ebe401175de60be7d3e883c91. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a28d46-2f6c-4267-822a-0f73a5867867.json and https://artists.proofprofile.net/proofs/artist/e9a28d46-2f6c-4267-822a-0f73a5867867.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 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 0xd814430a894648a0aa9421b8557f571025846be85e697cbe39362ea4dc2b8990. 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/FR6P11801080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1ab495aedd9ec04702fb6dbc9decce51c472f6160ed1dec30d19def9ccd161. 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/FR6P11801100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8a4a685efa9d8059bfbf9e21d665efc7695f197e687f1b5218fe3d7dd0b973. 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/FR6P11801120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc0e780ffc977c984c9ee1ce005a230b77d3550123ed7e930fbba30a991c648. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FR6P11801140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1dd104f7d05ac1957a692f58b2785f5d514ed573b8d1f46ba9403a3a12bb6. 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/FR6P11801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9db17e0e65aff7e99b75f64cc875ae8266e6f7c8795269afc11c9766373103. 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/FR6P11801180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab44fdbca7ba56ef994258ce5af78fe172b1743ae4ef0e4d874dbe975431cc2. 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/FR6P11801200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab18a5cb1ca2b37860a2731fe2200aa69e53eda986d673e166ac7f903b6baa94. 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/FR6P11801220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf913809e0ee13fe9adb689afad145f425665c332bc42d3955448a05b69d13c4e. 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/FR6P11801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bbe2fd93d932eab04d89b30987acbcdbe26e6056d9e2eb0b72dc2b1a0fd92. 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/FR6P11801280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867514b805a00d0e9dd314acbfe726344013721051d67dc7e8453972ee2093a8. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR6P11801260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eef7eca43893a88cef6e16dee8691ed75fa259671f82f9a18b6780ee78dce7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR6P11801300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f574d0c4ebc1e430fa2e0452c975e6e742d4b98cd75261fa2e193a116f9d0. 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/FR6P11803530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8a4a685efa9d8059bfbf9e21d665efc7695f197e687f1b5218fe3d7dd0b973. 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/FR6P11801120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec71cb10f4a961099457fb9529101f2113111aec09873d5473079de18f8806c. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/FR6P11802700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0d9ad3d63fadd7aa2913c4d50fd9a1cca4c1aa77a28ff5682d55f71bb5a538. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR6P11802550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0698073d16efff47be086a781b2cd2e2468f6b1f12221a82afaddee369ec08. 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/FR6P11802520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408347ae9f705882476ff5ccb329b410af496beb4bf5bf08134979dac768732e. 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/FR6P11500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ef9ab3d45ecc74ffb8efaae89fe483d5d89d43364415b91c19042356acece. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR6P11500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a3ca6b49a9148a7a9c7a41b57650b27a60af505f7c43e43535edba1c417d1. 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/FR6P11500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2753eeedc2a7e09e547314a42d4ef5934d57bcadc31e5d36d8e32b9eb9409c0. 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/FR6P11500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959dea5dff34a3dfdbba39f178a95b0374e3da6ec3101f6101df9debcb62e157. 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/FR6P11500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408347ae9f705882476ff5ccb329b410af496beb4bf5bf08134979dac768732e. 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/FR6P11500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e55c8d7dd40426aef222bb1d57a2a0ba5e268197f839a23dbe2a63a89cef82. 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/FR6P11500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67eda1473a46783676b02b7f6d418157885b1260dfe52f87e93b9588717896. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR6P11500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf7f1f1c515b6e0a8e617b37377b015b5adf3804661104a0f187197095defef. 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/FR26V1415572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd79af7ffd488ee63fbb00c289d91a75c9366fe12e24694274fa61ebaeaeb246. 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/FR26V1415573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6312d8171ba58cc7a7933032862e76c9f64669f32358f5e60b2f8e56427acd2b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR26V1415574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627416e45cd6218be42c358705842c4a3c12f063214ec96a1d2880d4404f9907. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR26V1415575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac871638e7b8dd76a0faf5b195322a38535deede5702bd3b83d5ac68fa0a28b6. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FR26V1415576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c270675e06ad3282780f261376934ad6cbcc58648e602083662a1950015ed2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR26V1415577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c442f85a8c194bab632b3bbd01c9b8a233898c1bb8be23386bbfb8bdaa5a292. 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/FR26V1415578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff34013e46ba5381ff41e120b871742ccae52be7ce1e1342f8b84a86eff1688b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR26V1415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397c5700e7acc9b1ecaa3b8a7557007258fc974700eb20c5f8d0e25295d6de8c. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FR26V1415580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c226602dd8579b3b7ef58aad47d74e271a39e4debf6980b8fd233bd7578c14. 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/FR26V1415581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca084c9e761b8063014c69ca6c2b0997e0efbee75ee4c44cbaaf5c3bdf86345. 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/QZK6F2310462.