Kermesse (or Kermess) may refer to one of the following: Kermesse (cycling), a variety of cycling road race Kermesse (festival), a local festival, originally relating to a church La Kermesse Franco-A
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 0xf362d05271e7ef09f9b1fdac757ca23a7abe0d73c57ed6bfcef4329f9bba5a5b. 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/0612d015-a15c-4ff3-b553-4bff64e62168.json and https://artists.proofprofile.net/proofs/artist/0612d015-a15c-4ff3-b553-4bff64e62168.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 0xd1054c493fc21dec1239a1e7ae31263542139953bbcd1bb9326fe223f94ecd8f. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBKQU1790956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b72986528690cb90af297e1e76193c3bfc3a90dc32e3548933456cf8b826c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEY471813249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d52b34fbcf7527b47485dac16974609e2cdfc0d17f63ee889a215538afb5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEY471813251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04c779652348ce5979e286cf66908501eafe8bc36da7576c553fc94698c1d90. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEY471813250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b72986528690cb90af297e1e76193c3bfc3a90dc32e3548933456cf8b826c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEY471813249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97531dcdac64e3da67a2029c05efaff9accbdd7ed04bf4e624edbad8d88a6ed. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:09Z), 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/GBKQU1871259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36017b0e0e31df2c9e1ac71526f42b57d428a629d262f00943d1d173efa626f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU1871260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8618ddb814e1cd8a65add2be05383a750c8d9538d53645edc56145a8e609c558. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM6P41815593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2102899a0d5546499893ce5ae9247cc6c253e798f7b01b976e0297c23c3ee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6P41815599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41fad4b54b4c6975cadd113d30fe1789bbf38da86db724e91453286051c1f6. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QM6P41815600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66ba18a183124c4d9e2b329296bb351b5383685f8db5ef6ac33d1a2f8781a5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:45Z), 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/QM6P41815601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55211ee143facac0cbd6f348b2333b4025593767df2aced525d948c40b99033. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBKQU1961391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97920b6bdcdec3cda876533fcc6a69d53e52071f06ef81d1e91d1ebe1fcaca9f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEPQ61900837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628ddcc11c273d97a0a594fa144be2ac7dd30dc14e6128f3749eb808ff67d32. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPQ61900839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c07a6e59f1658abd20ed5731166e3351d09c7fac094a6320dec20bb3c0bdb2c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:39:20Z), 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/DEPQ61900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2279b07dc1abbc60c3b8b6e2f62b78005042acc6d26f5469b988a6d02c488e4. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBKQU2033116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1c67731c57894cdbb9ae4db0cb7c427216c6ba71e87dc9ef2b04210fa7a41f. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBKQU2033114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b350f29e3e20604307222d3d62a8fed4d54a6566104b7a92672fbd439c2a52e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMBZ92082988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b57b61bd8400417fa7bf47dc890a1d8659cd89831b7a3a213ced240a8a43c3. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMBZ92082987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f67123de1830703df99e494958f37851a0f2a647f6ef54f244f87aadc4ded3d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBKQU2136683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd3058f66816cbe70013db4ac24181922b0b39647877fdc3bd1e8cf123737bf. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:10:41Z), 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/GBKQU2136685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ad77c6b3ec9fe930537ba292bf303b0ea20add1763e896d2fc899f1a2fddf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:49:20Z), 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/QMFME2255764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab0fc9721b575e137387cfde8092b5e52fdd843f758a86c80eb7fb90f4438a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMFME2255763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f947cad348ee34aa6ca51c0adfa81e8e0ec141f63f91264c850e0354543d071. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMFME2255765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80e908658a9b468344c34782b328e8390c29d27f912874fdb353f5f9e33cbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMBZ92456680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7895791824b9eb2d29d718d4bb442a519bf320481464284b4c8a45ffbea6d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMDA62414777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94a55143c71da22913ead0af923899b196e1e4cdbb2cd41442bb6d8048e1091. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:51Z), 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/QMDA62414997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80e908658a9b468344c34782b328e8390c29d27f912874fdb353f5f9e33cbe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMBZ92456680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d9799927942b61c7621218fc2945b84c57bcf6823ab818ff7fb10b5e059758. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62415099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db54232d1bd3ef5cc912863013960bfce5022d21ec6162486c22f50cf85928. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMBZ92512761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914de5be6a1651f4b1ce7c4baee91d5bfccc2e592e0589b0fd3ecc015c008a3a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US83Z2539123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50de3124ff801edbeb46fbe682122de62926829aa6ee536d5c8789c206a57157. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2539124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fb06907d76b584fd614ea3b832799068582da7a385e81372be2e9e09ca1d4b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US83Z2539125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2293533e4212e6d52c793ba6c9801d6bb65c5c5bade1d14e6bc2bfaae7079316. 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/US3DF2496039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1640655a345997fc075396bc2e2d13318988296142d69e75e4ea68d02bcd8df. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2099805.