Après La Classe is a ska band from the Province of Lecce, Italy. The band is composed by six members: a singer, a guitarist, a bassist, a drummer, an organist and a disk-jockey. Band history Formed i
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 0x5323b6c36372d47be13e1aa1fdef04a7d56970d9243c48bb01afacde613fd6ce. 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/8325be48-0af1-46f1-a526-bd3b5426951f.json and https://artists.proofprofile.net/proofs/artist/8325be48-0af1-46f1-a526-bd3b5426951f.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 0x6712c28240f09b3da2e4b63bdc09ddcb5712e2888bc4bfe9000c1ea6a2520dc2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR6V80608812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a96fdb4e174742002269a42cdd926efbcc5449bbaf1af2e2f8ea9da58395ad. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FR6V80700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e83659cc860ef0bf4931565e89fa8cd95d3b241251726a60406c6b1102bcbd. 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/FR6V81300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20103812d5909fe4ea9b4c49ca30af1f81b363d8631da0c723e426d4b58b42. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR6V81500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e83659cc860ef0bf4931565e89fa8cd95d3b241251726a60406c6b1102bcbd. 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/FR6V81300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20103812d5909fe4ea9b4c49ca30af1f81b363d8631da0c723e426d4b58b42. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR6V81500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2090951a15252c4aba0dc3a221d23dc2b01d0e09520921b9d3ede116898fb3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR6V80960266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ee2b8ea6a1f517546ba49aad2fb515ad261af20dbf8cf007cb1df019a62ec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:39Z), 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/FR6V80960272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5e9c59dbf3e4297f43c8ef8d532a22d70574bc584c9f99153636e04c3f64f5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR6V80960273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee10bac998487376e3d46c80439d1f15459864b5b3f11b9dd186a98015a25ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR6V80960276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf0ec9c57151055497376ad2b46ff67f524a2a0e64c7cc7177ca26ee62e02a. 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/ITE010208183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68f215bd0a0c95adcca5e5df28570afaa62b42431eb96ff10bbc4c00094b07d. 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/ITE010208184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de30c7c52863259e5d6fb8df51d0cdab1d61d2481c9d6c48f62e0fccad1e93d. 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/ITE010208185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00fea1500ef90de3d0914f2c6a83c5edf519bb73a5469913ca64ebfa701a518. 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/ITE010208187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c52fa87161dcaaa0b11a3b976fc89835f7296622901adfca3de68cd208f90. 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/ITE010208188.
Lu Sule, Lu Mare, Lu Jentu (feat. Caparezza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d62bc2740fc1d6c33c2fd748be5d8c34631d732d3328dc5b1e5d41b14fb633. 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/ITE010208190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208249cb4b5b2fcd0a88342713a9d2a4cf13646ac267ccc3ed01df76efa374c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ITE010208191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc2d118d91e837527ba5ebbe6eadc7b5a4a3441c676a5ed51216654771af1d. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/ITK851400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8059e979436af99319a88ab09dad5d770f1c614ed31d46d880daad9222f0e6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ITK851400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3d49d5d5ac53a110c1534421caefd2e8ac87f7aa7ee0f435d79ec3bdefc0a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ITK851400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded35b33c50dda153d52b53fa8b196244c31706e7e9f25a4a8ee7d3da269749. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITK851400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95424d1cd6eb1c375bb82acc29c13be83f7034fe9bf8d1a54d95ec7c81df236. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITKZ91700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814a82ab79c6d6d2f4c92008481562fa1dc3a10267280d3d07dbbc0e1c918108. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:29:59Z), 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/ITKZ91700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa497871c5786b90b78c1cf64097c72cd5a24dc3efa0fc23a04287c1b4d21e75. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:41Z), 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/ITKZ91700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04419aa19faf97a5ddbf9af2911ade6f0e0699ca5807ce206afae4365c7bedde. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITKZ91600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82228a6c62ce186dedc2e3fd510f16a88764240dd57deba81b18f6c78be04358. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:22:27Z), 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/ITKZ91700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b9df6c223fd2192ee0a9219e25620a5ada5b4f245ed60acfa776faea6eee78. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ITM381900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0394f18997c56d75d0af671005db32c995a04e35e42f05236f478b88797835. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FRX202075719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c4695223e43a01f7985b725aab0d7725d0c6db7664ccf4d019a7b57cbe6dc7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMEU32211109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e221e45a63d3a7ac2fdca2b0d6f8a33745b836603a90dbc9e9f6a3891fb27. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:25Z), 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/QMEU32211113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48d7f04a7597a628038c39f738dd5969f9c2059f0344580c1d1d41fe2f65df0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIF2455857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0080c78cb71d6914d280cef376845f6a0ac30f5d9aae239e4ef36574f8ff100f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US38Y2533777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748cece4b09bb1ca3ac23e82d2bd45840c9f122d6ff2d67a3dbd12f8404cbbe. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:45Z), 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/ITAA52500005.
Pizzica la taranta (Il folklore del salento)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce192642b7d27422e92118be997c6fdf51f1c1218c0ce38618581efafa90c32. 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/FR6V81363428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308c96e5bee66863563181a495610782980229cd256d6b1b2bfce52b20c329e. 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/ITKZ91700008.
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 0x24a8f85216f9c9c725e7760cd1799c91de23dd2a4c5a000c87337c04dadbab01. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITL111400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d34b718fd00675c980a712fa48e4f1a85091a1ee173d8987193f31d02efd4a. 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/ITC941602863.