Clou was a Czech rock band from Prague formed in 2001, who sang in English. They released their debut EP, First, in 2004, and a studio album titled Postcards in 2005. They went on to release three mor
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 0x27510d616afcd8bc77df805c79c3ecebf20bd89d9cea631605bbbaed21b890cc. 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/7fa8d3b2-e535-4939-aa70-c9faf6037d18.json and https://artists.proofprofile.net/proofs/artist/7fa8d3b2-e535-4939-aa70-c9faf6037d18.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 0x0dad807a1674064900f9004397765a09ab82bc641f6da7650af6685148ca082e. 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/FRP9Y2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb18a973c76c1f90268d98f3458c1811f8a649a5cecaece8558ba5358c2f9c6. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/DGA052368996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf27cab119153eb3d018b740e182d8f2ab877e8f4e83bd87910093a367770e. 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/FR79W2000610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599bad8a6232e0501dbbd5f67452c565056002ace297b190d1f9c31a2c28d4d. 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/FR6P11602740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad807a1674064900f9004397765a09ab82bc641f6da7650af6685148ca082e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FRP9Y2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd8a80985f2a2ba4ba5bc4408bc36d671974b9e212051504b2c3a1d133ca8f2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR79W2100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2319cd0c940d912df10ae7470ae7dc1f815ed272abe4149cdefdc46063045ef. 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/FR79W2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebf27cab119153eb3d018b740e182d8f2ab877e8f4e83bd87910093a367770e. 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/FR79W2000610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d7e504bd2cef38d09a71dec952786c092ed29c3747c6bc1c5ef745d33d6c2. 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/FR79W2100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ee4dc701afbc437217c7e254d7d2d294b619e02b1f228e2da8e697f8dec1c. 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/FR79W2100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c26b248de963354b3266c46cfb1a8763cd2a287b1bf9a0916a81326ba82eb. 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/FR79W2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c26b248de963354b3266c46cfb1a8763cd2a287b1bf9a0916a81326ba82eb. 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/FR79W2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb18a973c76c1f90268d98f3458c1811f8a649a5cecaece8558ba5358c2f9c6. 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/DGA052368996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4813c3f2e41fb4d379c79302631fd3cda265c676810ede41218497954c24dc. 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/FR79W2300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f59703743701dab2121443f24b2149dee94b4c1005633f055c9170680dd5c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR79W2300730.