Kemopetrol is a Finnish band from Helsinki. The members of Kemopetrol are the vocalist Laura Närhi, the drummer Teemu Nordman, the guitarist Marko Soukka and the keyboardist Kalle Koivisto, who also w
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 0xa86f67803e0657d77062a0a96bf4c1a4d1cb577e349a2c4d20a7796cd7a8463d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/564e7048-50a1-4198-9fcd-1230b7e2782e.json and https://artists.proofprofile.net/proofs/artist/564e7048-50a1-4198-9fcd-1230b7e2782e.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 0xef295133d2e38c83605755e5e2ad32cd2c74155a3f2df6e9c01e09cc652a4d30. 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/FIMMS0000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4cf4eff9eefd0ca90c9f5f2744dc171f895ccb141398fbe18aecc1caef65d. 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/FIMMS0000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc695474db2972a5e54d8c227f222577c953acf7ccfd4eb56febbd5862d2b2c89. 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/FIMMS0000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d9300964ef229e45602a320136dfdee1c60559c9d1d040ac2e135dd288926. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FIBAR0200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadfb70acd7514ea2a8194173612ebbd17016ae3981d3846360b33b7880b8b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIBAR0200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce958b394e121a008e9fc40f945f6309d25c49f21e8a5b6891ce1fbef7922977. 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/FIBAR0400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6864e4be1ae077917d1d5bda530c253dfda4322aab9d18d9d441b5eba07ee494. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FIWMA1100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce87ccb6c23c6f6cfce440b7894b4f6c2534f47f2fbb8bf62e29bf63217ffabe. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/FI9PF2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0430239a4c966dec52bb2734f41c9c3957919517ebc72c65b47b7dbc19e49a2d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FI9PF2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ac31e9656304966a65560567b1f3ceb574adfaff726b40ae08ef11e9ffcde. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FI9PF2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b29e8c5fa0bde8178fb2aa8e349b55bf7d4dee25642b2e5b3fc9ca608e62971. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FI9PF2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5dfdb43ad8f14aaaf625e2fa3c82f62af61cbba17d7633d03563dbd38e3b4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FI9PF2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d95550234b7623fc763965456719efdf6bd02b8ca579bb2b27b84ed9c28802. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:26Z), 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/FI9PF2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a56824dd140406db6962339a4e99142a5d057b1062a403ea01375806403c93. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:34:21Z), 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/FI9PF2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40183f3709ebb5a5ab32ac42987ca82418ca95b08e1ed5f7943998e619e83cdb. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:58Z), 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/FI9PF2500029.