Kapasiteettiyksikkö (Finnish for "capacity unit") was a Finnish hip hop group from Helsinki. The group was formed in 1997 by Anders "Andu" Westerholm, Markku "Tasis" Wettenranta and Dan "Uniikki" Tolp
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 0x11516c693d893dc2e47e4273782723ad61238a5c8db723274a522cd56812dbd5. 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/796fb117-15fc-4937-8858-360c3eab86dd.json and https://artists.proofprofile.net/proofs/artist/796fb117-15fc-4937-8858-360c3eab86dd.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 0x138fad8814509fca4b662601b382875dd0d2446758cca27d4a1646ca953f3286. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FIWMA0000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91487f683ae4a858b5b9cd7588814eabd56ee7699dd1dd9282203d09c35f69. 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/FIWMA0100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cd39ccf8e72c2f02f81feccd6e931fc6a5cff3ff4f0df1037dd42b6956366. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIWMA0100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25d5e2bdb9f15ae04454f2a6a8f65fd7c04482753e808ceac88e00dc2bdd4a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FIWMA0200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef6cc8019fece7ccffed328ea86dbfe23416e1e7ad02d151232e552906f71c4. 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/FIWMA0200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c95dcfb826b5c1b1e4a46e77a0aee970ee9a95bd40b4d8710ff15d5b89e42. 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/FIWMA0200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc555e47493532e14b8d5cdd8684e186c710d7ff03369abe8ccd8ffe907614. 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/FIWMA0200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20f899e594f4ca5a20d658910ae559aa230f2dd2343df21b7cc5be3dafcf6d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIWMA0200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecfdce3664b65ce8251f811e02796f2fb019126df9898b6ab6f392baf712dc6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIWMA0200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48331e4ab217f72e1391f3d94e7d4301913195dcc187c81abab114059d9b0abd. 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/FIWMA0200203.
Kenest sä puhut (feat. Trilogia & Eeva Vilkkumaa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa2f62c8cc96562470d62d98d9523f2db384d8343de0df0dd86b75058a69fe1. 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/FIWMA0200204.
Musiikki (feat. Jussi Valuutta & Jurassikki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97707c997900d7f1feed47dea33efe50170ab18dcd97dd45ec5df8e0763c5f05. 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/FIWMA0200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad1961510f31b1d8ebf303f2b984b4e0857c7cd5ce1a5155b0238e3821db78. 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/FI5RR0300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1761bb687bb83272c6b49e38f31f809bb0e87f25bad2bbb29b704129dcbbc6. 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/FI5RR0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71910d474bc35ebfa4df833877291d72df92b3172640bb3984a33cc0ec239945. 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/FI5RR0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae15a4374ed9860f1ac8528080f477296f7df4032ec05bacfd6a5bac0df6ff. 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/FI5RR0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7519a2c9e95b2646c127070bf5e39df7ebf0eb4162bf268cd85c213bef5dacf6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:09Z), 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/FI5RR0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9b483b7744169bb5ff427bc7d11e52f3b2c903967f358b26582ec0619d0732. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FI5RR0500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36651be9152e0ce94be9a9cb366f3e3256d0c826c80ece9972f52d0903f04169. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:40:47Z), 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/FI5RR0800001.
Leveellä (feat. Herrasmiesliiga & Kapasiteettiyksikkö)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d96c54772e3f65487f3eb687aa5b3adf7c6a5c1bfd882cc256d8b3bee63304. 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/FIWMA1500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9b483b7744169bb5ff427bc7d11e52f3b2c903967f358b26582ec0619d0732. 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/FI5RR0500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eb9ee1f9b24aa76c7e5469834657aa9e0735176541df17975185b8c9f3a12a. 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/FI5RR1000070.