Rytmihäiriö (Finnish for 'arrhythmia') is a Finnish hardcore punk, thrash metal/crossover thrash, grindcore and surmacore Helsinki-based band established in 1988 until 1992, when the band was put on 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 0x9bc24dc28ac6fb37c0a5ca6ba4068b95f0e6849d32a3c5d32d428b6960546339. 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/c0efcbec-9a61-4f25-afdc-e90c93a49e67.json and https://artists.proofprofile.net/proofs/artist/c0efcbec-9a61-4f25-afdc-e90c93a49e67.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 0xbf5c3220f0eb7cb18b4a9448e9e958b1999c02c2f2d377bee056654038d3eeae. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FI5ST0600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1276c7b3e46241983de0b8d756d5ee8dbe44bd7fce3ce9c1be8a865e4c583bb1. 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/FI5ST0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0e634fb1d4a2fea68ec3b613683471c7e8395a59f8c906f603dff1e31db76e. 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/FI5ST1000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ee1aebad3a22727edd69a203a32346a7f22952cf2d909235aa31cc00675612. 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/FI5ST1000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd00777788eef51ccc8f22ec2a8509a751fd209baba881f4b51882e1a579ea1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/FI5ST1000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555d6aab1490f87a50ba2da7e90c49e28d5ce2c5c0f91c935dba7b5650438965. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FI5ST1000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb952bc1acdc0e4922271881eb1911e0fdc5da1236779eb0cea44fd7089f848f8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FI5ST1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c2c6854a9bd2b0f595fcf1cd8af19d0cc302d432bdd80f5b79f76402c3a76f. 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/FI5ST1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107774037f4f64f3e2f3b97542eab18c24cb5fdba499bc9c6025fe892df4241c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FI5ST1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a1566143637e7039663a11dbfc245526def1f821575b96a220d5a81d89d930. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FI5ST1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251161b8b8160957393d3087d0dd60c6ea87634cac4d7b690366d5fed5be820f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FI5ST2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c1ee42a3a7caf4a66e063d439c338e8425f425efc0f9e03ad31e2d90f928b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FI5ST2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6c9794f0d62ac084c2de5e3e81b175c457b03114a18ae49dc27f5fe8a1d8e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FI5ST2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747ba8c2434ebf8d6ccf679ae28f7cec4117a426912c1e44fe61968f5390b40f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FI5ST2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ba06e48b5ee0b91e962b9de5f6c58ee80316f5e94436260096c521ab356198. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FI5ST2300009.