Radioaktiva räker () was a Swedish trallpunk band, formed in Hofors in 1991. The first line up was Johan Anttila, Daniel Torro, Jonas Lund and Mattias Johansson. In the summer of 1992 they were signed
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 0x320cd2669328ef075ba9e2665bb544826448394abb1670dc7e2a1d9f65dba416. 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/b846d26d-62e2-4cdc-b84e-3ad6df22b2bf.json and https://artists.proofprofile.net/proofs/artist/b846d26d-62e2-4cdc-b84e-3ad6df22b2bf.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 0x5acb10032dae586c48e4e08aa9a92c3466a2f2b68208b00af57f44b97d28ba38. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SEYWF9400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db3fb3df68d313f556739e5c8a7fdea88dacab5f16d789f66313a8bcb6b6b3. 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/SEYWF9400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185689059c88ec7293120c7d27130db3b8d9f73684c78f0962cbd2548102c328. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SEYWF9600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688247a8333139c961d91b8d5464f494d54222faad3176c326b06e72a8062e4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SEYWF9600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a3a250c7ba989401e3044dffa5e03894273f4ee562e11f844a5d376d8caba3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SEYWF9800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018c63917193f4d108a6014ac57c1fb6e8158a130cebea1b06c746bc0a562e7e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEYWF9800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b81d34df2e5acb4d3266d6ddf6e53b84716f8cc0a7fcf5fd515f8c124dc788. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SEYWF0300103.