Antti Ilmari Hakala (born 1978), professionally known as Nopsajalka, is a Finnish musician and producer. Aside from his solo career, he has been a member of the bands Elokuu, and Kapteeni Ä-ni. To da
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 0x300a681d9b7e68663846f5cb210abdcfd8a12c189317680b5444c09f2e9036e9. 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/1b415645-fcd0-4615-8cda-6b7a9140bb85.json and https://artists.proofprofile.net/proofs/artist/1b415645-fcd0-4615-8cda-6b7a9140bb85.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 0x13e0e31cf78ef537f314a252a3b46c58c2150b034545f1953345c04f811ca599. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIMRR0600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5aa5989ba6279f423dc75659dc1adfe5bc439f77a2d58451e511785d4611d0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FIMRR1000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53269c87935be0b154a94def7183f1cb3acc7c4e6c34cfebba93bdc00fa1026. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FIMRR1000158.
Matkamies (feat. Leijonamieli, Stepa & Are)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3825e3d9275479455526e4e9f987dd30f0392f2628cf216ffbec027cecd7c87c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FIMRR1000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15588e8f542e3aa45443460935341011777335d9969204c5aa0cb7de9948b28. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/FIBAR1400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960f6bec43723bd16e39ed4c49ed78ea83b6a32e66cf1df4eb5d83cd6ff13dc. 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/FIBAR1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3458457a537a021630db14e98eda02cffaee17d470ab21a2554de7d5ff2b9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FIBAR2000158.
Pojat ei itke (feat. Keko Salata & Raappana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5de6fb843ecb1c28d7a28cbd3081c751602f4d68051ef45cb626dd58252585. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FIBAR2000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126775cff96cf456d0b6e7d8282ff3dfd75b18484952800407038cc957c8547. 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/FIBAR2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8154519e0a79be0f02f262a60d5c06600d93df60286392e590928d2bce4f1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FIBAR2200081.