Tjuvjakt is a Swedish rap group from Lidingö, Stockholm. The group consists of members Fredrik "Woodz" Eriksson, Olle Grafström, Jesper Swärd, Arvid Lundquist and Kid Eriksson. As of March 2021, the g
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 0x334ab0c97061b5f2b026270b8e8077e11b1ddd0ed274c6df30c6efba8874342a. 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/62548997-2078-4aed-aa49-144771da7f41.json and https://artists.proofprofile.net/proofs/artist/62548997-2078-4aed-aa49-144771da7f41.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 0x4eb0972ea7f22da33dd3ec18be5f06b272d24109caf842242f1edf79ecf8d300. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE7EV2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3efb308015bff9a3385500709746069e422201078b5e08309ee943aa417be. 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/SE7EV2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcde9843d40d21feb6125850cc9bf981acd139425d3f0466df073c39b05fda8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE7EV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6ec35348802d91447063efdb8292123f76fadd059c358db650ce754a4c64f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE7EV2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd0d1b71f7b162402274cb9cd4689ddaca98ef67df0b3f5392244b0ab365496. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE7EV2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c586fa064e2f078cc860543a8f55a602f5624bdd64370c9e689a29deeaa0828. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE7EV2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d0e1535aa64ec81cfb4e4aac5cc610aca5a26340a64c45ec49a494c299997. 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/SE7EV2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5783a086aed2f9dbe831a822d9bf1c7893e9e96f8cad5540b7b81e93a22d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE7EV2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3e9982267188a7308b6334ce5916a07fc391d377b9826050c42b83f116c815. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE7EV2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23894856dbce08dc437771762c0d4066d8380f7be42cc446e7f9ef35af34838. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE7EV2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd362ef66f03bfd4fe6bd37e7745190b133690d3a108c0aec8d3ee8b51ca9ef6b. 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/SE7EV2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f597c949562ee48147bb1d7f470d112b52d233fa0b9fdbcc6b722ec1fd3cad. 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/SEBGA1900676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f597c949562ee48147bb1d7f470d112b52d233fa0b9fdbcc6b722ec1fd3cad. 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/SEBGA1900676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b3e6507c2c203a28153a74fc8ececdb840ae2d0439af8ddcdc5517ee81a3e3. 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/SEAMA1300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87d8b60db18d4f646c6fd5df414325446f0f25bf920940a22e58933080abb98. 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/SEAMA1300470.