Dundertåget, originally known as Thunder Express, was a Swedish rock band formed in 2004 by Robert Dahlqvist. They released four albums before disbanding in 2011. History The band was formed by Dahl
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 0xad9dcc34594bebbff6611888e4f903f48bc3e2de930fa9feaf59067e673bef07. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b282090f-0662-432f-ac6a-26577f1c919a.json and https://artists.proofprofile.net/proofs/artist/b282090f-0662-432f-ac6a-26577f1c919a.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 0xe3e279e1cb6c0be0a46c3dcd82f292ccc0b3d857cb2aa8a8d42c0487a66b027a. 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/SEWBD0800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde670dc6d0bb28adee0894b9f0ca877ab2738c2e7edc886ecead54109e9d62. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEWBD0800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7237aec1ad2050e6e535a565fbfed57461990adc561f7cbf51301f537d61e90. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEWBD0800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa642d6bf5b839a758dc75aac9a776dbc521c08c0537057abbb2e0e545e28fb24. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEWBD0800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67eace6f3594c8256b6cec294c43ecb123117843d00cc13bc8415f8efdb6cce. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SEWBD0800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f28a72ccdca9397708feeca3f11b4ca52c4849014c5782a96be6d6c873ad1. 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/SEWBD1000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f33b2464c3da2bbc8c320efc26354db4ee65628c4ebcd32537cb46855fe942. 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/SEWBD1000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3754f6aaa2f319720d33f1bfffcc0893e02e3d306f35a5f39c1bfc46ac9f74. 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/SEWBD1000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60688c9c71405e006bcb549e69882db6ea5edc50529b19b6727e5923931e91e3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SEWBD1000103.
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 0x92cbe15aec27499ff71e078381443ce9b3bac796b1676d4fd445a26ddb97b1f7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEWBD1000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5909eb466168f0ecd15862379cf9ea4376c375c9ad9252b2b07ef1f4867dbd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEWBD1000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb96b52123a02335305f0e9361f5fe5eb857bad6d58f3e6f5d165ab50db9866. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/SEWBD1000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b390bf8c68c447a004fdde9d752713330bf4d99bbec7d9cf9fff1e46ed2d9b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEWBD1000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a1130dc434ded408188680282f800c0706e3c7fcbda1b1b080801919fd5672. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEWBD1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074c977edb0a303cbc3f0b2d48e7a576d6adccad699c94c2c58f7c063732d56. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEWBD1000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a045d0bcc786f0b76c58748ca465582cccea75b9dadd1ccea9dba45bc3c02d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEXHE1300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0320ab81fd676338fc2a2f6450a80943fdfa1f1713cf19637a271491a77c5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SEXHE1300102.