Laid Back is a Danish electronic music duo group from Copenhagen, formed in 1979. The duo consists of John Guldberg (vocals, guitar, bass) and Tim Stahl (vocals, keyboards, drums, bass). They are best
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 0x78648c38e94b40e8212c00cd573864962d444cf695988fce44b27cd95517d796. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43651853-98e3-4300-bdd7-9ef83b135919.json and https://artists.proofprofile.net/proofs/artist/43651853-98e3-4300-bdd7-9ef83b135919.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Maybe I'm Crazy - Single original version
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 0x7d35b9b110134cd624782b27abcc4704b0ceb6c80950bf87afa173b65fd9180f. 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/DKFN70700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f94aeba444055cf518ff5beae90b781dd93d3ba589272f91438fd98c862e4f. 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/DKABA0002801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d9b40f889dde69c29fb3ec0ff5653f9621f4f5b55aba313c03a125887b555. 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/DKABA0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fe7cf6b3f410405f91c473995a6f777b6f6e0e9eb8b3587e12b604efb48037. 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/DKABA9760005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4874da30a5e3d532ec37cdf2f16dc11a3ec2fb038696a39ec7b67326b71432ac. 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/DKABA0800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa147d1c8a4bfa9d6271097195ee66f44e74eb5b8e4288f32246d9c3dde0d4305. 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/DKABA9760003.
High Society Girl - Long Dub Version; 1983 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6d6334ff5ca962ad6727df66b4a6f4fd8dbda10a0c8622fbc352d57dc50e3a. 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/DKABA0800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90dbe76748ca643ded7f3cbc46989bcf3a804d2839989326c6d41cd42486227. 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/DKABA9760001.
One Life - Shep Pettibone Velvet Spike Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e2845ed3391c4d86d2c3d23f4f40742df63014cbb5bac33f523dd5a7370bf. 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/DKABA0800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50e84ca65859675f69ac6abb9a4395eff303b51605c844a871b4c6013b886ec. 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/DKASA9802504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386b6b585dcc361f2429b0390224d0523191d975042a8ce62494e897e0844ede. 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/DKFN70700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1eeac81eb47273b53589aca7bc677c25541111bbf616058f16903259fcbde. 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/DKFN70700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca72d9e6408ef1c388b285e7bdcba30b1936246e4f415164afc08ab537cca9be. 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/DKFN70700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cacd3841cb842b1db43cbe6f6e87a52822ca60b3381864019d8d04fd3a0dcc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DKBDB9903106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed618fe901f99983acbf7ce007d0a5bfe45a0a66cecdb0b58de05efe5cf7332. 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/DKABA1200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b5c2fc4822deaf336aaf2349cd282efd32fa32a503e0cceeaa5d2dc0d9950. 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/DEGE92300029.