Slapp Happy was a German/English avant-pop group, formed in Germany in 1972. Their lineup consisted of Anthony Moore (keyboards), Peter Blegvad (guitar) and Dagmar Krause (vocals). The band members mo
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 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 0xc453627f56975c7888bc278168403744fbf65d55c864cb1fa9db6713f02727be. 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/a0ff531f-7b95-4bcf-9812-d59e59340306.json and https://artists.proofprofile.net/proofs/artist/a0ff531f-7b95-4bcf-9812-d59e59340306.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 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 0xa8658d80c09e90e23e82f2f26f42ecbf5bf9757303f3dda12510a44fbe47cceb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEU161503546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33914c7d02ac004124d852dcdd27fac2d8f844feacb06b9d01ada33389aadb57. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEU161503547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b2035cc01aa4f0ec75e2ca7993313793b10c1df0eb729f4f95ad57cc5f65d. 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/DEU161503548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8691fdfb47ab7ea74a8efeedda0977263660c6516f409de98eda6d65ce26018. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEU161503553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630c9ef482f188ed2034f2dc318b613ed252c295b5aa6145fbf6d4a9902573a6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEU161503555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349dda8cd215e8518a27f1b5569fb7af9d7a07d3d910da1453075e03e48d94ef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBAAA7400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f2143d5befdf09729b89edb4f7ba6df945c28061ce01cbde7ada73ca07e956. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBAAA7400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36eedbdbd31c83b6ca241576fd84e9e24d9e3c61ae707cd0e49d11f1790a7a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBAAA7400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ce37aa52e9a66495618910ef45b287cfb5e0e884646234532054cb723e33f4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBAAA7400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed4893ee90992a881a72cd6e9021cf09eb44652765441a8ceffd46954fc75f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBAAA7400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b6182002ffe9dedce0080dedd2145dfbe8c7a142c9af50c48a9d272fb5aad. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBAAA7400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287caeae15fef89ab9b42da5f3026c0a9a2c84055e546757c1a29b4f656df2f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBAAA7500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6403fc3f84cb9fa0e085a80b1727ff8268b67e21d746cf5b48ba23df5e3f09. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMDA72359321.