Per Henrik Schyffert (born 23 February 1968) is a Swedish comedian, actor, musician and radio and television personality. Career Schyffert was a VJ for MTV Europe in the late 1980s. In 1992 he hosted
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 0x38504d8dc8767e299c94255eb0b957e7acb6b019f808bd86d43d130ee028bfbf. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6dcd721c-b9db-4c87-b658-db9d365a71be.json and https://artists.proofprofile.net/proofs/artist/6dcd721c-b9db-4c87-b658-db9d365a71be.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 0x0d798db8bec036b0ec95751492b7057f05d28353241b024cce42fd0adca6addd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEYOK1703763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058bcf10ff47b773860e4b320ee79facf87ca7f99a2ef57fa50f6b2c72e57629. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEYOK1703764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc304cfe65d211a24379d7ef607e2bcdb82a308e3e486c0b3d83cdac2f0f46da7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SEYOK1703765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f618e6002d0990e7740a97045b7282d9d2cdf846115837b08c670de17cc86cf. 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/SEYOK1703766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2807bdad62bf9fa41503b39b93900882a17c094dff20efde91483a53a6e8e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEYOK1703767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad1d7c59f691192bc7cb4ae96988998b1c755f11c537d131f40b0e6517104a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK1703768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500103e71c500af387eb4890ac5019328c9b3f09747a511889b02c718f8254fc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEYOK1703769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7523acbc4620a676c06867087e4434fc973e2bbda30a91690d9e642e3711a2b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1703770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a1b0f753ca9588daf93790c302c9cbc5528d766018e687cb4c74772c3318b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SEYOK1703771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b87bc45b13b034c1a28b58cfe78c70d78b87167567bebee7e1c42aef1e9bf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:11Z), 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/SEYOK1703772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fe3e7fac23b74d5225bdba6e6ac506ec4c3061975bd28a5b9dafeb41968d30. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:35Z), 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/SEYOK1703773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d70dcd1327cbb1a96d20546d85ec30ff9141a372c20e3d697203a9268f7f57d. 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/SEYOK1703774.