thumb|Espen Grjotheim Espen Grjotheim (born 20 September 1976) is a Norwegian singer and actor from Grimstad, living in Oslo. He has participated in a large number of stage, music and television prod
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 0xf549f09413a5ab8fbb53807ec16fa905b170348966939edae0e182abc1dd31f8. 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/67c19ab8-9325-4011-bc64-c5b42bd3bda5.json and https://artists.proofprofile.net/proofs/artist/67c19ab8-9325-4011-bc64-c5b42bd3bda5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Spare skrift i sand (Slipping Through my Fingers) - Live
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 0xa26ed865cdbf58178a035810a1d5128c5bd6a73d184fd917fa21dde6c66d59c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NO2C91901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c1d315cd403fa44e5269780f94a4442b61ff3f959e6bbbc634ed9b1d6eaeca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NO2C91901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435961fffcb73c233ecffb8cd84e8a3b9cfbfc2667dbed02f7074b4af44f6834. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/NO2C91901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500b6f5c742460dd5014fed08b4f31eb8aa5617afb4690e42d4d4f26138b6ac7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NO2C91901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf330dbc88b3b9e2d4d561b73ae50ba95b6f15849d9d029c84e2474a8b030e81c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NO2C91901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda63813ec8e343036c4c8eb67c7b1dd40d6107102a3e9e0664e9341138a7bb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NO2C91901060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb13f063b328d06d0350162bb7c5543a7b9c4e754c9b519503adde4b4ab6307. 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/NOUM71101606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61f7add034e1ac698bcf9de4d81afa3544e6d2908421d7ed4edc3709d661757. 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/NOUM70702368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31927d1111fa00109b376713844899b03b4677f7626bfab6fbc44473798e6ac. 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/NOUM72100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff990acf88e10acc403699ac1f7ff4fb851d46649bdc1cf4238d6032536efc48. 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/NOUM71900102.
Live At Kilden (20th Anniversary Concert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12457393a318e30af9c0e768a2dc6170615366a1b27aa719271211991c4779e. 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/NOUM71600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8450d0b8d895be4821abd2cb578ec8a095b407e18fd4e6e1a9db1a2741f7b64f. 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/NOUM71600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3161734794d967d4c24fbcd205ce2be6fcb78d12bb11548961a4ceee7b2eb2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOUM71600411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73afd305460c5daee4de52faf74efe0e08b5c5bd3805b26930b6682e8a2549a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOUM71600413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb13f063b328d06d0350162bb7c5543a7b9c4e754c9b519503adde4b4ab6307. 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/NOUM71101606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31927d1111fa00109b376713844899b03b4677f7626bfab6fbc44473798e6ac. 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/NOUM72100190.