Kristoffer Castin Åman (born Kristoffer Åman; 30 November 1996 – 6 April 2024), known professionally as Dutty Dior, was a Norwegian rapper, singer and songwriter. During his career he was associated w
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 0x1b7db4c34ff95456fda1ea68938d1e1ce63a23eadc31e0873f462cb897f6b480. 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/02cdc721-285d-4680-9696-c32ea04bd1f3.json and https://artists.proofprofile.net/proofs/artist/02cdc721-285d-4680-9696-c32ea04bd1f3.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 0xa9108998b8692923eb23a3054a41782f8a7117d2e900c97a6378ec1d735eb8e7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX1877934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab7260ca76749f067843e8d84a8382a06b40c2f75d89593d6ec87c0bab66e29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N21878855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc13d1baf906123f6ec713281007dea2845148da31cae10614fa9d94e81397. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW1952536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576b15ccb316c84281b9f419f320f72ec500d95f2dd42acbad750bf0fdd5a821. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW1952540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd794f61b3a3d2a9259e71b48d923c19a9d2a3c1f47ed34b00d54124fa001976. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW1952542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a2796595f2058c858383d2fd8d3dbc7c2089631a6a10300c53e4324e8b8d3. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QM4TW1952543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977e82fb5a7c33ba770a3f8e9f942cb7edc45c94b9196fc134b84b90f60a47b7. 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/NOA7Y2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be495c3c29a54ef0edd65509801ac794128510c6d0812c0110caab0e9322fb2. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NOA7Y2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce17c6e9a2e80068b96b56d97cefa3cdefefd52c96584f8719c3d900fb0ac26. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOA7Y9300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc642d2ac63b667a982284754d47e9b0a3ff7124303c6387b16a5112378388d90. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/NOA7Y8900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11adacf0d7dc01630a44743e75c003a8594923517d6b70f97315d949e3db5aa2. 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/NO62M2201420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd98e6629946531be46479e7356652f4f5347813409746f358ea7ee62f193e5b. 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/SE5AJ2101524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f80252f1f8da266cefc5797e922b03551ac73422752ff9da3aa1aaa4b82b5c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOXPR2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1931b883d1cab9031c63da728792043cc3e3f0c626e463d66d989e868ee6a780. 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/NO44B2301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cec6f0ad4c1ec0cb8a785b4eb5a1951a763c72e33ef27a110ac17605b775e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOXPR1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cec6f0ad4c1ec0cb8a785b4eb5a1951a763c72e33ef27a110ac17605b775e0. 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/NOXPR1800008.