Sebastian Kornelius Coucheron-Gautier Teigen (born 6 January 1994), known professionally as Coucheron, is a Norwegian producer, songwriter and artist. He's worked with artists such as Kehlani, Unge Fe
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 0x6ef3df8d826706f085e5ad23185668a4cb74605146b50a07e28133efdf3a80c9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20d151bd-a46d-4db0-bd77-077e4117bc93.json and https://artists.proofprofile.net/proofs/artist/20d151bd-a46d-4db0-bd77-077e4117bc93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Deep End (feat. Eastside and Mayer Hawthorne)
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 0x3178a1dfeca78453d13fa91fbaf126bad9846f39f7d0dd8ec96e988953b3c0b8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USAT21401781.
Deep End (feat. Eastside and Mayer Hawthorne) [Hoodboi Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d5497cb0e7eeb9796521077f5254dd8a47e832c8be06c09772969c2fc2f139. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:39:28Z), 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/NOCKK1615010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650685b31f02f17a45f182fac5bd7eeb660e303b7e31645f6cb6106b443fcedc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NOCKK1701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1583c815ad4f3ea926e0b19b7c8f60436eb6bb762ea9ecb9271d74dd9589ab. 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/NOCKK1713010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41c14253ccdb9d9c20b58bf954f9573fa90be9065d2255cb7131efa1da74f97. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NOCKK2007010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358ae564a0300c99af6aed1a461095c97438a69d1c24e631ec0cb5cf67592a20. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOCKK2133010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e67d7186f8b43409059dba5deb0ad538eadbd3686040378a03a91742347bab. 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/NOCKK2421010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a86f36c1beed94757aeda7e63f53b079d7072d6005d9009622a5a48aed001. 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/USAT21500705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e87a905eb2094c262779135e8add455788b4f3465e7f630c708ff4f085b7fa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAN112000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675160ce461ed50b5c6f82c1db265880109142c3e358aa4ba631c03febd9ed15. 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/USAT21500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76583f1785282e2a066eeb0fc462f04a6e44d255584ea9cbc35e79c8e59f9746. 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/NORN72002020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ecfd2fe5ec59df89c1dd642585fb953d9ae3da7a6baa428e7b9ea3519e5a32. 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/NOYKL1805010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ecfd2fe5ec59df89c1dd642585fb953d9ae3da7a6baa428e7b9ea3519e5a32. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOYKL1805010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0dce4b32711971f3a7db446f8db8de08cf4feebc3b558c985f682fe457a51. 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/USUM71704558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645dd722b3132984ee01688b7198a70fe4cf415e4cc6cf06164129fa9029736. 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/USUM71602176.
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