Oliver Sim is an English singer and bass guitarist. He is a member of the xx and released a solo album, Hideous Bastard, in 2022, which peaked at No. 58 on the UK Albums Chart. Music The xx Si
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 0x1b03de3d97dbb129bc5a59636de9ed763a26a6ea66ded6a582d5a15bd38aab44. 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/3942d657-cdc3-42cc-aac6-221a78b225c9.json and https://artists.proofprofile.net/proofs/artist/3942d657-cdc3-42cc-aac6-221a78b225c9.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 0xbeaa9a9b0725c16050f295f5e8c2b9bf04589a2c507a9d49c5c0ac308ef334af. 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/UK7MC2200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e86e426ec5cdd276d93d4147ced0aa025cf19c9878bbd52dfd0c95aa2025af3. 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/UK7MC2200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e86e426ec5cdd276d93d4147ced0aa025cf19c9878bbd52dfd0c95aa2025af3. 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/UK7MC2200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92121b1029d21f3a57b3188379db177fb18694727e99f0573afa472fedd28032. 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/UK7MC2200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e49bdfb7bef7869c124c6d75ef4fccaaa406637e161c6c4f2be0c610d92880. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UK7MC1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17f32aae5847dd0f898b6158b2e576c38e3c1e7a5113a2b44344510f849b60. 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/FR0NT2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ecd9a3bcb03f25d0b8d971e3896fdc41e7a523930eff145de050ea93de1dcf. 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/UK7MC2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ecd9a3bcb03f25d0b8d971e3896fdc41e7a523930eff145de050ea93de1dcf. 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/UK7MC2400052.