Mark King is the name of: Mark King (musician) (born 1958), singer and bass guitar player with Level 42 Mark S. King (HIV/AIDS activist and writer) (born 1960) Mark King (snooker player) (born 1974)
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 0x487b580898fdebed1ad0c46aefe3d3e95a60f5e1b355665a2119d7a6cf395eb9. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56d13e24-605a-46e0-ae0b-6495418f1201.json and https://artists.proofprofile.net/proofs/artist/56d13e24-605a-46e0-ae0b-6495418f1201.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 0x39648480769bf5c16db73181fe78d26db0767dc9d556057992e6ac5eb80ba251. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBCBR9800001.
Grupo Mark King Live On the Isle of Wight 2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f891f83e496220c355631f5b25c09f51c375285a421975f7d97afbe284f1a5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEH842000483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a281ac525342f9949d6107c55d5dd78a2f4d6a2c79f878aca147fde4bb491. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEH842000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814979564a3f744f1a078bb98ac296d57ca78c6fb4b91737bf3736647a1863e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEH842000485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe737ceed978dd0928b0cec0f1153e7eec8fa37ba39cfd95ef78c0e6abbd805. 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/DEH842000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f40bffc2ec04571b662aee08c3014e5c0193248177075173e4dd39f7bd924e. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEH842000487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4dd9b5f8cb99be4757c151b2bdabce977308316f10360dd83767bc1569f226. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEH842000488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0a45c99e49d4a10ee52dcad1c87c08db5f031d2c307de1376ceae8091c432. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEH842000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794114e9df877f1077c32fc065f7e5adb25cf003a4546f6d01ed07f9d9b3523a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEH842000490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848f5706dd71d48fe89e53129fd5b06d36e82d06025cf89cab8bf27151734a5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEH842000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb80e74736a6ae3fa2edb3e4797e95aed5b966424080043c6ef3706be8bd3e1. 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/DEH842000492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b39e1630ffac65fa98907bd4b0c6bcbdd20bc2bb9df949dbafea612159ce1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEH842000493.