Spring King were a four-piece English garage rock band from Macclesfield, who played at SXSW in 2015. They are "a small-scale, art-pop-punk project based in Manchester". They began as a solo project i
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 0x74d0e5310478a2967dc42ed612be60c0a316b08a4dcbd65def6fd9364e3ece0b. 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/ab0e1bce-9f4d-449f-a348-5e9e44e0ee8b.json and https://artists.proofprofile.net/proofs/artist/ab0e1bce-9f4d-449f-a348-5e9e44e0ee8b.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 0xe5bec120451c5d6534c68be675ea7d8c16e13ba310b1b54f6df0d83a4c696782. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBUM71600188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8c87d169549d6ada7baa39a7585b3bb062294606ff062a970588c53179719. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:43Z), 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/GBUM71600189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55237fd54b9a347e3a126a37bdd3bc2d6ffa66bc80719abb13070440200d2fa2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKZV1424922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f6c65b7839c3d087f6db75cb20eb171c04af51d29a4c432d318aa4c6ac73d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBUM71801174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f6c65b7839c3d087f6db75cb20eb171c04af51d29a4c432d318aa4c6ac73d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBUM71801174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d8cf52beaacd12a54450c6a6072918f10d4475a62af5f1ae26adf8ed0582e6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM71801298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2346998d1db9473a0efc5a57399bd2a11991054392e55efa6cc90757ba47a5c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM71801297.