Kim Hoorweg (born 9 December 1992) is a Dutch singer-songwriter. Biography Kim Hoorweg is born in 1992 in Utrecht, but quickly moved to Rotterdam. As a young girl, Kim starts with cello lessons, but
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 0x10ad3b55d0cb170516d9b8bad276bd7c9db1d888adb1130fb091af9a5bbf17ff. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64706b89-cc01-44dc-b856-8fead6f04776.json and https://artists.proofprofile.net/proofs/artist/64706b89-cc01-44dc-b856-8fead6f04776.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 0x2b645f8b36508953d1b67bbb7330a5ae11901d71633a30809c55d6be7cd747bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLD441700743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271e03ea0aabcbdf9c201c5a8417cf0a81da86d49b150f0b21c83b6f0b3018e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD441700746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88014a61a417de0935ab50d252bac98b7527459d3691fb9e22065222ae8338bd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLD441700749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e3812934bac022ee4777e74e9a3ca0794c28221fecc4f812b1bf36fdbfb13. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLD441700744.
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 0x8cea3e3284f74e524e995ea4b0f1fba85df042368736a1ee4c31f9bcdb5cb19e. 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/NLD441700748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3c128b331d3f9a674357b88e8f9df24bd0edd10f0344765a9af2990b21505. 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/NLD441509902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecc8470ec5db2d508526b504809703aa92bd6a778bfcd2c0224593f6e0637e. 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/NLD441509903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d69f257dfd057daec5d80d1737d0d219c5edd420946d230e4549eaeedb622d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLD441509901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557d4851e373d79c8a75d9539a8f6daa5b9664b9bcbf6302434c0150ef195f5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLD441509906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c88a9a93079c2aa1809d1d6cb8b9a8abbb382849d1127eca80af6ce15fa62. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NLD441509904.
Why Don't You Do Right? - Remember Peggy Lee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b93bce4871b893d256710e129f508191fc43600254a8644a5ac0fc51db4030. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLB151201307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d92f03fa11797332f2131f1f2fd62f3caa9c012ccfabf725e276e0240fd02b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLB151201304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bde5fae6a078bbb3a767e2087a1f5c8239780159dfcca32050cae84936a24c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLB151201305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d877e2590109d166182a59ea5431b25c9964d45ef41df74c0a2164d3e9713f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLM601600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c871274b19c41709901b57247fd3ce0fa9da43a96faaa74b6be7cafb596be65. 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/NLM601600003.