Guusje is a given name. The male variant of this name is "Guus". Notable people with the given name include: Guusje ter Horst (born 1952), Dutch politician and psychologist Guusje Nederhorst (1969–20
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 0xefbb1f546a531c96f32bb3460ab29b78c08928c00317a830d18e515f68ad4311. 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/adeaf7a9-24e5-4109-9ed7-38cf8615195d.json and https://artists.proofprofile.net/proofs/artist/adeaf7a9-24e5-4109-9ed7-38cf8615195d.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 0xd2c980bff7dbffe7c46fed16ce902ebb05a2488e92bc431ae9f4cb1fed6475a1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:43:09Z), 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/NLUM72000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa51f12e6d0ca885e929d4cbdfe3407d98aa85c62ca965bdddfbbe7854973d. 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/NLUM72100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c980bff7dbffe7c46fed16ce902ebb05a2488e92bc431ae9f4cb1fed6475a1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLUM72000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa51f12e6d0ca885e929d4cbdfe3407d98aa85c62ca965bdddfbbe7854973d. 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/NLUM72100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ebf342a9cc13ade6c5e7620200855ce371e38c72c9a93f427ecfafdf10ca30. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:18:43Z), 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/NL6TB2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386b8f6c277167dc48eb94fa47b40b3df0ef566bb9a7ff954de549cb21e1e6b3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL6TB2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57557f15ebd154c7a0ba5afd77e305e13c11b86789c90c8d3070b7dc933689. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL3AA2250046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb374e0f31ad705c6d0e59bb54fd40058e843f64598a0a5a674a82c6ea000eb. 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/BEMB82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4310f8507bc7fdaa47efce3dc286b643bec3d9206b767f87f645afb11ecf85f. 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/BEMB82300002.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b7201add848ca433a29a50135dc61690b6079e6c03d41418cab8b3a89653e. 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/BEMB82300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d6dcc653874dddb145fafeeb0690f7761f187d99905a56db3c67b95ea79713. 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/BEMB82300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5646c2c620257e91da9b96bce0489d5384da3c1710436f217a688c5b6860ca8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEMB82400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb502b3895755f1f4949308ebd102d5ac535d80bbc9081f7a7fa1627c6ad312. 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/BEMB82500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95c137a4fc7e2bbe8be76846bb67476580b64191e5dae6bbab4f23ecaa5508d. 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/BEMB82500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022779b8bc8bf4f16d21420f7b7e71bfeae426cb643a5049469e9e5f3d36758. 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/BEMB82400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5646c2c620257e91da9b96bce0489d5384da3c1710436f217a688c5b6860ca8b. 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/BEMB82400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd317b907fa771b10c7bbb43ce32d4d10f7c8a50dc50c64042996674910a90. 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/BEMB82500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9d5f0fb7cc9d4a8de5e1733a42bc6be90340b62b89eacd32097e324d2a314f. 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/BEMB82500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d945de4bf1e9fd310be6f9fda1aab5806582bb96e9610bb9263b3cba22b2ee. 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/BEMB82500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4310f8507bc7fdaa47efce3dc286b643bec3d9206b767f87f645afb11ecf85f. 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/BEMB82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb374e0f31ad705c6d0e59bb54fd40058e843f64598a0a5a674a82c6ea000eb. 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/BEMB82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce4c0d96ded75c627fe243040f24d9a243df5ea908ebb55a8222d2a42d2f96. 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/BEMB82500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2cad7e7112c4a0c2397c4d12199d29873adbf55b9978e428a56f0828b3dcf. 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/BEMB82500024.