Nemesea is a Dutch alternative rock band formed in Groningen in 2002 by singer Manda Ophuis and guitarist/songwriter Hendrik Jan 'HJ' de Jong and shortly thereafter completed with Sonny Onderwater on
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 0x5e92a89d56b9f0dcc9c6f549b7daa58a2612960132bbba1d510377117d58c8ab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2568755-b15d-4a99-83e0-408dd2942ea0.json and https://artists.proofprofile.net/proofs/artist/b2568755-b15d-4a99-83e0-408dd2942ea0.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 0xfb4432a979cbd5b80228d274ce7b59475d5a1ec7f1510b99d90b990ca888a889. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USTCE1089415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7304cb2c1f3dfec1d0f62af41211fae8edb4b4478e04cdcb8a46bdda1c793346. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:33:42Z), 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/USTCE1089417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067f5220ff9eb099a10d1bfc4b4076ae43794b1beadbe0845c5d91f4f9c79a35. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:41Z), 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/USTC00950926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf556acbd1b002cc7e74e139f67c0c140e3b56cfa500020315ce1b30ef697476. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USTC00950929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7005040616d2f49eb7a8869573aa85614558ed0985f3124e7e9c57f02e4fd995. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USTC00951011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b5282c570847ca16c2d82cfaf36796a7a6d562cb6b189d9d06a7bea5584a33. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USTC00951035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0229dc3e3a1ab5e6ea6650197f8db87cd22580981f3a16c3b019b46b417a5d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:32Z), 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/USTC00951047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c87fc73c601c2fc326d25ea033e588a2602c1d7e309f23840b0c2b36f7bde5. 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/USTC00951122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1554238035087bff59f26f6553390fdcf82d0ff3030da688ad36474d3083ab80. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/ATN261138504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3debf433d50a7ae29f3a3cc1f7272ac8eac105f0dc515fb0a3702c82525f850f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:15Z), 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/ATN261138505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa2ab7e7242d5f6ffc15dcef5cd31628f887ac069757b91a0b773ff98998b9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATN261138506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ba25b138af3a44a7089ccc3302d54d71819e71e04fb3c0f8cac44bbc8bd99f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATN261138507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7cc5b45b6b7b898b656d6d0cb55fa9fcfb64f3226518eb55076b968cc2722. 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/ATN261138509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb518facf37f6d008d28985ed2f3e010a19280b136356abd58df5715e4a078781. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ATN261138510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95bd101c14f52725b7fa1e0fa4575310ba168c1065f4a9c28fef0be0cf49bc9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATN261138511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43cde158e2e0a61d3866042e194f7ccae8665c3d1022118b3147d499759efe7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ATN261138512.
The Quiet Resistance (Snippet Promo Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f879f4ab46e83629ee356a368b7c92c43ce9cc3a91a31305d9a3981aa9ca94. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATN261663803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2ece5b837a08ca9ba5356cb8b323557102cd2cd7bb1da53a9af0a1815384d. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ATN261663805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62423bf0da13b17ef54cfc084a6730da4cac53ce559b7355b318ba3c8b85c61b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ATN261982302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48283bda31de3665111e24e3da943750e6c9a7976dbde3cc7646beaec441fceb. 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/ATN261982303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb743fd2be293fc6269dec65d1195682d52c8c2dd2830ca25f9cd6e288759e81e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATN261982306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4aee988820ff39f489efaff77da26f4446ca60cb1b27aec1b508201537526. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:52Z), 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/TCAEO1944381.
Save Me (Feat. Sanne Mieloo & Charlotte Wessels)