The Nightblooms were a Dutch alternative rock band. History The band formed in 1987 in Deventer, The Netherlands as a quartet of vocalist Esther Sprikkelman, guitarist Harry Otten, bassist Petra van
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 0xd5db33b88e7194c791f58d3d5e84a0b1f0170131e8f6b8a27f81c302031b135e. 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/4d8623bf-a7d2-469f-8a2c-fa540fe2efa5.json and https://artists.proofprofile.net/proofs/artist/4d8623bf-a7d2-469f-8a2c-fa540fe2efa5.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 0x3f3faa6c60aaa1540eb9687988f5fa6a2bb507941c3bb6f79f95cdd89cf0210f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBCKK9306601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab1ad038971014cf9e46b2b2733a3a7c073e66dc3a6cb22e405071846e03d3. 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/GBCKK9202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacedc32de7d06e079e5af8ff3adc4116a4108fdc52768b2bb7690ccead8050c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCKK9202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6891282ea6f9b8843161d5113f63c36884760c1a85e7796bc8a7fc879bd7ceda. 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/GBCKK9202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb0214284d582b9ca0fe173f86510a37efbfe8aadc39b77e9038f7e0913f011. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBCKK9202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e5e583359f3efe1a0e97b519ba26cafcfab6922877c17f50bf1145a1468c3. 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/GBCKK9202005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f5dde99b1199ffca6cd03872aa51006a352bda7113393ad821e3a2a04d0b2e. 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/GBCKK9202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf9379c7268e0da8bd3604a3778ea0d1c4c9588c1e218ec2adf8c28e5040469. 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/GBCKK9202007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e1d40c6ed384c523e209833d37296cc0ab86fbbbb8d1017f70ec0099c1b696. 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/GBCKK9202008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0807cbee447e396c83eef256f83762c8b5510cebcf3f8daf9f26eb3de8fbee. 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/GBCKK9202009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5d28580a38c7e18f8993d8fd555e1c510bc61494ceff18e6878cf0a2b6118. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCKK9202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3faa6c60aaa1540eb9687988f5fa6a2bb507941c3bb6f79f95cdd89cf0210f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBCKK9306601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6891282ea6f9b8843161d5113f63c36884760c1a85e7796bc8a7fc879bd7ceda. 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/GBCKK9202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e5e583359f3efe1a0e97b519ba26cafcfab6922877c17f50bf1145a1468c3. 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/GBCKK9202005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64a337bf0c17b5ccd5b9ceedeb82bdf14effc1ce2c8974e12ce5f29d3c50b4d. 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/GBCKK9202100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8518d428053d13b6b13a6c47fcfb4c9c7c6861f2b488f46a5ab25714f46ebfd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:11Z), 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/GBCKK9202104.