Nexx (stylised as NEXX) is a Swedish pop/dance band from Stockholm. Formed in 2004/2005, band consists of three members: Johanna "Jo" Eriksson, Robert Skowronski and Sebastian Zelle. They are most kno
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 0x738cc8f389579232a6d86af3f1be96b0902207599a7080cff3a2a6cdf5aa6f32. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff8180c9-12c7-4053-b833-d885870d9fec.json and https://artists.proofprofile.net/proofs/artist/ff8180c9-12c7-4053-b833-d885870d9fec.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 0x1d47b3319c5d6e7f9b52226863df3725d93cca0f9f0a5a2abaa98e75323babfb. 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/QZN882185679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f8529e9a787eb7ae6edc196c5e3d1c4d4da3916d4297cb9735c253faf2367. 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/QZN882185680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8ae97d1c7e666c6160d745a3d7392db7a45a728cf09bd673783bb2ca07d482. 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/QZN882185681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2857f25ce646a7dc8bfb76078d6bcabb500ec388c5233526411fcf29d4cf49. 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/QZN882185683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268978e6474953340ed10fcf0e48869627550d0256234d151c3f1f4491c2af1. 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/QZN882185684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543963dbce53253b16c0f8872399186c5fd360996f6fe2f538fde3c22a081c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882185686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e40b8fd916c17c65a73a185a54a6bfa61f38310486053256828b6f20b499e0. 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/QZN882185689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf352b88c2fac3c75a630833a30e713797be85afda7f6cd0585270b107b49e96. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZN882185682.
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 0x503585cbad84cc36a258f87f4174507af667e00a3e4ebc4146a2e9f8011d14c7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZN882185685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673dc53c000384584f1c191b261382fc6799287f2ce72b68f96771c96d672352. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZN882185687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dcedaf6918a241ed2345cc1792b9f778ae67abfa890362f21029947acfcfd1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZN882185688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7b6bac6757452fc2499a5b93ffd3dc1a3aaa17a7cc2fb7960ae4c4241adab. 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/QZMEP2211445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7732db10d9f0e51b198ba21413e757d1ffbc4d0f6316e12d483f0fb6e0ceec. 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/QZMEP2211447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1cb5811118f05564cdd363e9879c481566cb7b91b88c10abf9aeb8567ca50c. 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/SKP592100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0571a6a0a27e2ff109491c2a7399c1e90ef411bf8e63ed5f2cd5707939c0b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAW2436014.