NSG may refer to: Businesses Nippon Sheet Glass, a Japanese glass manufacturer NetWare Systems Group, Novell's defunct operating system division Government and military National Security Guar
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 0xd7d6e224aa0b62a5880490dcfb16b51429cbddcdd562b888625fefb3ccac36a5. 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/6a0152a1-8ebb-4a5b-b9bb-40aad513e807.json and https://artists.proofprofile.net/proofs/artist/6a0152a1-8ebb-4a5b-b9bb-40aad513e807.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 0x4243b22dec6b7c81cc8cab8c66e9dd5b74fe6a35971427db9a9e4238f58076e9. 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/GB45A2300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ab01ace9b617c114f46e459385abcce011884a4f1485e80feedee9d8a5560. 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/GBAHS2100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fb15fc7d92098a5c17ec4023401e666d4da127f556fb45ec185c3da69d6a4. 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/GBUM72101617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5443578eee2608c8c43d41a28c89eaa335e5c11160968947fbc6f8388f96e1d. 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/GB45A2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaee04618bf25e1b77ba5c36dd9614a537bfa5cd0fac09f53a8c08952aa079d. 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/QMDA61847392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e039e40f74c0c19d481768698a6cf282141c4e3fb4982070c7ee8f2bd436ad. 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/GBUM71706043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7f71cea76cdf3e0e9e057cee1daa52d0048d3cb30ce3d1dc7c6127dd8b317. 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/QM6P42319660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdeb7de6750316581f58960ae0126c2859134fdee2bfa7d45166d450082c59c. 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/GBSXS1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7317b69a50364cc4803d6e618fce42bcb423db3cefb5466c7e446c14b4848584. 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/GBSXS1800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdeb7de6750316581f58960ae0126c2859134fdee2bfa7d45166d450082c59c. 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/GBSXS1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2762228d22179218db6ba362c36a4a0b1d7e9f1d1c00643bf18d223301419a49. 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/GBKPL2030676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fb15fc7d92098a5c17ec4023401e666d4da127f556fb45ec185c3da69d6a4. 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/GBUM72101617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafec7e064ec73b87cc1190b84536096690a5f7a1c2928889e344c6d5049c883. 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/ZZOPM2106706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafec7e064ec73b87cc1190b84536096690a5f7a1c2928889e344c6d5049c883. 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/ZZOPM2106706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4243b22dec6b7c81cc8cab8c66e9dd5b74fe6a35971427db9a9e4238f58076e9. 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/GB45A2300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a97879dcd5b4ae8a4cf5d36e07c016b4acdc44946878e35a3cd47eee4d519. 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/QM6N22282703.