GB, or Gb may refer to: Places United Kingdom (ISO 3166-1 code), a sovereign country situated off the north-western coast of continental Europe Great Britain, an island situated off the north-west
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 0x4de8a7281a05bcbd38a9f9d3647bb93700e78d85fa2e28b349e659ce1dac36cd. 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/0a40a68b-11ee-427b-bff2-b12565d5b6c3.json and https://artists.proofprofile.net/proofs/artist/0a40a68b-11ee-427b-bff2-b12565d5b6c3.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 0x703c6869e6ef2b65793abd852fb079f9a71b2e28bca81bf4873d7eec74263ef3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCJPH1862638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee01a113b828881b5549d4b00cb246ad05fcadc2435b0179645273d45455bcc5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPJ1929655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e25fe573b02768d9a8c2a10b34cb1e9b22fd0a945dd3c40b502e063e9962e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCJPM2035677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4b678a2ec235588e9163cf93eab40f1d9dbc9dfe7a8d7b3583ec6aa45da9b. 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/TCJPK1911482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d53606603640c793ca8ec5db7ef464f051ad874492f3b32b85c5f5ecc425e8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/JPB602093997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6500513e7b5b5947f6ecd27201c8bd5133fc8f2cdbde2c0958cb56c2bbd02b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/JPB602150696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42cd6b2dc30226104f18872c7dba19e8a49d7b77a32708feb823b5df758cdb7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPL2007466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f173ea1911efd2472117712575bf72261d17f39f2efe9a4508c20c6fbe348. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/JP92N2247686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536f1c7cad02c459662e36e2bfecd58190e19d827b37086ad94958ee867d7c7f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JP92N2257464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4858d778d9c90477bc07f1dbc700b97215badf60273a40f8f1b0ecd466c5aa93. 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/JP92N2278405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09da4e06093011f96517df90d0ebb838eab5bb1009a770990d42c162fd2b97b7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JP92N2331490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe82bd458db49bc8c5584aad6f572f0205ca9adb02c1f0a0983cbc25526b7c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JP92N2363345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16da82009095a129dd5c0a29aa448a134b601237da0cd087827496097124a0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JP92N2409932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b86b0a8a6949f148b1a86edb8f971a7313ce1dee85732b4b30bfdb0ce35c7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JP92N2450654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18abc85734864c4cf8709c2b3b15b5d118fa59ba664ba7b3ffdea590f33e5012. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPV2382303.