Gabu or Gabú may refer to: Gabú region of Guinea-Bissau Gabú, a town and capital of Gabú region, Guinea-Bissau Kaabu, the namesake historical state Gabu, Nigeria Gat Andrés Bonifacio Universit
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 0xb284a3ee87aec754bc3c420da5f7025236b71476931186d5e36380271dc80ab2. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1fb2255-233e-49ad-8971-0f17bd26899b.json and https://artists.proofprofile.net/proofs/artist/e1fb2255-233e-49ad-8971-0f17bd26899b.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 0xca5f2576188f3218b95439e5dc78a0b49b78aa1e0dc9bfbee39dcb795a904dc0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH7812231728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f9ea1019fe217c817bbaad08780860d8bd270aa01a922f34213a7e58857075. 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/CH7812424768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ea26e1c003bc168d6a76fa910f35a67e6f0359d8afcdb80f40c16ef32a291. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/FRX282575609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38269e121a8e9a5572b6b9f992ba5978639e8209145672cfcfbd5c67635bf337. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX282575610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eb22acaceaf6d78c97c35a361c20813e91b62967ec69e819825eec1de9e49d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282575613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0ff3131297b0c43bf406fecc6ea5cb8d5057262d3302dc2f214561a39f89d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX282575614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7663e5202dceecaa1419528dbff7e3d86cb70eae5ef4de09b3a8652e1a03df. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX282575615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b844d976e460a01db93fe5177682091456d15297b78fbc2bd5e62834dd3fb4. 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/FRX282575616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c8010bced9a92878d5ef61a36ce88fbc2852476efb1d419c0ce2c786833a3. 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/FRX282575617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bee52417a30cef66d9d55fda4d222012f4b582a0b1998a26ab9e3f4a3865974. 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/FRX282575618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba4fa523e711b68ab355411964b598d367976178b4c600637c006936d803f3d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FRX282575619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6073cf9ba2cc49f902892c54405444fa1158202099d89f71adcd4ac4d23bb3a. 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/FRX282575621.