Brandon Walker (born 17 October 2002) is an Australian rules football player who plays for the Fremantle Football Club in the Australian Football League (AFL). Early career A member of Fremantle's N
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 0x9bb6429be0b4317d092e0100d84ae45fc0b2c728f7dd9eb88b0c8f7d250cbedc. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6415c3b-e217-43c8-aa72-7d7f3ba1a10b.json and https://artists.proofprofile.net/proofs/artist/e6415c3b-e217-43c8-aa72-7d7f3ba1a10b.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 0x69ceb3e9ba9b85e34861747b6b011c7031c9cb23549871616d7526588b84c757. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:40Z), 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/TCAIQ2478328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a9bd22e7277398bdac4f451dc43ecf482d5cfb22e07773b8c6f9d7f77566a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIQ2478330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb40c7fbbcb81b3946195b2bea540e40248c5cd8c8329e07195e2555476d290. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAIR2478331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf807945c8e916f0cb0796d1a812a0ca2a88652124ad5935ca8c2b2b19c23e2c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIQ2478334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5bffd0e6ebff2ceadf5a83f31dcc1c35b77ad41553b295d999a95143639e5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:15Z), 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/TCAIQ2478341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc786bb74cb64cda37cf501aba05fe899fd4c46eaaa46b129ebdd48897cd7db5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:36Z), 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/TCAIR2478345.