SFJ may refer to: Saphenofemoral junction, an anatomical structure in the groin StarFlyer (ICAO airline code) Kangerlussuaq Airport (IATA airport code) Super Formula Japan, a Japanese car-racing
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 0xd69214341b3732cc2591431d4de6322ebe188318798b7d43e3cfe71543f388c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7b7b15b-3291-4cf6-9c65-8d8512268a56.json and https://artists.proofprofile.net/proofs/artist/a7b7b15b-3291-4cf6-9c65-8d8512268a56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Double Barrel Hangover (Jagz Kooner Remix)
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 0xd374414bf4a1b0f93ae1ccf2a1d4875d82b25e05b84d29993212c8091b52eef1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:33Z), 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/FRX282366162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4a37d9c4a5633d6950e4cf2031bd78b1ac861c6f935d4877cdeec9bc0ec9c0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9Z62400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c062d7c0291f833d38bd4570dd9b42abc67d48f6a4f300cf55ca4584d1f0f1. 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/FR9Z62400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c9c394bbb09bb60321e5405f3e6fa01caefcb1edffc9ff866fc93b82a5ba7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9Z62400354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3659c84d84ca495208d534a85a83e87e028eb27e749f7cc4637dde17f5f3aa31. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9Z62400356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b327a84ba6163e673497123a46dfd42aa592c26bda66897053b7c8552510cf7. 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/FR9Z62400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e14c6d4b565f85d9efea25fc0a286792fe8da7737c1d0d1e5170f7e996e008. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9Z62400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde362760e621eeced2f43f058ad6b472651ce57c71b7dcfa00d98bb11d5f3d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9Z62400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240b4a50226ca086c0aedc96bb4eeb9cc9e335b937e2d6382f21abe8688bed2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR9Z62400362.