RFB or RfB may refer to: Radio Free Brooklyn, a community freeform Internet radio station in Brooklyn, NY Redox Flow battery, a kind of battery that uses a liquid electrolyte that flows through tan
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 0x41383194c9907f4072ef3f396026bd8b3474da0b33c1cf74176debfac274c278. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b309dd19-7794-4d2f-b8cd-fe0e913bdb37.json and https://artists.proofprofile.net/proofs/artist/b309dd19-7794-4d2f-b8cd-fe0e913bdb37.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 0x37901833d13004dd67e272d06e01cab627c511f85b5df1c7bd94f4f0cca53c31. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHNB2351060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073d5fd6b31dba111fb5a3f074a0dc2c3b1f89045855ca8f1be2f2d15df002d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTBF2367895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8a272e72bef295f277cc254e5365122de59da7869852f4b50ce36cf609fc6c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFYX2449631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16bbdd7de295c500364ae374d8feac6c66414aad4cf764f5d7cdab2de051288. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFYX2449632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8c63c0417f9f86a97fe0075bea5585f9148ebfecae86579d59f4daecf7ded. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZFYX2449633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54e79cc366b0258bcc94e5bce4f6b02e7504448a36a9934e05dc85c26907164. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYX2449635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e40c071fe002dddef99745819fac43cc90cab27c3079754c4080ef1d10833. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZFYX2449638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8605edd38ceb463906d6f2146785cff481f9f5372662e5fc21852580b2a09633. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZFYX2449639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b7e09fb7b0a2e7dde64b44462ae9b19a7ad6602be3fe607c3831f3e3e2aa74. 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/QZFYX2449640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748843b8eff0202e42327f504f7c582520eb7f92d3e3558b8eb990a581139213. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYY2408314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d3c8267b6c01ac7a9f15ebba3ddaa5adda36da953ce983e8b127de5babb74e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFR2315172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f398eea9da817cbbc3520e154f5df4c303945c4b753442abf07de421c6e21c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42287464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508f10439cf0e7b18f934d749b3d7d7f6ead6defcd8ce090cae30dee0210270. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWX2135877.