RC, R/C, Rc, or rc may refer to: Science and technology Computing rc, the default Command line interface in Version 10 Unix and Plan 9 from Bell Labs .rc (for "run commands"), a filename extension
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 0xf4b8c7ebdc732223a44c0b6add50c43712c4eccb182ad58fad8a797aabb8b60c. 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/69fcc5a4-74ac-4eb5-82a4-e64a886f77e1.json and https://artists.proofprofile.net/proofs/artist/69fcc5a4-74ac-4eb5-82a4-e64a886f77e1.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 0x7bd3bff0793b526330d46a6cde76ba20187737d3c81a91b82bae4abb64750694. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307be2f44dea3ab5c01551a7f6ba9d65b7e21517be4c710f1e3d6cede1c55fce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3300dfc7d7609a9fcaf6895ca88ba2d8bf67125e354cd312b7df556fa8e5c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87d401a90d7e097dba8448448f5c6f468a0bebe3d696b48739dd63f28cd060. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd3bff0793b526330d46a6cde76ba20187737d3c81a91b82bae4abb64750694. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307be2f44dea3ab5c01551a7f6ba9d65b7e21517be4c710f1e3d6cede1c55fce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3300dfc7d7609a9fcaf6895ca88ba2d8bf67125e354cd312b7df556fa8e5c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLA552400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25d4238077267e0d7d0969ccd50c37ecd008e9a69ab90127b721562048f18e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552401074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc894592aa45e4196b1123fe93ed7b7eb4d098d743575f85c89604940a967c584. 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/PLC062408531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf593a795d064a88b7dde1f658dad502a6652b92032f3b7f5874db8047e1ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC062438432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066e667469d22f47417443f9d4823a745026a4df761e8fc517f41de54570a5e. 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/PLC062438438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e929dac4c14830f902503eea9fbb3dddf0ecbef9733ba715d971fdf466ac7f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC062438442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6d82a31a51776e4759c0ee580a79e6ac48a1273377718fa6a1b9a464065cc5. 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/PLC062438428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d9cfe6381573b65e81f9d4acd35f1524b5a106ce21cb3a73353b136d1ca936. 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/PLC062438443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbff861ea7df5225c4a4c7eed8cdf05cabf850cb43a787aa727a44a1254337b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLC062438444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4ee0e4ee17cb3c5582f55f658af7133c20bbd779b908efc95a99db47c6904e. 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/PLC062438429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a546a1c969c9d5e8622300284faa40d0c254e72cda46e08ede767d4ef282e. 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/PLC062438435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf593a795d064a88b7dde1f658dad502a6652b92032f3b7f5874db8047e1ef. 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/PLC062438432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066e667469d22f47417443f9d4823a745026a4df761e8fc517f41de54570a5e. 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/PLC062438438.