MRB could refer to: Eastern WV Regional Airport, Martinsburg, West Virginia, United States; IATA airport code Maidenhead Railway Bridge Malaysian Rubber Board Manorbier railway station, Wales; Na
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 0x7310c0d208e3f13a53dd88b1850a5da7426e0a16cff6df7437d6c735bd59dc80. 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/fe71c6c0-136a-4311-88f7-e6d13de2ce55.json and https://artists.proofprofile.net/proofs/artist/fe71c6c0-136a-4311-88f7-e6d13de2ce55.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 0x183b629b4750c4f678fe87810f2cbba2fd75f0bc39555611547962fa60d84a04. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2389991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d15083a32d5f5f7f5fc2305a7952811272354f6006bb2fefdd779a7450d0f6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5AB2471458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643237890f60d8b4c6357543ec675e10e7ca75aec5f8448fd84d37459897b0bd. 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/QZW9K2447683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88f8c3dc56dd205c76867f4cb62e12ae3641e89d06045440d7f6096d057c0ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2447684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a087f5ab34150ff278e94a6b3c4619fde2fe3a537cc148a3f6b6e154772e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2447685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d15083a32d5f5f7f5fc2305a7952811272354f6006bb2fefdd779a7450d0f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2471458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2440a264731676d4854b6e6268827074fe1435c7fb0eb84c061fef7a84c57f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2447686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67236d048905ce013a686b1dc0c96172f29373c7b38b0f3a9ce83bcc5e567b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2447687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2063a17526e55354d2969f4ec05a7b5dac7df2291f3ec8ec328bd36943c7e3. 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/QZW9K2447688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea47511206f2e79df8a7775492329bcb2e81a41149b091ad37724f5309107bf. 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/QZW9K2447689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa128f38d757019dbc86bd11237f1b14306a402269d702513495a19ff50178dfb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMZ92550321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b31c3bd309c1422dc6ebae29a78caceab269316756cb86e09d168822a86d6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BK1782547684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd976f663569a9ffba7e18efd0ca5aec90518411cb51ab81d648f30739ee69d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BK1782547685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccf8eba9000acdeaff723e2676cb530d5ec24a82b8224b24b117cb545890a6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK1782547686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb532f0fc72349c8a1d28660067577a51b615467b99a01a9b303e47a7b75857e6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK1782547691.