Jeff Pearce may refer to: Jeff Pearce (Canadian musician), bassist for the Canadian band Moist Jeff Pearce (American musician), ambient guitarist Jeff Pearce (historian) See also Jeff Pierce (dis
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 0xee3a1f684566c3d95a408dda1e45463d567c743fb168cf87bdfb54ac74a518d0. 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/5ebf6438-1726-40d7-b06f-5cc702064229.json and https://artists.proofprofile.net/proofs/artist/5ebf6438-1726-40d7-b06f-5cc702064229.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 0x72d13fe033ea6ca1668feae3dac41e2815961e59f228f5f002d9cbe263b14205. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USHM91336647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310edf42142602ab4584a7c5f2d09cb40b5554ce3a9cf36a81fed6750c2def68. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USHM91336650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bbf1615029639e3905216e05696af2814ee1113bc8dca0a936871a927ed13e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USHM80831132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f8c899e24b43b609a14bf0249c6f1d7dbe1f7413374e61d69b5d735242ad9a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM80831135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d1e48bf1d1f77bda2e8e596cd583bfc9ba8c78c73a95779d0413b8f1fd269. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM80831136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6df4ae2383dca0dadce1bc359245e13a71c7e2dd792bbb24b3470be8cea03d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM80831140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cebd3b8f2698f8d452cace2efb94f96f4707c28ba38b500982d51d3297915c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QMML51200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b49d287f003314d9a39cfadf1fce4989e37faa6f9f91c7695bd1909a049d908. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMML51400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac6602f38eafc84940d0c74d798512bafd662f368303dc03cc63a66f14c21a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QMML52030001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f1613d7dea4cca9ee99c18f3fd5a1618fbb62dca88cddc0a7bc557f6a8a87. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMML52030002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a04e59a0a792970dcd942e35b4b33394f75116cb29e2263947f9f04b75f09bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMML52030003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1d06525e81d4d30b818fd1a93b7032acfc51bbb38c04527df190107661adb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USY282307213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e12f03d21b02b8b6e1fe0068f3b77fadd6ab758d61cdfcdfbc9551615aba6. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USHM92434576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7b47200e55104a428a8e52b29c4f9c5f41f43218f18c1438c635127cc7c61d. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USHM92434578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f297c14c70e3b4edb74ee248b7e9a97eec25c11b7425c4bd481d9703420168. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USDY42537486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3640a6c49acd606da1310c813fd0ab22d38fa15be8d820cdf1cbe62456ebb. 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/USDY42537487.