John Pearce may refer to: John Jamison Pearce (1826–1912), U.S. Representative from Pennsylvania John Bond Pearce (1843–1903), architect in Norwich, England John Pearce (tennis) (1923–1992), Austr
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 0x60562af20beff35dfaed56450e888888e9ed1f831d8655d091779cdc655ec289. 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/d717b11d-8104-438e-b1e0-7f5b6f44708a.json and https://artists.proofprofile.net/proofs/artist/d717b11d-8104-438e-b1e0-7f5b6f44708a.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 0x8e3656efadf27e4a1eb3760632650fa3b0ac4754eee6cf2c9aca3d35bec43d5f. 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/GBCWU0601688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b511f9f71dabb9ed2a15f649713ad0ea546298a052d1fa782fd20973d3758. 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/GBCWU0601691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdfd27d60087195a9dd13989651eb7d51da29821a5e24a3a5ab9b367786b10a. 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/GBCWU0601692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c579d072b196e7128fd132b03cff713c6f71b2c479f579dcd0ac41579ea9b1f. 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/GBCWU0601693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adea869b02efa66468410596862a9e9a45ac3b6e26833348e5c051bc9466fad. 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/GBCWU0601698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c5eb5bf653eedfed4bec161b7ae1f74146455e7f1441246d88c463f3e117e. 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/GBCWU0601057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cff2303979df7c86241c8d2d1ea28b63d15d771be4136fce6913bd4723dffb. 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/GBCWU0601058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7deb9b9f084d8e50da992cc116c7866fe19ba5c656962233554326c2f69dca3. 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/GBCWU0601059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fdf37eaa6271e152cd0183a096a2b195dc444f2209c1c5eb2da27558834ea2. 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/GBCWU0601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8d3d055b04f9a7e7a7c2d56c4db3a82870c0ccedaab80a23bc8ad485844d7a. 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/GBCWU0601061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6260c42e89d84bd7d41c8a8e6b5f5d79d86145ac4719b1fe452c160524f7a9. 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/GBCWU0601062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cced37b0b7ba22b278eb6a9c885180576a929ab41ddf558d35846b70dd563c. 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/GBCWU0601063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e21e365f5559879b0bba853c44e653b102fc83b8bf2565b1e81ec19c1b380. 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/GBCWU0601064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f8e3ee8ab52973257ac84ec56b7015d908351306127796e131150a0d68166c. 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/GBCWU0601065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037ebba095d7441c0b9bc4168c189d55e3c31541ae8410237ffd5b90594a260. 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/GBCWU0601066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5105e9b516a3e77d1c927cc1caa5e9dbd608824cf7b12e21280264e75abf9e1d. 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/GBCWU0601067.