Haddon may refer to: Places Haddon, Victoria, Australia, a township Haddon, Cambridgeshire, England, a village and civil parish Haddon Hill, Somerset, England, a ridge Haddon, Gauteng, South Africa
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 0x739055507db85312c38c22b2c1b1311a5142764fb56b7a6fdcc17468e9e93ed0. 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/523a73fd-6349-4bcc-940e-05450ec063cf.json and https://artists.proofprofile.net/proofs/artist/523a73fd-6349-4bcc-940e-05450ec063cf.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 0x666806a8113bd9973ce51dc2ef14153f0e368ee2fd4d3d30bdba41a81c3cc362. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZ8LD1997100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377b40e2514d5569901fc05914e921be866a1e1cc324f9d8a127872aa12be492. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB1972877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bac6d17995b59a75e663e1418ce40c1d3fcd107730975efb2411bf75c86f4f. 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/QZHNB1972879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf902134880d7ee7e20c8c212419506ed29b92a39614e1c8de36c074b39a0fa5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAU2226063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85cc4fa43f2dc0a10d70bf223e9acd106150d626a8ae31cee3019495737b4ac. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHNC2341944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff10646f3c51a6f48365b84d6739e1da9c07558461e5056db58bfaeee7766a. 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/QZNWQ2373054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33cda8f06c957755d20a83d03ab13c77224acc61ada08a8e0e6d247814482e3. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTBC2324680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444d314a748dbb6484f646625cd2bec2b4469df4816ffac76bcd0b144f2f635. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWY2381547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49b41b125eeb4ee9d76160fd7d0d265c68b585cc7cab1dabbcb326a3a050189. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBC2324681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e21bfdf9329a2b252815fb266aa84292580750e064cf598d61cdc9f692abd2. 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/QZTB62302770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b89fb178c541a409a8e6367e5b331b3904f4ab2967e8ee239251f7534a1a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBC2324682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bd649396d3ab9c880cdeda77d4a9387a483df1e7cf04a9f79d43b576ea022. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTBC2324684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09066c6398d7ca3ecf62d095d78a9c1b53337ef84c54cb6e16006ae90a8d57. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYX2496150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aff089c5ace994b4a572ec0b66d8255be02b3c1e3e0b9bd4ffb6c7cacf7698. 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/QZFZ42400796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e8e6d019ab2d9d50f34a4a1d073d40976d2e26bc6a511d79323da8281ac01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8556b0a6cec1d56a7d3bddb4877644be7b4a0da384282a91086ebc1a9d220d2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZES92425372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06174f15daae43641c58663563805fd14437fdfda048d48f1ef2eca508f0f8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN72485804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3418ac6f9ff9e0dd9043ab6ea733a171bf5bc7491d72ef49fe68bbd851e657. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZK6P2419417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5267ef9cb0fe263370848529e95bd1a5d3dbb9ff82a97086fcf7b57c3a79f. 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/QZK6K2448030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285469c0c8871a7a23c799f1e178db1303411cfa3e1cbab390e47390080c9f5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6F2464235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd259bc6e0a7e7a3f1b1278455d59364fe1dbb416bfb69f6fda5234db013dbb4. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZTAZ2471989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a4e86390033684ca757e46dd5e35f1dbf73354433f82c1a05534e323719960. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZWFW2452786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b01ab3c12670a4fefecf23b17f005ef36405ad5c1db0b36d7be59ea6f073d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2534856.