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 0x79bb2449751e1039713de3592b82955a7990fba81768f12f170b5e4d1afec784. 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/21758193-4f59-42da-8abc-319621b9c75c.json and https://artists.proofprofile.net/proofs/artist/21758193-4f59-42da-8abc-319621b9c75c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kpm 1000 Series: England - Town and Country
Kpm 1000 Series: The Editor's Companion 2
Kpm 1000 Series: The Editor's Companion - Volume Four
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 0x1913b95bd1b148a077f7820d7fa773a31c703210759819014d13ce64a9a38bd4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBBGL8401350.
Kpm 1000 Series: The Editor's Companion - Volume Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3719d8422bbc7123605e3802fe8c5ee832815fc29e54772cf39dd9111a786210. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBBGL8400839.
Kpm 1000 Series: The Editor's Companion 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd53c778adec80ba05d014e141074696f892e15c71724c1a14b52b50a0fa77. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBBGL8401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25895763583d6d7f5f2a08642c966d773e168e8b5a737c963a22cfab0314fc46. 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/GBBGL8401062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e7084979c2a5212ced7784eaaae00dd47510bee8cc3a93e3c9e7c41e9cda5. 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/GBBGL8500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07360b440c0a5927cc5f04e0a79e4b5befd737702d903a0436b402ddbe5ff89a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBBGL9600484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f878afc608fe0948c259d2502bb84947c6bda7a54db89f7a4db0496b406bbf8. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/GBBGL9600498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4b09af661a5c93fc8db6771bf96568c41cead4c7d34da9dba1502712e079bd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GBBGL9600504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3198dd622c4c41edcba95a45f04e1fe91325c8ba51e562898545166715c30. 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/GBBGL0100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb980ccf58f3916e72f8c42f5fdd2d9964a56cd61164122657e682bb5a18f09c5. 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/GBBGL0200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc801deca9f94cc15810c9f8eea60f961bd7d6a8778b296f559dc181f2b6e157. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBBGL0200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c66ed9c0d7898f17938675d441157415f2a4b773ff9aafa80774f9988bf417. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBBGL0200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c654f6481120330ec8ba9cac59de6a5ebff1a5e312edac63f692fc5fe831c16. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBBGL0200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f00b5c52a4be253172025bd729456757eb8af111a768f6eaf8471124aeaf06. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB78E1313916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125238ea998f54d1254e1dba135fdb35619f040c790d317e8fbf43bf175cf90. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GB78E1313929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03054666c07d11db88cf2591c51851fe756acd7b19b7287679b3cb3278573d7. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/GB6U51708118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c41726db7c0610554de2eb2be14a14759a1a1e5769a16190bf4d8ad26569d8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GB6U51786007.