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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb2449751e1039713de3592b82955a7990fba81768f12f170b5e4d1afec784. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). 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
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
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.
Kpm 1000 Series: The Editor's Companion 2
Kpm 1000 Series: The Editor's Companion - Volume Four
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1913b95bd1b148a077f7820d7fa773a31c703210759819014d13ce64a9a38bd4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:53Z), 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
Kpm 1000 Series: The Editor's Companion 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e7084979c2a5212ced7784eaaae00dd47510bee8cc3a93e3c9e7c41e9cda5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBBGL8500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07360b440c0a5927cc5f04e0a79e4b5befd737702d903a0436b402ddbe5ff89a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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 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 0xfc801deca9f94cc15810c9f8eea60f961bd7d6a8778b296f559dc181f2b6e157. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:15Z), 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/GBBGL0200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb980ccf58f3916e72f8c42f5fdd2d9964a56cd61164122657e682bb5a18f09c5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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 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 0x25c41726db7c0610554de2eb2be14a14759a1a1e5769a16190bf4d8ad26569d8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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.