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 0xda31b0d0f3bb30dcc6c4547f7e1f6b00b018d2467e1a2449ced1a1302cd65f7b. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10a98e39-979d-48c3-b99e-fb154f3f2175.json and https://artists.proofprofile.net/proofs/artist/10a98e39-979d-48c3-b99e-fb154f3f2175.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kpm 1000 Series: Two People / Country Sketches and Antiquities
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 0x9ad8007a7a34d70fc7fdeda73ac47fd0558aae5d8877ac49a96036bc9fecac2c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:48:40Z), 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/UKN2C1900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d436fc30036a3df1181d2039cfb9632acfa07f5bedf76b088ca90c1d7a569f8. 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/UKN2C2102805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee118c29327935d19041658fdca4cab282ad9ab27f565d862f8485564f470d1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UKN2C2404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35acc88cba433696becdb3e7fb697f32e9b142982f67faae78a975ec97da4f54. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKN2C2404201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c04eb90ae5569978947a16b1f29acd1e21d51864b7b1f7e881a6bbdd4e8240. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:46:42Z), 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/UKN2C2404501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ea24029d3806639a3bdef93396f6f0584f4f3539b874c8e2bce0bff39d67dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKN2C2404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9331b68cdb52d978ee010f33ea647a1fab222ffe3120d092205402cddc341324. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKN2C2404801.