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 0x43770a7229c809cc6fee99dcc5e7d3deb9d8b6654d9740f26fc07c1bd9df1572. 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/af3e7d20-60a1-4de9-9869-6df4c0ff2401.json and https://artists.proofprofile.net/proofs/artist/af3e7d20-60a1-4de9-9869-6df4c0ff2401.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e735ea96a390d503c896cabc53959ccd47971c7f75b256631b5925784cab29. 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/TCJPX2319100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a71e6707799b0ee278b119bd0f315b00e99ac65e2d3c60daa0e5fd85929118. 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/TCJPX2319102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f18a49d0c016fa849476dc9436f6eaad09e71aa0650c131244eba86b8647803. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPX2319168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dc147c155fa1385fec0607e5f9fdc85d20db6cadd8e69afd4a9bc58aed561. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPZ2436571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dc147c155fa1385fec0607e5f9fdc85d20db6cadd8e69afd4a9bc58aed561. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPZ2436571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2eef6540be036813032b635e9c193da074a464c87ba3f06e645434ba5aec32. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:32:43Z), 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/TCJPZ2470124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689746e7672e360b0db39896b8b2ffeff5d36631e4dbaf1e97667707628c6f49. 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/TCJPB2406620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc48e90fa04b8393a7bdabfaeb2817130f8c3546405a22380dfd1fb6eb8efb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPB2406658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562cdc55606ab5224aba972adb844c881150ce1cc39dc4a72e6a8d79312c340. 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/JPS801951038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a126ef3ed06abcd687a79d956413cb0a8bef38de3c86790de2879adcd3d1e9. 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/JP92J2401485.