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 0xc00c8bd50d65010d39e8abcbfa1eaf5cd92f7961a3cd89aee732c057c4c695bf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63370c9f-40e3-4e03-89f3-a035893f91b0.json and https://artists.proofprofile.net/proofs/artist/63370c9f-40e3-4e03-89f3-a035893f91b0.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 0x85b68459d22c815081fc76e5294a0113073ede88fd8947e970fe230b37cc8dd0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRA220907091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66d7157b9b6abd841e7247c9e9f75bfbaea61076bf88eff98945334ef800ff7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRA220907094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de35ed23d25960af0726d78ed20e9e7e45f9d8ffb9b8b681811cfbd84996106. 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/BRA220907095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bae1126b3720874e93bcc20e4c11e48db9e9f0d1ed09db5d2491b4a387a030. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRA220907099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486287f614342faa8c704485fec783eda9d5807f77a47c248872c6a8527bf95. 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/BR90Z1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902fed99aa480d9a6e0542b907b7fd9ae4d5e2ed879ff0be988f81d76b5fe235. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BR90Z1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2752714cb67b26712a7ea7a3d7e9c6aac72230a84dd057da8bbf8c2350d4f1a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BR90Z1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d3f4f158e075adc542299b53065c2c5f52ef3c94d4300075a1432d76c7492d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BR5MK1300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2d9dcc8c7604c2cf93c60f44f2f13a995944ac5eed595c5348af8677b5a6a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:20:06Z), 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/BR5MK1300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eaade4e56e3b82cf4293406a5e7dd1e95b66f6acdce26a3adf287e4cf22258. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZHZ41943344.