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 0x7293e64ceaa0a11fba0461fba588b86918c5ecbaefaa624b2bb861c77aaaa46e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/994990af-b0f9-4ff9-aac8-2a5e371e81cd.json and https://artists.proofprofile.net/proofs/artist/994990af-b0f9-4ff9-aac8-2a5e371e81cd.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 0xfe135bac9ef38c90b67a673ef3ca743f57bfd152033311f652cece9fee66bd07. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPA2436928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe135bac9ef38c90b67a673ef3ca743f57bfd152033311f652cece9fee66bd07. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:41Z), 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/TCJPA2436928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d1abc85e357651a925f4a3be3d7ac55c0b9f81b335c7f80e81a64533ad9a5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPC2492271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c0bb8b919041641eb166cd4c1504f0e68233c4c5be903e879eb3bb2a690c4. 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/TCJPD2546804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c0bb8b919041641eb166cd4c1504f0e68233c4c5be903e879eb3bb2a690c4. 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/TCJPD2546804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2833e654c86d936e2e7efb774fce020707ae90444efa1b349c9e212efe331928. 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/TCJPE2501134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d57ada3cf14d79eef4422368a42a6e5e3850d8a55695b93edfb01bd930045. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:20:39Z), 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/TCJPI2586460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d57ada3cf14d79eef4422368a42a6e5e3850d8a55695b93edfb01bd930045. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPI2586460.