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 0xe059e5e0b9102e4ebc2cedcff8e96ed44d1a1d765e698db69caa6244a8e5c9f0. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc001cd8-ec1b-478c-80ce-01eb47d15a04.json and https://artists.proofprofile.net/proofs/artist/dc001cd8-ec1b-478c-80ce-01eb47d15a04.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 0x28ab4452fbdf4a64c4ebde49d2ff6441a82b0bd4c5a3ad948421449b7d28d7d8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6H2550743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996dee7710b670dc54f5d348378c2e46cdfac2a97b03ca197fe8eeb2709bae1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2550744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc82642b56cd6971a3f4fce9e205927633fe1ddc086ef5d6a184af498641b5b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:26:49Z), 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/QZK6H2550745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e5420bb0fa34da80ec2ed3c7b1dff08163cfe2bfac4d7e95ff6754bc78fd1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6H2550746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde9904edfbe1ffda97f5c346daa20fcb5b9a487e914bf6061316549d6e6af5b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6H2550747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8e6cdf4d7d449453e6b0ababffe9e3eef0a83cd787a4d871a198715f8520f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6H2550748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5c7ead6a641c374decf43fccfce0884b0f2d61342b2456573b5285cf5ce908. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZK6H2550749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc427e5a95daa5d0ac88d9f275ae2712a9e7dd1aeeea2c807f3d30705f5f8fc. 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/QZK6H2550750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb0cd2cc27a295029032901822a5d21a7ed94f63367aa8c687bf2c40f458081. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:21:40Z), 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/QZK6H2550751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67342ed4a7a641565cb97e0c77921f3d9d410a6afd92f10884aaae855ec903e5. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZK6H2550752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab15290de3c2bb8f7737f36233a09204b500d63396df8070d246b8db6b04986d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2550753.