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 0x8ce18592bc2454299a5ab77dd09cbff94fede9c69c079b9efad019160a8f92ff. 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/1f7463dc-7f51-4524-be94-a9c6d21d8125.json and https://artists.proofprofile.net/proofs/artist/1f7463dc-7f51-4524-be94-a9c6d21d8125.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 0xd326cd8e3e7b9e76538ab541320d65176db586040d0de4b0c0e6088b1a08884d. 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/GBLFP2460821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73f28db125453914c7411582d62503c80291e9ca5c4ef0a927356893c1479d8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:48:02Z), 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/DEY472278882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71627d9a952c4d36806cc1a0e7f3586f37e7770158d93b99e99984d1be4e5d. 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/GX3Q92344944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8768915df75c34842241714ff49ebe37b1c002e5d3204c5527c082eaad545e95. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:07Z), 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/GX3Q92344952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4211ac4dfe42f8520ce4ea87e0620827c00d40093bf15ceea48523dadfe4dbc3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBLFP2375129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3285d107389dc784106cce69c532f925aac2b9774447004e729d5aef0acb9c. 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/UKXN22314393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a30db54f50ea41b392b3d6e495227282a7d83bf7c8bdb79d4f3f92d0be455e9. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GBLFP2428268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc09916a511191f8d89cb36a484814578f4c268a4a5419795e0014e5e2b96d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKXN22451774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7611a1d72758465d02bce040c52b2cb15b5d5a40592132aeb18009fd8de82e4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX53U2529737.