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 0x9ad733b6cc28974bcffd733698902c36ee5c89d82b31770b4595e10e1d1d096f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a948860-3437-4ba7-9340-c8d443159d43.json and https://artists.proofprofile.net/proofs/artist/8a948860-3437-4ba7-9340-c8d443159d43.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 0x08fe87dbf0d3ed0e1bd81c42ea96d1f6f62d8fee7fdb666283e4239bca96457f. 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/PL17D2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf92028a02aeb76ecda7b6eba79871aee5e43192b80b4d0317daa7b5e4c60d9. 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/PL17D2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106523dc46681cbe7da101c8cdcd22d223e9fc5a925a84963aa274231c77e167. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:26:23Z), 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/PL17D2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aa1094dfc1d7a157888701f12e15b3dba2a4d539bbdfd2f908164b23e09d35. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PL17D2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a086639160093615f37701723a8acd32aca17125fe920bff2d5f62d6d3896. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PL17D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491a086639160093615f37701723a8acd32aca17125fe920bff2d5f62d6d3896. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:46Z), 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/PL17D2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d1c3dee7342d87375a6ab5ec6844ffbaa2cdc10520619fabd138eb151f3b1. 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/PL17D2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1556d30d8a15f092512b66ea101f9b6d585d2235de58566fe6d65f48628fc03a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PL17D2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53bb17f34b16d2e9c20376335d4b7222a4cdf32103a6f30f3e7116b5937a19f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PL17D2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf84362256a8e81a548abdfb5bd8f9f75a502b7e016200fad712dc48d484e4f. 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/PL17D2500008.