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 0x3e7ea2cbdafbadfe40b5c9065066fae981f7db8c7638b5714794f41cc3a2f7df. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/718740f1-a7b3-4cd8-a094-251c2a5fd11b.json and https://artists.proofprofile.net/proofs/artist/718740f1-a7b3-4cd8-a094-251c2a5fd11b.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 0x902f872477b18f0eb86bc8f3441f02b4212efe96322b3f3ff7ba59144bceea75. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR2X42336610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac2d5787f253df283353fac441a4e42120b20332103a868a5750bb12d10542f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA0M2335328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c26b774bf751c02cbb1624ae23a9e7c781e6c154382e4690f0474e5d470feea. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DGA0M2335329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f4a8a1f107680eb06aa6bd94014ed06e7c19fefdc40f0cf8e6833cee7cd91. 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/DGA0M2335330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd339d32069dfdca1354eb04808cb2c497ba384c625214e41992c82ad3493886a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:39Z), 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/DGA052323456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3d46ac041168e9fef66496aeb2e08b76a932afd9a34b6516bb24d306ff5d46. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA0M2335333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b15b46c279c731a97de2fc79740506c046af51b775acaf62c9e21ca83555d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA0M2335334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9cf2f59563d870572347b2002074e5f3f238bdd50d0f9e3bdfd3771fd728d. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR2X42336609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902f872477b18f0eb86bc8f3441f02b4212efe96322b3f3ff7ba59144bceea75. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/FR2X42336610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902f872477b18f0eb86bc8f3441f02b4212efe96322b3f3ff7ba59144bceea75. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR2X42336610.