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 0x1482520d8947f38bff6ed28c4067b39bf10e040b731d58dbbc7c7871f77ad55c. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b10b702-37a7-4c44-9a19-261a322b6ea4.json and https://artists.proofprofile.net/proofs/artist/8b10b702-37a7-4c44-9a19-261a322b6ea4.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 0x0b0dd7b081c6e292995403c987c612c8ba49a57ddf7e580af26dcf48da24ca76. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PL50G2205050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66aac83eb19f76013fac4032d8881d1a2a7af1fd4866cc7cedf3a538f32bd47. 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/PL50G2205623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33ba2285af75b85953bc3cb152ec2b408ab83ee5a7e930b7a67d74b8bd4acf. 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/PL50G2307603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf504867fadcf060f6407d5725a1e911036bdd2db2b256c9ef78ee25c21ce0ab. 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/PL50G2307604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf089f7d81318ed5102c57bc4055604bbc0446c81f3793e53397e092975fbf938. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:23Z), 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/PL50G2307606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c367bf7402e271cf3dd2aa6cf53f61f929dc338085e168d5da10f79c738e96. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/PL50G2307607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181c602d69ae171658cf8cd268ff23980edbd7aefb7a777d8260c2ccec963cdf. 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/PL50G2307608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb688fa8205d253237c9b4b72458dfdc2aab6b9b5805220af2ff0469c142a263e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:35:24Z), 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/PL50G2307609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae9f98cb67b04cf894bd59cf8be2b3786f0ae7e25de041426812138ee1c8b27. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PL50G2307610.