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 0x7847f400268ccbad3fd94d8c25f49b16b9482a44d9e3529a4502d4a0121b5bcd. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8918ed18-8243-4e20-a64d-9b2ff09122b6.json and https://artists.proofprofile.net/proofs/artist/8918ed18-8243-4e20-a64d-9b2ff09122b6.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 0xa91ebd99e37f291eb21cbc70ed700d94f177983996bf50b13bea4c2b9687a48c. 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/QZHN32383919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74727efbaca6258e7e5fbc54a09c23b0eea949f739bbf6e9b2a2c00570a8ac3. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZTB42384940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a7ebb60099714863fdfd0cabbdad5da60f16cf10be7f1b5f090ad1abaa7017. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAR072322111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4202b927741463a77d8a497fabc8733ec0b7e76d390e0ec49ea58d308c4e4931. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/CAR072400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cc1221883953698b30ca3cae708826c72bae58e9ba18feea5ef41fd3cd88fd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6F2443008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879027d77398c10d3744a2b2cbbe5d402ed555611be2e634ec25270d3a0b0267. 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/QZNWT2402006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba83dff63b6220c8cca9b403de369ac72e3e4035552a18bde1989b7be37fa55. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAW2457638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45357e73eeb58d87f69205ec000fbf10f9d58c5d898ddc48a572a46b29d8f055. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:06Z), 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/QZWFQ2438846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a62d3a7560c6fec9f6fd321131574eca3b70fa074d693e46ac564c14582dd1f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ782483864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981bcd6659ad4d6d6aa5bce76bb15018850d83683055fae3f0adeccc5cf5379. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:39:10Z), 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/QZZ7V2473226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d18c95a9a7c04fdf29ad7aaf18ea79dd5dcd080b38f1b2bf4fdbeb2de00ff. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/QZES72513247.