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 0xf7e55620b001c4d00c8bd9c29a61da466dce67cb38bac43e61d237b222715654. 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/8f28181f-7d38-459f-9be8-e28af1cccfc7.json and https://artists.proofprofile.net/proofs/artist/8f28181f-7d38-459f-9be8-e28af1cccfc7.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 0x6b1d70ee867955d9ebf5555e9d703562291d70524d75576046d57174b0113e66. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SKK541700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87127e748ba1da2c4bab948215b9ce0889d4b09be588027606c47bef4a061db0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SKK541700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd971a275cd78fc45046e09eb2ff1f1ccefbd0ff14a2ccf09ae99823fe22cf70b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKK541700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43b50a9aa9d79e5145dde6e4ad34bfcda89191d7c3d0e8ddfbf53dfe8edd7e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SKK541700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b2e42905ed0d9e209368f02de76842ae59846c14462604abe4af744f5928c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SKK541700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bfb7815eb01613735c7f707bdbc94d92eccfd60417f88e324f1f01edd1044a. 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/SKK541700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8002dd82a6fe2f6f819dcca9a239b687c3739185fd30df0782bf62ce7a482c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SKK541700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb454c268baf6c7492b541308a586f2fd067ab519abe523eb189d9e3148e60ab1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SKK541800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dd7f03af645f2a8d3ef2441edf1244eb88f42b3486cefebd3e62f63b77c59e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USL4R2050126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfe9fa51152c0c3217f06d29c2e26f34f15ac441cffc3004f8f5b0304c60d8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:17Z), 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/USMH92357132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064fa9d441549971effd402a3a760677fa3deac637cc4d02bb4a889bb2244e40. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:23:30Z), 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/USCGJ2414888.