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 0xecb446faf53cac3abc0d114b7391015649b7cd9b4e9bbc2a93d93045da1133b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3af1985-4027-4826-b489-56b2de2a45d4.json and https://artists.proofprofile.net/proofs/artist/a3af1985-4027-4826-b489-56b2de2a45d4.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 0x3f023ee0963081ab6501489ce07f11c18e3bf1e8b2739ba9e41660b29cf94719. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:24Z), 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/QZHZ42064655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b55be6954ba3c2fda501c85526162a9a592c8640c120b4a39cab796c427a69. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHZ62064769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4f654ab1c513b56406b4db13734fa5106aa6d07a88d23229945e9790765cd0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:41:17Z), 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/QZNJV2050649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af4dadd160ffc297e09c885bade97901cb97bf72fe67490f3d5c70c88c0a83. 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/QZPLR2075591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52df6ac87d3f62e04adf15154d2de6734726ee714300fdeff3e4a185d4b202. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZS652145433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca5f190138be9a154874e79e1bd21347a26f9c937b20beed898d4870e107167. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZKDK2235607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5668fa593c03012432c38b3d4dd7598859e76124edbb51704c69be47c485c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:48Z), 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/AEA2Z2337828.