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 0xcf004edcf6244c760c7f5d6e722270d6f459e6a5deea9b7ee8c02346ffeb2847. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82fb1f60-d5c0-4f9b-969e-128303578e8c.json and https://artists.proofprofile.net/proofs/artist/82fb1f60-d5c0-4f9b-969e-128303578e8c.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 0x9a5a0f7ae714e073d6e0ba71762de7dbfb7afb38ca9f58b417c010059a4d94c8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6Q2087475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6179b53dbdc360e48d9acf57684188c88141fa07d720c1cc01aeabe87ad84. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2087476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4955899d2948a0b70ac717476a8a160e98303d1c6d860cdbf8d98fcc24af1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2087477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884a96ecaacd71d6c4eeb772bf723047bfdd43fd0931bf935d587af1a824038. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2087478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a550635eabdc7c5451f3f71ca4b8fbcf3d06c9e90e4165fe1ef95aef4378be8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2087479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff39d9d6da30b7db2aaae938cc5f9a67bdd3cb48a904cb64d88d26de21be869c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q2087480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb53f58e0361239da9674a4c97f6e30b29da21217d169cfb540a20570f5c2f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2087481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aaa98d138f15104a4027fe76922b41140e2cc9ce07169cc93bf6579b42cf17. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:03:23Z), 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/QZK6Q2087482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ada4d6e6034972f6c667eccdb8076f7e78c3701b5799bb3e119da37d8e696. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6Q2087483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8e8ac609b6ff9355fcd6cc6b7b5033b5790465b563b415624942c52d4ce365. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6Q2087484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de07803dbd6a02dd83186cbefb90bf0fb55bce013833f4bf67e2cbd3336ee98. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2087485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d28c3fb6fe5b63001e56d62500a19b7802f1c4f8303398fd91733996cd63a35. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKVL0910090.