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 0xc54df4a77b3dc935ee64c1c7f616ea03d6d6df2f09f4a1565fd4d4920e3c58a8. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f4f30e-3f34-40c2-a389-c1844053c7ab.json and https://artists.proofprofile.net/proofs/artist/a7f4f30e-3f34-40c2-a389-c1844053c7ab.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 0xe5b794b9f0d72486c5b2d6b70838886ebc9c8b8a9818e1c474b84858f3893dec. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:37:59Z), 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/QZK6H2568835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a8d46c56eb91e596656fa53ec5929bbdfc455e6788e0f7a0ce70fb6fd85c65. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6H2568866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc3b4d8ba533a68f34e13ceeb5adef637cf8f15e476f1671f8af75dd76f868. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6H2568878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859baef16647d6e2257f5cb7c552f54f40fc3f1d863425e28b1bcee8f89c06c3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZK6H2568859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f9fa1f5b3f6eb6b2c997986b9c66fd445d531147e51362d89e7418b93e334. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2568843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc05fa45a3b4da2838162156a564ebacfef53616426c5c9dd0bd1404ac0749e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6H2568883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc40ed149e281eb31ee26c4c5e06045efe0a78053d9950190b392e05bb6b3a1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6H2568873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476bab7f421920b7c19ea755f4efcb4b283442ac13536e5f0dce36b7f557a67c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZK6H2568825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af283a4e28edd4120fc0e996d5f459d7d760b066e20fcb5e21a55a418769687. 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/QZK6H2568861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992c5e3b79a047e92fb1ff3d161fe545143379ccc9bc297cbb0ad86ebc2cbd1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:49Z), 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/QZK6H2568860.