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 0xfed9e4f976370ca8fce96790466917ffd4ea29f9c77cd00353fbb454bd64809a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/719e4647-7034-42ed-afaf-6d79cca8af09.json and https://artists.proofprofile.net/proofs/artist/719e4647-7034-42ed-afaf-6d79cca8af09.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 0x42496b6d7bf32a7ff8a95f86ae1f10174a7c535b8d241ae89b3bffd45f1f9182. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:01Z), 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/TCAIW2424786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797537fe8947a13758c2ba76d629b4ad1ea85ab5c9c367eb84b69db5483a51a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:48Z), 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/TCAIW2463642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75c9bead85f9f478920fc45c2284d681199205de64b0be1f5326216c3023f41. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAIW2442796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf155ca6d19d43155fc98c0c72b174764088f1f2d0271fca04f3efecf20c92e31. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIX2451701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d021c2246cabf74324c8ec3874a3923a788152b5b377ff723c0b31f916f73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJH2522766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defd5c251093a54e7bd4ec3d1b365f4e8dd493f3711573fb919fbe45edc3680. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJH2518188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e443d26561f2d4494d334412afd9e30de466327cea24114331401a7dbac827. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:27:17Z), 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/TCAJI2553807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8fd625c1aac2cf08cf2e00c1626efba7ef0af2f36083c316f64fdac5a0bdc1. 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/TCAJJ2585256.