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 0xd5e88bbb3cfa4f923483c59aef1d7f8febdbcfa99a5660e800197c368e36384e. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae529dc3-13e4-41b4-9668-46903f789e4c.json and https://artists.proofprofile.net/proofs/artist/ae529dc3-13e4-41b4-9668-46903f789e4c.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 0xc134184dcaaf1aa878155318febbe3b26b415f6d8a13b015e96584af922ce426. 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/NOUJW1701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ece30d3aaaa88ea40f21b9bf0210173d28582d75003216e619bdafaa556f33. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:18Z), 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/NOUJW1701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7477c6434ce7b178b7bb5d9328176cc1c8ec27c628e7f2bdfea918efe13d4f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/NOUJW1701005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363bafdc275724ce55e8a27c3bbc89a29ca823284308668ee970ae8b8ee6049b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:01Z), 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/NOUJW1701006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf245aef84f393b99e5c0ac5b98a989f29de8939e1d64d5d05f74a38b4e5d9b0d. 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/NOUJW1701007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eea2d2362b30987eab2344c78e8ccc5d9ee2e6a95267adea0f2326fb49cc4e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NOUJW1701008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d748ae8d9d1861ecaf43c8b51d63310c4eb16e96ad10a9d4b5a339fee297ad. 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/NOUJW1701009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe6ac22b077dd2ea61d7cada9256098d23360a588aa1f29a50892b15c94acc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOUJW1701010.