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 0x53cc5df085845084164981885a29db14222645bac3295a26875d6c6db53c4336. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f90118ba-613d-4ed2-87ff-0ba4e2f994b7.json and https://artists.proofprofile.net/proofs/artist/f90118ba-613d-4ed2-87ff-0ba4e2f994b7.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 0xd5eba36f3591b3571732800a4a9d19d7cbffcf835e0c4c65e077c5f060527d42. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:03:06Z), 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/QZS652206175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eae29ac36de1b9a226e84cafe308e02c4aa7f368a9d91019a6290eef9370c2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZS662218354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904e31dd8e178df4f2f1fbc48505f1788c8f651623fe6d42da39e54626739111. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZKDK2208482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a7aecf59bf873f8db7169b641499a3b2d5313e0f77f4decd9a87cf39114946. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:05:03Z), 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/QM42K2271304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4b814941241bff927e9f627b6a1c90cb4d154d14819e89b8452d933169222. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMHK2215490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe453f7926c8f67a8bfcabcda34cddb5691ff22ec63e93614c79433fb99fca61f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:14Z), 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/QZMHL2207557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc325d51cdd2804da4b081105020cd038bc3fa8b1f6f6fc843e8c7e12fad96c00. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:24:21Z), 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/QZMHN2261105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b898dc2abd30da0cf5c612d03b08b11218670a4d1115e5ec9dc717556f532. 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/QZS672290313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7abdaf3981e66b8b75068cef61b45cbde93ea8c2c18d49062adb87d8a2c3e4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:03Z), 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/QZMHL2219417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4bd4b81bce227fb9a2f438a40839616f4cf178c3ff8d7254eb4f43154c3b12. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMHL2298717.