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 0xe151a9fb50d62d03c7cfe707d37a494863869f128aad942a21df8e7f957f3f36. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f641a2f5-e35c-49b0-b7e2-6efddd6fe71b.json and https://artists.proofprofile.net/proofs/artist/f641a2f5-e35c-49b0-b7e2-6efddd6fe71b.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 0xdaf8cb2b9a9e57236b13049effad6d00ff4bdde6b994699c904282add13991f7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:44Z), 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/QZHN82041146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e6049e8d157bc50add543aa71519a5e9dc34078687fa0321e35f1a453a4bef. 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/QZHN82041147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf092acc1ea6c3244839156e9926f19536ab8b7af51522e0dbfabc03343fb2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:59Z), 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/QZHN82041149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ccc7613157a6c183f121147d9a360655e90677208b933609caaf0a83a6fd59. 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/QZHN82041150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea11c176ba145b9ca2e4eee82488ecd208dce7d025e696073adde9cdbaa7f47. 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/QZHN82041151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f8b49725f5ede589a4463b5864695dec5f02040d013c198697cc80d88ce4de. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6K2143822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780e8cac26d4d781a3d0bc43308936e5d4a077e03f3d856354e98397895b921. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6K2143823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46138e26bf23e0a0651912d4ecb5cdce0b8f258cfce2e83e89ad45e9acd3c65. 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/QZZ7T2516674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf6d156b182c91ddcaab689316905ed5d633bbbb3057dbe69cc225bb2100c7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAW2461516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ab9c8a761ac8f5e787e0783e68328fe96374c09f4899052dbe222a8d4cb758. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTAW2461517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c217435792a78db9862a4c456da8606779bf67c20143c4abc34d1a23215cc76. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:17Z), 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/QZTAW2461523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d0ce7b0c018f4e784c5695c542c943e7c2e15ee7be842d64f678a0982abd97. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F22521725.