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 0x4502c2a3a4b82d4d420afed654b6d11139469e7120a1eaa90a7a9beb8d0fa39f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36a5959c-166d-40e0-a48b-e8798526ad61.json and https://artists.proofprofile.net/proofs/artist/36a5959c-166d-40e0-a48b-e8798526ad61.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 0x1a7f67ce6fc863b7f92046ad8be1ab6574610740c1b0402afbc137fd2f57f880. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZES91879233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fa8c3a512d1ea41593ab2a08728f0cfabd61672c24e5b484aa15674b20963. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:16Z), 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/QZES91879234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d17e8a957b0a6867e6ad064841986f0e70a88dda547dfd12cf2a4f1212c383. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZES91879238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddabfec9dbe2291b67f50ffe4a6420511e58e7a5754b0218c92f580ad80f6486. 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/QZES91879239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5589ecc7a52c0d2e5d9094ae854ca5f9b5a86ae322f127dd8656c7d8dc74089. 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/QZES91879240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3876caf0c65e9ad1e18ff0790374bbe34f0ef0ca0747c8ffb909a9bb80135d1d. 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/QZES91879242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dbe7ca18bf2e3dccc70ee6a7f38684fcaab6e17b630db613733b5e0fc06c9a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZES91879243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f716b9755cc70590072c24ee9320f0ad05baac54a73d8081c8db8a803061a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES92193450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e1d0456c2a35a4015aa8b9db93c6e5ee61986cb5ed1c1cdcbea1452e686e6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:31Z), 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/QZES92193451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a79d81a779a8cd5e28f75090ac149bdf6a3bafb8d500169e7e0ccaedb894f82. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES92193452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea153bce2fa4dfd0eb09d6594d99fe3fedf06ffd4065f892c4ab3e267c6527a1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZES92193454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8459e806b1d3dccc320548ffcd4dbcbd8831744b8cf41325480f24c243c8452. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES92193455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35a109ccaf186ac230171eef2ac2a0429240c2953c77c9229b15c65934b1ef. 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/QZES92193456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960bb577f3baaf2d14a0a436fd2b98484f40c66cbc7cf93618788461b9d1a5c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES92193458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf4e84a91a35f3000b158ccae2247ac83aae486f415c1bbb0d28a3ced6660b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:24Z), 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/QZES92193460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28c5e461bd2f07f9a0ee2bedf5dc4260d3269f396d317f635537e2885723c09. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM82512384.