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 0xb6ad158214e4beea9d8f0db24969636e3d55a3b871999abe1063cc484700eb91. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3efa756e-8ca9-4fd3-8e03-e2477093d6ab.json and https://artists.proofprofile.net/proofs/artist/3efa756e-8ca9-4fd3-8e03-e2477093d6ab.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 0x2e75ced4beeb98d63553f98621d2a4f7b2678688332926cba662875f0b0b8f92. 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/QZTAU2408805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24205c81095cd8e49a81938b5b248c0c75d760d1412031ec655dd80718a006. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:30Z), 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/QZTAU2408806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80d0be5def3495c6f622ae39ece7b9ed7ce72769133f8520800de5ffdf2668c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAU2408809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bd6c2cc56a288a514555dcb0499ba4ed05acee5c23c8cb0efd7419154fb83. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTAU2408811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45427d7b10db70b5ea485a90a6ed81e79006505666b377d8ca2f9662c38ccc7e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTAZ2459812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f62e38a753fcc7632d9ce2e49ce3463cd195f9d5e135f857aa74daa0db19c2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTB32485405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e948541a97e1fee192f48fd0cdd1e8188cdeb9b72bb898866a7510993d6a3ea. 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/QZTB62442905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad2b2d5252a241c99ae0cd3c009154ccc1ccb9ea5b1de9211af20beceda8109. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82444204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadfcb30cbe1a6299eb8e52aa4aa85e7cc9f8f020768012cfe3b2aafdbbdc718. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBF2472648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec8af9f295df0e357397da8ab4b69ef6c4374be1f2453889c20014e5105071. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:25:01Z), 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/QZFZ42597518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fbf662177494c888419042126226eb73befb84eb9742f4af2372bc3bd30436. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42597519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a99acc4204f4fe5950b2fe7e85aa1f33f91a8440ec5e0b5777a1233de49a74. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ42597520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157eb4457053ce3655ea466f82aee9e38d8d151d5f728c5baad89b83f2505b07. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ42597521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db5e7a61a0fbe08c4f54da54a719129763e15305cfde2ef9588c2010a14702. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ42597522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec8af9f295df0e357397da8ab4b69ef6c4374be1f2453889c20014e5105071. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ42597518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db5e7a61a0fbe08c4f54da54a719129763e15305cfde2ef9588c2010a14702. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ42597522.