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 0x13723e79f50521233f159b687d51802620a78dedee835a1041500cebb20be76f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5781e352-b047-4094-8ae0-8ae781f1e945.json and https://artists.proofprofile.net/proofs/artist/5781e352-b047-4094-8ae0-8ae781f1e945.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 0x4b99a28eb45e2ac6a0a8d2b5c64ebfdc40a3d509e9b5307b01d73f58969c2fb5. 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/TCAGF2214470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85374a7f40f6df3dc6cd833a51f27bb6ea1f1af89f6b041face7c6749e18b78b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAGF2214487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc04e87ec544cd9b82eca2c0a812338db87774e4e4bc5548b28234acb268cc0. 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/TCAGF2214498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c13f695aa06270ea1b4a006ad8f930d4fba27cde5466a6e3ee73cea8a53c8e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:55:33Z), 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/TCAGF2214507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23179640892e8cda557c06aff1c8d6c71b0aec88a1136fd1f890bd06be0d369. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGF2214512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d683e75cd202d307cef94c06aa8b904b568ec8609af36b9b62fedeacff2986. 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/TCAGF2214521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1779cb9bdc325e9184562d502d32393ae6df9531d17a2a470e3dac2ed1ccf32a. 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/FRX202488751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e2d20e51f9c499a90cdd2703e0e9cfec655776d90f8df47c00e1df88c29bc. 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/DGA052592722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2311dd8991611037d7a36908f1cbdfea9003fb5f1b89f3b59f9d2cb47ead2f63. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0S2429291.