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 0x32ec633268cc7a7cc2794e89070dfb9d696c21d639e049906f7de8f9fc132017. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af89009a-ee87-4106-bc9b-a86849a527ed.json and https://artists.proofprofile.net/proofs/artist/af89009a-ee87-4106-bc9b-a86849a527ed.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 0x7ce04ec06a6195cdf9858e3e1914ca8e83bfb4d8ca8b2b75a1932cbcdf129a51. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:17:46Z), 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/TCAFG2001641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f64c5b8948a981aa2e422c98895a9403da15a7f75dba7e5c4acc08b5bc00cb. 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/DEZC62138981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbecaa44bc940269bec5bf31b3264b63cfcb28a0a05d8663de36255f43ce37f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62249087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86451ec04d900d5045d6980b6a03552d604a260ae0c79ecf266a27514e30a811. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62284053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913e914cb16c439a3d9c4e2403e35e4c2af050569bb80641997035c0c9e7acd6. 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/DEZC62211607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcfe015d932c98bebaab9d7b1e531a05c3daad3d1325e7d7656c83a08acc002. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA052406619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867323e77153d307d15918541bcf92e4589890d452e6a5958f94605edf9b8bc6. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/DGA0P2497210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcfe015d932c98bebaab9d7b1e531a05c3daad3d1325e7d7656c83a08acc002. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA052406619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf91002c57b7dac9d7c7f19180ffe4afa3a3e9ca38a9dfc8ba453228a2476896. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DGA072491238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ad7ea7a196656e0aa51a2af7c7eae38151cdbe2d400327219d73277279e965. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0M2428537.