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 0x41d2727957559c8d04802a27a63931070238106d9b9621a1a692455cd4df4cbb. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea63a034-d005-402b-b164-7a3e45d5d6c1.json and https://artists.proofprofile.net/proofs/artist/ea63a034-d005-402b-b164-7a3e45d5d6c1.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 0x9a0fa11d4261f082f93e092228824ab21a982332c4341076be46a0a196040ad9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:23Z), 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/GBSMU1254594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30e3f9a0aee0e8617946a6b6bc52951d82ed3d96fe9be5e5ab6360e6a5f3714. 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/GBSMU1254595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3544cf23dfd18d11a826b51dc6dd0b9d816412b2fc2ba45b6b3c6fd5f8cfeb37. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:14Z), 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/GBSMU1254596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0540541fc8f96fee33aaa1e0f24d7ab5b585493c2b80a6ae4980bcab4e5c55. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBSMU1254599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c7f138417e70205e9830582b27a410ee1a161932aa79d44d9cf0d30f617e5. 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/GBSMU8505011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beaeeb19e34a3fa11ede3ae536a2520f775ef64b0c9a7abd273479ed07b32fe. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:21:23Z), 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/USHM82127612.