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 0x9aab5e3f69271c425decc3e7b01b3a8b56cbfadb768184a8ae7825c4005a3dfb. 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/fc49e135-2771-4b66-8769-284f3f761f7f.json and https://artists.proofprofile.net/proofs/artist/fc49e135-2771-4b66-8769-284f3f761f7f.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 0x25bb26957c82981c99999cd2658c19ce9cc7b1fb7e86ec63c8a33a4c85c16c79. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR2X42295031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a28eca75d7ee9e0f1c1826022ea8aafdf9d8cfc2a30c2f55821607ab141e7e. 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/FR2X42295019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337110e5f966977da4cecb7d5bca641ce293e31931f14df00a460a22e91eb50. 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/FRX282239925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b150ed729654bd89242a39fa9d7ccb6bcc320420ef4d9851fbe9f19b943f8e. 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/FRX282241923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89c87aa803cbeb51464eb5679decabe7e106cec828aec3b23b4f9a135e4e7e. 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/FRX282241922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12477c10caa4bd47f0ac07c1bc856fec39dcb7366e5794203fcae0502c8f097. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FRX282246683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4689401e45e22ef7b6d211bbaa6d74839c64eff0616722af281cec27b7495f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:45Z), 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/FRX452219242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda5f575387c4732b2ae09e37bcf393d3efaea74d0a24e34eb038f5dfa2ddc5. 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/FRX282381849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a781badb5d3f0aaf971ace178601e531ad6b70172e02775a02110cd0e68e70. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR2X42422654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7381af414e82770b443423e3bf335167c1e65b4e9b79e212244d816539dbe4a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:32Z), 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/DGA082476789.