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 0x13dbfa72259d3e2fb1da87418a8921ce1345d3e2c692591388e5b38d66ba3839. 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/f3ba5303-4e2c-44c5-b95c-60726ce95aa9.json and https://artists.proofprofile.net/proofs/artist/f3ba5303-4e2c-44c5-b95c-60726ce95aa9.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 0xbcbb8054cdee8613834998679686bcbca2133b3aac48adc9f79fe843effb1265. 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/QZHNB2130372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1e5fe524bbeab5269100b840a7fcbd5112a897af93a82529b68e1780016085. 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/QZHNB2130373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94e02f57c7ed8cefa59b5d0124c1cb57e37c7adb6bd38fcabd378d538622111. 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/QZHNB2130374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84ec1c7f82a654dd9d1d97e674a0e619e20c6e0ee895623ac9531e9ce78ddfa. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:17Z), 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/QZHNB2130375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e4f6532f0b32abceff006e92619cb05b6dcabae78cea5b16af9b8013ce51e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:50:28Z), 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/QZHNB2130376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00816b80ca64c625305d0c9ce380cccc882b473f5682604349412fefb39f73ae. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHNB2130377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2092f6b657451cfd065dadb42271258739db7fff0c3f3664be6ba0cb2264f886. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:58Z), 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/QZHNB2130378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e409d0b8fd078784c2a18d7a1c6de8b5910e07339ec903186a663acabfa394. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNB2130379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f53961740ac8aca5915e9a078cbd9db805603846c722f4feedd686c7a1e5bd6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:59Z), 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/QZHNB2130380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520fe4832e6182c40cd2ebec2767cff78d1823e9acdd88d327f36b4a304b34a3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHNB2130382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ced502217d6f5403131042a41813d07253fe374ef6a3211afe8dfa5a93103a7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNB2130383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d00462a35f5407e4f381a10b87e15248bf2a61c97d8f226c5867e41fd0d60ef. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNB2130384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b974fc4c19bdc125f21b37aabb28151caeaeb5648745fd6f2497320586c90fd. 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/QZHNB2130385.