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 0x789403d873a00e1a44d8d465cce798e68fdd8be2874882ad70433cde06c9c646. 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/014db4fd-73b9-48e4-a3e6-6f78ebc0d0d1.json and https://artists.proofprofile.net/proofs/artist/014db4fd-73b9-48e4-a3e6-6f78ebc0d0d1.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 0xc4bd71d58967f79126f70129cefbf296feab4af452307cfa52b1781b80e57c67. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:14:56Z), 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/TCAFG2064130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a025dd2caccaeb039bcc51af7221d820b1c75cb9fe6093c7a54a5f51343bc1. 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/TCAGG2294090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57375382671e381443aec5bba19d9b8fce31a97c14c7211d25dbdd77207176a5. 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/TCAGG2267224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2cfe33e6a94f7083e0ff7d961851cfdeef934e9455a8d91db9d97c1b36daa2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAGG2267231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383a863ffb523189c3bfd8023887ecc1d6b3a8cc0a2d59d53aa80775034e5078. 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/TCAGG2267239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2acf28aeefdbeaf0ed1aea045204ce85f4fc217ad4fa990253c7d69112f67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2393452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7746d99700e0c42f12f6e881df06c835ae73e4afc8de95c1754deed246dd7f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2393454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff875aadfa5d034734a5fad6d6089b813df3fe4aadd93b99d7ed0cd174c6777. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:23Z), 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/QZFYZ2393456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042ae286de6ecf3f5bd1cb2d0caf01064bc9c93b9efb1855b62369ea0377981. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYZ2393459.