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 0x640fcd5f360611fc57bd62f530c7b8d1d31a1b5d7e7712261361ff78f6ae5dac. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d426406a-be07-478c-8767-e977f2580ede.json and https://artists.proofprofile.net/proofs/artist/d426406a-be07-478c-8767-e977f2580ede.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 0x8247a794d1e7fcb0f8395e6a870163757476d3baa4d5de3a153d5e36892dc572. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:12Z), 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/FRX282018525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c99197d8235b00ed77983a38d4e1be789998454bfd18393fce001b4d01fee86. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IND712000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d4ead92fe4c6dcae9cefeadb8012151dbe530c6d324ae03d973e91f6b4fbad. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/INS182101013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8213fc3f71f727a9a86e646fca0f5fad9cfc37fc8d7df8da9161761c3bdea3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:45Z), 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/IND712211880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1849dfc90d91c099a14010d2d7ead0139c351ed7f8778d7a41602721830b07cf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:09Z), 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/TCAGF2221161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3fbb82f298902f96187435eddf230fdfcbdea6460d778ae8d876974675aa93. 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/INM432300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b57cb1e7e35c9c05e30cb8338f7b99daf36542135f91d6102add16a2492c24. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AUBEC2319474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebb74821077ef3573c5678e548aa98ae97fc658669138ad7a55c222fe7b3e16. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INN172410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94963191fb33f99479fdaf57386a4db2b87ccd1183ed78b8579e54a9c3d263. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:42Z), 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/FRX202462987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa0e1619fd621332cffb559238698da3d95c30b195dd414bc1f3cd939dca660. 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/AUBEC2461762.