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 0xe80e59b2fdd523d267f6f9822ac7458e43b7c055a73cc80fd1ea83d1f1043263. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f947174e-16a9-46b3-a0c3-15e02f20912a.json and https://artists.proofprofile.net/proofs/artist/f947174e-16a9-46b3-a0c3-15e02f20912a.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 0xbdba3886f28a53594cc17fb2acb463bdf8d6dc463a2f72c661ba42d29d576e14. 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/NL1XU1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82da7d32efff7eaac8cffed02d8d5d0a52f17d6d08869abc0370813ed8fd2122. 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/NL1XU1900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df6f0eae21dd4b6516242e1259c5624513c79c876a03474dbaed3949ed6fd1. 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/TCAFC2012137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa503cdb8e6cb4f1ae10705369d074110581d2049531ea780832e71391f1bb712. 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/TCAFJ2186394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff8df195edfbca4780eea6ead0473313079439ee09aeba51392c1c6153e5f3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAFW2150481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba861df2e9cb13f5e1647b8ae12c5b133847a8b7c4ec3805bbfc69209fdafae4. 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/TCAGB2275072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884fc2e9b9f3a2bb6c712b8e977aa61be8c6881fbe9c2caa8acc594f2495861. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGT2301431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a161087339adc18e30313dc29ff0099a13a582a97c2d2ff474d0b6efbb332dd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES62520639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a78c5cf70b1a855e47792daf2dccdc610bd7906c0f3cdfa56dd1e3c63b707. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NL3GQ2500753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78965006c4dd05bb0037316aa2ad09e24a07e6677daee1cdc354fbc89297dd38. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL3GQ2500814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c7ca6ed0264ae1225d95bfdd20de3128b1f7a1fadf5c0bb8f067b1f41bc262. 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/NL3GQ2500912.