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 0xf0e6affd916b6283b19991ae902f866f0030254affd9f9c0848d1bba086b2375. 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/93c0be96-8ce7-4166-ac22-6fd8edd4d18f.json and https://artists.proofprofile.net/proofs/artist/93c0be96-8ce7-4166-ac22-6fd8edd4d18f.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 0x5126e80cc01f0a0d17527aabed4e26576b4f961d7dd81d4ff8e9edd129257001. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AEA0D2141092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487cd9621ce4855bf55fcf162c761a0157bd5af0d1ccaf8f05d5dcd20a759d2a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUA3R2152589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f03f98bc298f875b9ac780da3bf75e465c5a90e224c91c2f631e9dca362cf09. 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/RUA3R2332507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce8f2060e4035b38e613bc0e2300b56d9ca48644d2911a1f5279f2668e3a749. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/RUA3R2332508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f52c8efba71ec608c7cf307ab649d7f307aa4209fccf9fb6c16f26fbbdd2c3. 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/RUA3R2332510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0f0937b897de7fd55839b0d7a4cf8246d9a6a346c66409a11791848bc2e1a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUA3R2332513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ddb5099130b7e46cdfe86b73308b889d366889047e2b42a384a6064cce1456. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:02Z), 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/RUA3R2332514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd345020fc60664f29084b7af9c7ff6e7cd50c05d3df8ad24540a03d318b0cce9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUA3R2332515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacadeac34fd6362f0cd02480469a7b1edfcf12fc3351761d839e5ed18fc38306. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:27Z), 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/RUAGT2476012.