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 0xb1416b607921dc5885242bffc0effea00a6ef70dd9c484a4b20927f43edb2469. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60b6affa-c941-4420-8920-bd7e9a39278c.json and https://artists.proofprofile.net/proofs/artist/60b6affa-c941-4420-8920-bd7e9a39278c.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 0x79104a4f9c2d78bd5ebba4f0f940f120f774541309308659d4ab00fce1d87f55. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:41Z), 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/TCAJB2488890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08af43836652c6c7741133b1ddedd003be6c345713cd283df8a8336bddf11f82. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:53Z), 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/TCAJF2584312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd1fa77b9968528555a72d3fcbf324096ec2f523e961c34bcaa53315c8e52a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:53:05Z), 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/TCAJP2598841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75663ea1c92227330d33f872157db9a1ca5d512cc17edc96aac4c3022e69fa8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJO2598867.