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 0x80412ee5eaf6389287374bb59c779401eb0df08c12e1fdd632acd1b591cc3a8a. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8de4b1a2-215a-4226-9d51-03dc41ba741f.json and https://artists.proofprofile.net/proofs/artist/8de4b1a2-215a-4226-9d51-03dc41ba741f.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 0x8f9d9f21546d799eca300214bd490ec304049e200b44647bc1af7b09a5ed3174. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:10Z), 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/DEOV42401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249c77e4541cdee405a7e55cc0533d9927ea721ed2daa9883de9b5141e13f45c. 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/DEOV42401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aad9a6ac0a499a3a98c3d3f05008b3448f682b5820b22eca1620f1059038b0b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEOV42401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c78f5848f392a8b91d12b6e9397d947b4b9e72b25bbc5d18cbd30da6ece6e7b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:05:47Z), 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/DEOV42401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd2e6de89f9a7331b445d34f720f42727b5605802522307bdcf8694e3b3384. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEOV42401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ec8e94475c150f270135f3473930b43fe784f081e5745c657482dfc0cf721a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEOV42401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018c694f64189347538f46a4e2bf4488c0dcf9b365b3862af2f09747ee5fd7c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEOV42401111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac4f16d632f2fd7f2763c33c615b9f8c3bd2bbd6ba93297002f5218ddb2a23. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEOV42401112.