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 0x538ab25e88045f2d8996575a8c7e38da094b74f11068fad859ed85704829d850. 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/6ce8c278-f642-43ec-9c7d-ae55e83c6132.json and https://artists.proofprofile.net/proofs/artist/6ce8c278-f642-43ec-9c7d-ae55e83c6132.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 0x0eb036db2dadd759cc154d9aeb2d8211bee83a9bc6f8e88abe3c19da33ab4b7b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:15Z), 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/QZTAS2324629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88c612038b968dc98ba511bfa670cbd9f05fb6a0ec28c67c793e2062f1b5a1. 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/QZTB72308292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda886e321c4cbcc26fed8843a314b8702293a05e2186e74a64f7871bf8ae4e7b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTBE2395654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d67e6d3b36bd181c068fab42671f11e6e0c74fe6d8468985f94d4a1a536178. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:08Z), 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/QZWFJ2387682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddf2721f465bceacead4d0689e4391494cc6a21c781d7eb569eab2d8a4c9b6. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZWFS2330754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778ed015dd1d3c491f724c25b69ebbf53ed2f06df5663f03e8ab4232fb6f1d7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFYX2411004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23170f0f30236824de3f783cd7f2330b260be07dd026afdf587733775b52a0c3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:56:32Z), 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/QZK6G2571051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d938796ba0a6fe8bc273845ecec8aacd34c4cc0469fb21b6eb0a7a476673dab. 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/QZNWS2514787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5469caeb0dc2075acf6a970b8a95cc7a65150d126b25b7fc771e35a97f7246. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZRP52532965.