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 0x0cdca63302692990019f24384618e8222de30349ce6789a6989d728a72645d58. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b2c3de1-cdbf-4ff0-a51d-a7e2dc4a9eab.json and https://artists.proofprofile.net/proofs/artist/7b2c3de1-cdbf-4ff0-a51d-a7e2dc4a9eab.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 0x0647ded0bcc7e2e317d0014d04e9326adb4534850b7bcc6e06c8d0f8b08c8154. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNB2301856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ded6c0405749418f100d3127f779941d5c431e78d22aa99a506d501cc03e7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:23Z), 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/QZPLS2350683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef727325cc07cf0f2f0bbf2d3602e49d4f1e100cbd782add920574c33a0a49b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB82309025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4204315318f3bac96086c4e0e24d2175e37077da2c8161ed6cf54b3ebb228aba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFH2355553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ccbd33dbe0b722f4d7f1fb9fa04608c7dd88bbcb0ac5367fe7c81294997c9. 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/QZFYY2498052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e925e6c93208a9039c0a96e006ff1d2d76fe9ca9caf16c34b1d3b8c497ad6f9. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZNWR2469344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788fe429547e8112b8a4182a147810374a40e83662200e6b533d8c8e7cf5244. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:25:30Z), 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/QZTBB2489561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd4cecd6903720a05a726502a96c73f5583652e322eea1a6b1d23bb6606c38. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFU2458925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058e1a666170b12ba717c09c97589637afdcb0416249a195fb78465e07a8d34c. 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/QZDA72511217.