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 0x0c3cf6909656578b673b3e2dcac97886eb947618537762bbfaf3f8b80f5a8f5d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7793a2d-426f-464a-aa47-2a8d28d758e8.json and https://artists.proofprofile.net/proofs/artist/c7793a2d-426f-464a-aa47-2a8d28d758e8.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 0x75b08ab47f71dab1b3d49c3dae4773d5f6edd6b709cb25661b37f09f76712074. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZNWW2151578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb18446438d3c89aebff4d7940a3f634ba7c3cf23ab6cd0fa5239ebcf107597a. 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/QZNWW2192455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d2a0f54381a5c0521b2989b29356845e03c988049ae81d431a4bc744220413. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2151858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4740b0feb368551b16143a58cb69cfecb81ac912b1f6571beb4134de7eb4e04e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:47Z), 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/QZNWW2192486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf7c9ce01991a067c5e0a44f452355d7b7390aadbde79bc56ad10e4aa9dde85. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWW2151854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508c453c3e47ca8a9d7646c1d5bac4451f9d36c37eaf8af435b03a2a429dbf2c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWW2151427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882cfa33de32d77864724850bc76bcb38bca128d465c003caf07031f950ed75. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWW2194825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d9e0579b9825aa3793fc10e13a3b9de5852dd9d268f67071899e97f28b538. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:04:44Z), 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/QZNWW2151855.