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 0xa541d7baeeb04d1a3a71272b0ff13c7e03258b00d530d651062195ba0fb0fa4d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bedcb56-a506-4721-b760-930131febff7.json and https://artists.proofprofile.net/proofs/artist/2bedcb56-a506-4721-b760-930131febff7.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 0xc5f65bfa15f4b621b06d664aaaff8e1b4564defad13c393dfe406056b93f44bf. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTBF2529863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6443ba24df4fcc29c69389b9b8d708007f0b4ff2cf638345bfe1ac2088ffb27. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:45Z), 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/QZNWY2189695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06354f88ec3b3fbb1e8bdad74e6f697f49c4dd493c0ab19fefba3bd918ffaa2e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:12Z), 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/QZWFP2519052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4501f207ab2b4185a7968175ff016ef6779b682d7aeb3012e4a1b57def69fb67. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHNA2238743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59764e751e245e1fae92e363b5758c123d8052b6183fe6f230ff9ce1f52ff434. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ32339874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e465abab45a39299f2d2ebf8a1fdf8b10e84cf25a7dc6e8cc26a6c48b1df8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92336366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd41ce1773cd94afbc97338103a0c26ec5328f26502d4ccd2b7fc1210dabd9a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS632202454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82887b5dc7841d3cb09d2e98c0dd6ec7c03474f83fd9c13e64572f0f0e4f34b1. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZES52599569.