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 0x4c334bc5bbd678d6eb8abeffe16659ed6183ffc31282b4df7aaf1fa1aeaaaa4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca1bea1e-e1de-49d5-8e7e-fb8375216157.json and https://artists.proofprofile.net/proofs/artist/ca1bea1e-e1de-49d5-8e7e-fb8375216157.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 0xfe0a86c1b108b34be2b1c666bd329e2efb8f992cb43c77e1515f4aaa7e0e619f. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:55Z), 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/QZPEW2591618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd97b0cda2519cc8823e4c56ce2af3e849a4689523dd6c5874436f1d33fdb8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZLBC2505676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2041ae9d03de347d5e47cc52f80fe19c2ee1209e0d6d1dd1e25d3830076c36. 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/QZLBC2505867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4886bf8f292dde8fca935902e4417f5a5969a673bd2e3408a2bf5f7e89f2ce. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLLT2507422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7becf12017b7863a9339b1e56a6a7e977ecaf6aef3a280a4d5f897c9a1ab7204. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJO2585423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b099e0a724608005081b5b541b5f39904acf2dad06198d7968b3d92968a25. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWDW2514673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dffe011a4aba5d9befee1256f878b9802748f52b48f5384cf5ea2b78cd7223. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:55Z), 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/QZZ7P2548705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8860b095b5317aebf7d3d70df59e8e400f321edfa367fcf0878c7b050d076dd3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:45:00Z), 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/AEA2L2505620.