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 0x575f3d27369c6606a85a23a6bcb8df100ddf63701c87bf1b4bcd812a6cb637ce. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e552bc40-42ae-4734-a775-45e2d8fdfabd.json and https://artists.proofprofile.net/proofs/artist/e552bc40-42ae-4734-a775-45e2d8fdfabd.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 0x85c5517a6db5666ef2bcde97f41bb274e77d14de4bb643f62034619749db473d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT65W2583412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795eba45efaae1ac0563497d2f8009795bb55fa63c1768528f2458b1f2926f0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT65W2583419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac33dc6cf371f725de15fc459c62b7aa3c1e4a6d66713a0ef4e695fcd4014e9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT65W2583428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a0ffc93eb5991454fc0b8fb1f1b979083ecb888bc9438f6b50cf19be66b0c2. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:13Z), 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/QT65W2583433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ecf3927f9275569766fb4d98a6627cafc833fb01561d759d3ab2720634a4ca. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:32Z), 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/QT65W2583436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e6b60e10f6d4a0cd29e279756d7903da9fef2f46e2de6ff5980f908842a64. 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/QT65W2583441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8f6179b4573edb1b71f18940ee718ea3aaad31ce3a18dae69134c825ba876f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:58:45Z), 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/QT65W2583454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf26d3da7f1968ea4082ab265ceff5003cad92d327d02756d8a58893add6a3e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT65W2583456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233e602bf2e1f81397f613f655561848fef663a699da2d7a20194c2b3620f7d7. 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/QT65W2583464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a434d2dc7250cd717e048c827f13942df36d19caa8f49f67958055aff691cc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:48Z), 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/QT65W2583466.