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 0x519f917c6182f217c55e4a9d91687c71da183feecfc2465cf8b4629724f5e3c7. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13a413da-18ac-48c9-b6e7-5b1372dbf0b7.json and https://artists.proofprofile.net/proofs/artist/13a413da-18ac-48c9-b6e7-5b1372dbf0b7.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 0x838e3530993f9f0bdb0e1149896b922030eaac339f6d0323fd077b799f0b59b8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7R2471172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d0d3c5c685c5a934a17f4e9ade61945b9db34cb8cc0884c392246b1ccab75. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:31Z), 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/QZZ7R2449074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9be0822c43abf68923294437b39af2cec7cd0f493f0d1d4244064255809daea. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ7S2402123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc7a8fb985f754dd879b2eddabfa03f51cffff4e7567d27075ef39d45797fb2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7V2407405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95dca4fd4c9de6bcb1a8f43a86e84752ed42cfdbdcf2b90593ed4b6815b26d2. 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/QZZ7U2402693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45584f0b67ba409c48262b484e457183b28364f943d8f248ce07f165b11723d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:44Z), 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/QZZ7W2441767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4ead55df4b8cb9c61a9da27e21b5dccdb22f395a909d83e3ff86e9c961070. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3EY2499383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f74e41c9d12bacf21d49e88a363a6790098c4f76c07c220218f0095454cf3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:02Z), 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/QT3EZ2400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6efd0a754870a8a4b9cd008e326f98d90d43143c4b286b3d75ef51e7e0580b. 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/QZFYX2500268.