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 0x68e0de78c19290bd6d4e17ed6a02bea1bf8677c41482f9fe73524c6dacff6b17. 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/ff03b920-8024-4980-9a7b-685a98bc1e2f.json and https://artists.proofprofile.net/proofs/artist/ff03b920-8024-4980-9a7b-685a98bc1e2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
18 Songs Of Epirus - Greek Traditional Music Collection
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 0x34b260dfd4c42eb0e58b69cb5f9b34b50566fca3ba16290503b834235720b27e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRFM19600837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8713ef1219cade4572716eba6dcf9922eefb9b991e91d7288c8cdd7445a1ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRFM19600838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0012af870dc55fb9c940086a7e8437a069db812e084f30ec86e4a84b93dbe4b4. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GRFM19600843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97b4c9610c0884c6f237d1c9bc3a839c8a0f41f0d48b1c1612f1cb2752d598c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:16Z), 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/GRFM19600844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3c6e2adf937c8dfe4021e7dc39e0d2a94cd2771a98e0ca2c453058d1f025a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4TW2586592.