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 0x841589313a6c387ea15645ccae59f6fb901e214fb4d0baa279810f89d400f72e. 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/d6fb73ac-081a-4fc1-8421-8c8ee7f451ba.json and https://artists.proofprofile.net/proofs/artist/d6fb73ac-081a-4fc1-8421-8c8ee7f451ba.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 0xe5b1681a1311a0840b434d62aa4f4b7b589ed914dede6e85f8088486e8979555. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P2223232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abed0a295e94db6d6fdc2f62d8fb172b000e3466767ae27a67be2bf96fa7a5d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:21Z), 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/USA2P2235763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d20c588030b27d041d8ef933465499b33e7acdf92b3e70bf09a973740d67e0e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USA2P2300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fbc7d4614b302de38bf0fd16eb1891a59a9a777959dff77b2c968aed610433. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:12Z), 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/USA2P2340811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053fa20bc0bbfa4bcbad36c480bffc312227886a82f2217192ff3397d8e3d5d4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P2353761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5616ac4b72167a76d45d74b38cd9eb044af8308f04906434bae16d2ec662d0a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USA2P2410172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3237c8c366ed0e1edbc61d7fdbc9d680ac993c62b09b80902b801572cea55f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:31Z), 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/USA2P2452160.