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 0xb925eb5fd5aae63ecf5c92311d37280f622c7dd06bca90ba8dbe15a3fde3a34e. 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/fba50b46-599f-4f73-9cdb-1a9ee5a9c9b0.json and https://artists.proofprofile.net/proofs/artist/fba50b46-599f-4f73-9cdb-1a9ee5a9c9b0.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 0x506d5c4cf6b6321f86f223477750961917fbc8ebd64489d7a8057aa3ed686b6a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CACWV2352559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7de98aeab70a0e314379081bd86e97eb3ae8a5bb211f242dab0a21965d78e. 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/CACWV2352560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7540db0af50e0aeacac96802c54b6f22686fb73a0d4decfc702f1ab72a1662a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CACWV2352561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7606df89d73a253b7349f304d16b1fd71cd1d687f6c5fb7c40b860370db55be. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CACWV2352564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964bd47e04336857bede7c464288dc01ed1eed3164ebed91ca82238cc98c96f0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2352565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc163c3a40e798b5b0fa780bd5ef9bb69e31e2f9276303c216005489c6d545bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2352566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898950f634fc3a7cdd9ca1b8d21e8378dc924fd62d76b89e94365a6170f789c2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:12Z), 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/CACWV2352568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268630945fc53eb8530f47dd33f85e84b650f5ec8914fe586e6f27c162874365. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2352569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2035179ebf42f7ebd798144a536e0fcbc14bfdffe5bfeb8e23ba0fef22b0a5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CACWV2352570.