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 0x24e0779b411e14d195ba83fe8a71fccd6c3adea9b528e9bda4ca74e9a8cfbe11. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5498582-6068-4d08-8fed-45df6d0ba648.json and https://artists.proofprofile.net/proofs/artist/b5498582-6068-4d08-8fed-45df6d0ba648.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 0x94cb1873f41aaa950ac77a66bd545c075855ef3eb5defab36558974a2d5e7cce. 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/QZ5FN2555220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4300137f438e94b77253c89cb37aa419bd7f8fefc83cbb97c7055a776ee191a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:33Z), 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/QZ5FN2555221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436b28a7b1cffe5685fb5df5607e1404c8370c4fc27bc65bd801a8bc7ddfd97. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ5FN2555222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acbac615bffc64a469f7bea68e1622d7472782cab6ccb2999bfd8549748a37b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5FN2555224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efe62b929ddbd1ca23a5518e0f8281b9a3792e0df31fd78d1ed28456b0189ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2596532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932b6c536c32202555b2ebb744184e02ab310659d95a42675f101322d5aa2c9b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:54:48Z), 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/QZ5FN2596535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e51868d6265e52a73eaca75d292eb0344703872557587279fd115dde4851e8c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZ5FN2596544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6b7dcb0a14e3c5b4d1f06fa3dfd1a30c8c02a6a9ec1e0f1ff79611ef3d664. 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/QZ5FN2596550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fddbfbf0ca81ce95dd47285265cb94a2c56159ae087c30c9a8888977baab5d8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZ5FN2596557.