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 0x8f9c418a6351b866525cf3d67428eae01ff1e4c8bd528ab650d6efead8805ab5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/294d358c-94ab-4905-942c-5bc2e630abe4.json and https://artists.proofprofile.net/proofs/artist/294d358c-94ab-4905-942c-5bc2e630abe4.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 0x745928c49bd13034a6df82481afbc9726bb2138adae39f84d2c38d365d83ace7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZS642550674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac562c5bf98d2810e8493542fc97d6582daebf675f24a15ab67c7d8fcf11be. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:16:04Z), 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/QZS642556917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a43ff470b50613f41719d165e968220a51947c5630c0832775c8ac0ec288b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:42:14Z), 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/QZMHM2514538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e4c8e8795927133ee0f4c0990010d705de7f2bbbbb2b640978ca157ea073b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZS632567345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af26157a2801c87eadd6bd13c2d022885d752c03f8334474cea6de5920d849d. 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/QZMHL2529705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e4350669f0fdb2773a466ef763c566f585b159ac6184ec2b4149907e281c1c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMHL2525578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a78e17fb782a20250acad651da06484b7fc43a84f35319500129d0ab1f27c9f. 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/QZMHP2513565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb406b2b80fdb16562d6c49aa8248db63ba99317e9c3c8a1d3e0968c328def975. 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/QM42K2516537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c93c06b8c477eaa6383ff0581c4d768a4cb3ae5ce5d7c98bfcb04b7bebcac. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:40:06Z), 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/QZMHM2518990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40afa82e24830f8cba2b0e77257a42c8888b424cc1cdb1e25760c3abe7d381ae. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZS642544648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef2426fe46a4a05ce97dabcc1afef9dec4d45d01465baa78f6415529d0fcde8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZMHK2585500.