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 0x15b300c608740b2546577af12c27371d593453b778f88e1dd1a8d5df046e2673. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901324ed-0115-46a9-8f74-81f63e66b64f.json and https://artists.proofprofile.net/proofs/artist/901324ed-0115-46a9-8f74-81f63e66b64f.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 0xba7280606ea846526dee63bd4d773b563e5f0fa1213f28a0848a516f670324d7. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ZAOYF2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624102e9e073fefd80c9a92885b533881625427528721558a5897b163206f2d2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAOYF2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6327c245ad595b95139163f0e74f1e4abf1c2fe3dd0a81c4b6d1c7a134834e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ZAOYF2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74c16331c1816abb6fb2ac98b7ad9f09714e2379d426adbf4eb2543cbd2fa9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAOYF2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2087e4f64d573ad94724ce4d44a8a61f4b21db26b20a73a56a9ebb4f033b3dd6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAOYF2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68791585e492ea7aed0b429dee004d2c60073b39aa1f76602b29631dc8aba11. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ZAOYF2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987d95264022699640b2c3113c0fd9a51dc036c5714ef64d51a50509d70a047. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAOYF2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8861b2ba4c68ca97b405f5bb23ee2448bfcb94cf9a44f4b17e2fbedd1b0535. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZAOYF2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef0a1b350fc0123b2eff9339678e912e6b6a900b3e98aa1d790ff7a877a91e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAOYF2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb1495ca917dde7b7d7117ab598e7d0efbf9bf9e626ce7aae77758d58ae74ec. 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/ZAOYF2300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64da47f011d74ebba130e5bd0475514b17768e48ad9b2a3880e963dc285e421f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAOYF2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d46e9666084d1ecd50efb2f7eeed0293dcb4402a9fff2f8c2562edced721dd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:01Z), 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/ZAOYF2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2d94113e2286b1d2604d976654a3b181d8025ae280e58e181b826e9804571. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:56Z), 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/ZAOYF2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce45ab12df3afcd7ed4b629816679432583906f9b17e0668d97812192d161bc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ZAOYF2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aa06fb9beeec4d6a3108ee5d427cd08bd2dc01781307e64c1a52bab085e539. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAOYF2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4a784ac6fb3ed8e86bc5d11b98206bfb7ebdf9452f330aee532f9289310e42. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEH742531122.