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 0x3c9643ade4c317d6d986da7e506bcefebc84a5815a985837bfe8dcaaea66404d. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09b051f6-b6c8-42ff-bd8a-3d088ee2d730.json and https://artists.proofprofile.net/proofs/artist/09b051f6-b6c8-42ff-bd8a-3d088ee2d730.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 0xbbea8ae712be60809cfd70b54e9dd32531dfb6efa790360892b1d892c812f04f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMFME2445388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777d29ee72962fad325e43badbd1796dfbd74fa2fd9e4c9a06b359832e33c32. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QM6N22562007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f2921170fc990995574f2a4680514fad27ae8d2996afa113a60dc107d0ce7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QM6P42574707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcb3a6e6448614af1753f02f3e983618ad9d800292054ff7a73888265e80011. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P42574719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7bfe7508a60f36d6427ba224cce17e987ead1bd69278def5c0abba74a2622. 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/QM6P42574721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554fc660996f75b4ec75c0b4288d6a302c4996c8e58abed122e9077973aef865. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P42574745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b5913466158c2f451f5de6ec2cddd439ad370cb2b0c7d47f21ea3206db8758. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QM6P42574748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80943a673304588dbe145d7d75f9ad6fa4b70008aa37f76d0b51f0119a0fe4c0. 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/QM6P42574752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36b0396d2d6e719c5634a32e327581141ee9ec227b77502c36d102d3223635. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P42574753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa71cb655ecc55fd33ccb8051d3689f7c6151a2eb66fde0746acac8dc3031c. 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/QM6P42574754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777d29ee72962fad325e43badbd1796dfbd74fa2fd9e4c9a06b359832e33c32. 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/QM6N22562007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b575681a0486dd8a860365bb811b5ac0bbb4f4d0b319bc4f6e42cd595beefd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42574759.