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 0xf355b7cd150a0a297e033d7fedbaecab930773447e0d0f0c8322dc2d897a092e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf94a937-f5f9-4d7e-90bc-1f8fa6ca352e.json and https://artists.proofprofile.net/proofs/artist/cf94a937-f5f9-4d7e-90bc-1f8fa6ca352e.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 0xa287d0748ad4879d32a9f05e9a678ead2024afb6b5cd8deb2b9c2aafd039c252. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES52187951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00f288d70b5b48a4a71cd5459aa865866c36aa697cefc173fb8535c9dff1022. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:45:25Z), 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/QZK6J2121748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfd769686a883b4979e6110060472c5b6a0f2aebf4a4de0edb19d521ce36b1b. 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/QZMER2266144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b35191e59f0175c1e01c36b32caedadd5227d5659221eaf0b03a96f75211b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:12Z), 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/QZES92390944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb132bb00d4fd25bcce5be8315cc51809d594a9c9e801daec762ee9f1466f3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:09Z), 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/QZNWX2313066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0b205ec28ea429eb7f2ce46885ed16463bd3c8c5089dbb159f134e8a39875. 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/QZFZ62436877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb132bb00d4fd25bcce5be8315cc51809d594a9c9e801daec762ee9f1466f3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWX2313066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0639784757ab6db53a9f3e846410310a12e9273ea643830870adf3b59e0915fb. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:37Z), 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/QZNWV2436210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4ab2c6deb3882ae30bb811e2d18f4031bbb4c8248be84bd73c1f79f793235f. 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/QZWFH2453320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e18cb23d4154d4e7bcfa27b779d06c5a0a2756c4f5c77451d3ae5c06102e6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:57Z), 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/QZWFJ2438921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87560b422e116167c046269fbbc92e6437b7d7bfb219bece5cfd01992a4bd2e5. 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/QZWFH2453317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2d082640fbdd155b64007cd2ab29135d5705983be149de666ea198b68e5936. 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/QZWFJ2438919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f976291613c3db9f1fb978aebc5ce6ca9a6cbf690324e284543f50fa0b1c23f. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZWFH2453319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e18cb23d4154d4e7bcfa27b779d06c5a0a2756c4f5c77451d3ae5c06102e6. 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/QZWFJ2438921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518b5c32d96be4469bfb406108d7a0d081d3c8c60e78bde92387c9673715cae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUGBT2537443.