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 0x944847c23da73f53a8237add659b24fed997e7b47b1fbd59050bb2727aa3c7f2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74d4a1f2-25d7-4ae2-9291-f073d89263dd.json and https://artists.proofprofile.net/proofs/artist/74d4a1f2-25d7-4ae2-9291-f073d89263dd.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 0xd3e2df70ae0cbe6c5e97c59085c4816c1b3dadd7fa322b7b50eed00b7afa51ad. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZFZ32557051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757321f281fa9c6383231228470fff6f44774b8de138a01c243b4208dd019250. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNC2524662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a4eaa9858613bb14bd716d5b9322f0595f2dafbf2b86c075a3ec880ab6671d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZRP42581610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5f1aaa030841194a810ffe0160f79d4bd9f162fb10d37dcb4e81f665df1bc2. 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/QZRP42581611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78acb6bf5f26b3b1fabae4a23657cb05c82fb45f9883aad78279a7bee88b97. 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/QZRP42581612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c25636a2f06fc8d5733ea4b291218bd6bed13428917d48d1653f96e3eead9c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:20:57Z), 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/QZRP42581613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6a0764c28aa10d20cb233fbbc41248c2636a2d6ea2538d97ece7dbdd09913f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42581614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81bdfa10e5257ab9d7f280a938d6635ebd51ca361fdb1bc85035cd6ee8da891. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZRP42581616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aed621cef170039e2335836ca7165b20b95ddb118c7107ed668f7f28e07731. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP42581619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8b867e7b44cf0a86a274e4275040c39cff5dec6d9276f1ccb77d7a04602a0e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F52591082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9664ad9f2e4b5c9f17417a856e05637814fb4d38fabe8433d15fc4d9f45cdbb. 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/QT3F52591084.