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 0xba5e41c9d724c461b84f85c2d231bbb67f51d94d428b46276ee2f51841d2acf0. 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/ad4758ec-3ec7-4f7c-afc2-035caed8d4c2.json and https://artists.proofprofile.net/proofs/artist/ad4758ec-3ec7-4f7c-afc2-035caed8d4c2.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 0xcc2b1be173d7d18b3c4281069c44a11fab5c5937ea5274a1aa5ed7338aced7e5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWY2060381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83f79f79e485f566018a2e13911d00f054f0125dff628e6803c52ce82c4e3d7. 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/QZNWP2150132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea6708a290b398d0046b78dc43784dd51bf11e792fc51a3333d2d9b7191d7fe. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:00Z), 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/QZNWP2150131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83f79f79e485f566018a2e13911d00f054f0125dff628e6803c52ce82c4e3d7. 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/QZNWP2150132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b529aaa7773daddb1f1461e2425a9bfa0d1c4723dba5406415a8edec761c332. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZAKB2433055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5f639b5fa3289d1788594a80efc589a5e9dbc5e6cc337ae502e67b74c1702. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZAKB2434548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391efeebc743c99ba7864bac2642af63f9babb51076505afdc5c047a73d529a8. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZAKB2434549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6829b0cf3e75077d9f9fb1475f4e51fa8755b20579cb69bc9330923a550ee2. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZAKB2434550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5509437c06eb0d8f4584d5b88053c6ea5ed6e6de328795a81a62a7dcd291f49. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZAKB2434551.