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 0xb1716c3b18b1cb874dc21d8486aad9760b57075aa6c2bcbc4b211866e0c9e00d. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb60328b-d257-4c77-a278-2a25ae4d5b3b.json and https://artists.proofprofile.net/proofs/artist/fb60328b-d257-4c77-a278-2a25ae4d5b3b.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 0x3ac134817200011b93db844d289f86051cdf396771000e30a40990f019798b72. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:42:42Z), 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/QZPJ32323769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d03248a8cc6ef2111f07cfdc0ce9026d7c7c54b8abd9dd8a2fdff3ba96b0c9f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPJ32323772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff204bb0d9b7bb5186bc633d2565b95fbed9d667e30b70b82e5f886bf9aa25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32317714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873c4d18aba1359dc96b7a97530a9124b06c27e2303fb3e68db21cd8d52ac62c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPJ32319612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a614112edd6216976a7d905cecc1ec59ce764d323a425e8bb7993cce7eeb144. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPJ32330559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94d762088c7a777b0022182cd2bf0be1198a6eb5a26746562eedff3c1ddbdc4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPJ32344041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea68dcba80c5404fbccdd3361ee40f4d6d7e15a10cb30eedd1f8af388c10ca8. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-21T21:48:17Z), 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/QZPJ32344044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82880f2ac7cf92dae3bde1cf06389bfebd298946c48dac49093a88210b6960b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32361342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff204bb0d9b7bb5186bc633d2565b95fbed9d667e30b70b82e5f886bf9aa25. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPJ32317714.