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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82d69b8a821d5508c9ab5c426df4eb775e1f5b9e497111c0a9e9a6f2c64f05e. 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/ff9377f5-ca9e-486b-a4c4-ec303c2dc803.json and https://artists.proofprofile.net/proofs/artist/ff9377f5-ca9e-486b-a4c4-ec303c2dc803.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mic Don Fall (FREESTYLE) [2012] [Agho & Yemi Stylezz Remix]
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c7639e93b2d01cab04569cb70f42ef83915d90c6f93fce541c73600a588e5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAW2273049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89058abd1ba7d6805e7fb1e87f595e1b5165b82e75db4b7a45ba9e23f04fa9a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2395564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3929f5a7610994ab0211a1f81c7d461cc0ca063ab3012bdc3fc9353352adf57c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES72387844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74edffc9ef1459ef3ef931ceff6b218ff09229d9a8a364a085827bef24c72a4e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2395565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d04bdf8b449677c392aa7d0a64d71690435ff8eed91a49e8d459d524567a6fa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6H2395566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37c4d924e0d68296ec3cc1acdf04230cf1f43d83fb2b05a6d2ee30d0fc994a7. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTB62490674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bceb97ac942ec1f1bd0284b826bce6e0ecae366778ae30397e2d44a994a90e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62598384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9ecaa43a181c988611b38ef7ffe5dcb9a8ccb676208edd75da06a689a8412. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES72562606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b34e6a191f3129113df6de533b982075cc79a46312ab512df32b5fb2fa9d9ef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA62594628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8395361f6ebd29f1d0cb6e3abae13e04f0070a9b70a472749d00354486a36ac. 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/QZZ7R2474264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7112d73413bb73f0cd0aac24df2014dea33b31083ee3deacb1e0f67d88abe2. 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/QZES72562607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bceb97ac942ec1f1bd0284b826bce6e0ecae366778ae30397e2d44a994a90e. 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/QZDA62598384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0727bcb4f62a738a1ec5c39c7c74d2fdca2274228c18f623abbc0343c5880864. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72562608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2442777ffec6373d4321fb4cc0dcddf569a9e0d349025c86bef6c28bc4f9e9be. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT67C2500004.