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 0x293976875921f100f564e42fd7fe6466682f30b306b5dc5ab20fd72613cc3332. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/992b41a4-7ffb-4474-9019-846bcc12cf39.json and https://artists.proofprofile.net/proofs/artist/992b41a4-7ffb-4474-9019-846bcc12cf39.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 0x15ce6298a718d2571606021a460c0324b01e45ee7d751f6ce127493bfa01fbde. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:13Z), 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/SE5IB2153776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10d6b0cd97fc3bcc4a259b89dd33271d758827c25b9675b2513c5382420f85. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5IB2153785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e22f1c709672e7a5cfd860300fbf72e9abff91d946bcffbbae65d2e0c1037b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:10:51Z), 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/SE5IB2153794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66726d373462c9bb24fdd5dd286a89bc23cd343184c6983674b878610fbb9a5a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SE5IB2200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc364e635d7207b07d9c16814397946e3449f0bf00768563b5d63e6d1bda3f2. 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/SE5IB2225585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1517a0f16e108a1db3a0f1b0b0f780d42525e2865dea623e1dbc330bfdef4b37. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE5IB2211617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fafded225b0eb8fd6aedcfe046264c3f6948b6ef47c8f362f7b96e930e6a7b0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE69Z2413516.