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 0x42282e04f88cb5f2d306f9cfe399af5fb67a93e41792837fceb8e9cc2ee25d97. 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/708efb1c-0416-4361-816f-5c26277758ea.json and https://artists.proofprofile.net/proofs/artist/708efb1c-0416-4361-816f-5c26277758ea.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 0x7a2e192accdc0b8bb7c92e35bf8d9ddb4b0d388dcdd9774fb5f95777ab47f613. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ772443327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384af01aa52b8d402b2bfb3a3a799b6c735eb5f3c2c87446b9a8b0ad553e50b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFJ2443301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2dcfe93cd3037c80a9d1a3fb845bfb58c35d910a90d93b6c0864b42e7f8404. 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/BGA472323535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1937cbb0618a076b47aea5d513476b76a9b0e5cfc81c49101528ee1abb484178. 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/BGA472323538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274ffefc1ee0eccd3a1ab4c3106a64a036f88457bb1b8b5d35dcf48237aa873. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52259439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7176d402147e1e9c52bb2e7add0ad9f1a032779e29d208b2f1d5e1658dddd586. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92344049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54ff6aa6089b80ecd7098bf4e05f7bf3280999f972244517d36bd73b4d5188c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD52119153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a03da16ba9200fd6e582e87530141533a87b18a407561448f4b7ed032405dc7. 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/QMDA72262886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94258d4c0a504bc6b949111f060a9d438e385ff6eb014d103c07be964acee2. 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/NLRD52119110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc950f25d8d96900ea26c1be06d6e0d29e7492ff49c916e424d65fa8c57567003. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52119078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37ed1a781fd9de9c435be861a0233e7d645e5e4d6eac482440553f839b99008. 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/NLRD52119017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a4531a1d3eaeb752853b16407d1f4310ddcec46e94180e3ee61e38e4146937. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD52118952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a6a4b67a744d69d7c6720657bdd41dca0d0e6aaa66995e788b43f10882cbb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLRD52118817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c712d4d769593b5cd76eb9e6b220ce7027ad70f42156b3b45f52250f632184b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD52322504.