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 0x1160698b25c87b6f335517763b2f5714d5c335989ff10e7fcb5589235d741bec. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b7d2971-a1be-48f8-84e1-ddac68e9bc9f.json and https://artists.proofprofile.net/proofs/artist/5b7d2971-a1be-48f8-84e1-ddac68e9bc9f.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 0xbce826be59fce9e85e5c140a4b7c610ec12f5a96876fbf7a7e1c0710f61f3e14. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRUM72301771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f84d0956c0e9417ff1832ffda86788c2ec65d0f83dec298425dfeb7f048dae0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRUM72301774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5feeef9f16325382ef1a49dab93b76963ff497961d8115d17cff9ef3c224fa. 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/BRUM72301775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277156896713958bc3a529febc55cdfcfcb2138af92dc04371e8898db1f3f182. 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/BRUM72301782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c31f857850c16135b25f5a543b65e90818cf227eadff1b686118700addd68d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX6IQ2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cdd07c8e3ebdcf9c81ee87b656fb8fbf486d2ce9b1a42b2a082a650207b522. 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/BX6IQ2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d73c9afcaa669274563d9689d5f4ce0fc04d29ec1e84479e6175f52ec21ad. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BX6IQ2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a6e4185a2dc701b361e02e68b5248c4496453dc0217f94b91c502c9fb5b461. 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/BX6IQ2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0aa4047dfee64fe443cb89f97e20e1d653d165c586b95845febe5ea2d305a. 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/BX6IQ2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7671a6cab8674a6a155fcab61593c3d32b546433d8b5558e7a0d4c851c086d22. 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/BX6IQ2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461f6d0b96aec34661aacc9b3b5733d4bdb5173ab483c38b6d31a6d0c2f1024c. 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/BX6IQ2000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2838e864e7e07a13856d8e27928ebd7604d1fac3165cbb0655192946bae159c. 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/BX6IQ2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25703dbc49888b12f4a5890a11a66ecb9ed87e9511045692b4a5b83c06a79ad. 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/BX6IQ2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c693eedbcfc055129e9fb398371e2561d896e42dd906760c0209d6f1c8274c5. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BX6IQ2400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338493672c703c7ce4b7dc35f4a74380a9e0aff9b429916112eac112c5bc6a8a. 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/BX6IQ2300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a4a40b29b8969727695993bff0db7fcf4dabb45948aa384489c77fa44ad8af. 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/BX6IQ2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cf8647c070f83da211987450041a549bf9bcf9dac45df18744102138044523. 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/BX6IQ2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73569343d4e31e826f3eab7b6ac0e0483208c682d873fc1f2769be363eb72e7a. 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/BX6IQ2200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db29978da5cdc661d3e77e694b752167f4e45862531f8934f80bcc6ff943cb0. 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/BXJNR2200002.