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 0xb23e0af49d37a8e70fc8739aa7e120dc9ce771a02969fe1461ce2fce1079d560. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec4af256-772a-41bd-8b05-9ce59f33c9a4.json and https://artists.proofprofile.net/proofs/artist/ec4af256-772a-41bd-8b05-9ce59f33c9a4.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 0xc7909c78843893f52fac913493f72c04fac60d9097b32fc47ace8c0eb31898a9. 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/QZNWW2481465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03374b4a8c1e8f4281b299907ed8362339df676f467968d060654889835d6746. 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/QZK6J2490566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0695d7cfb67ff507b2abd166f2d8508381b22f27d43ef1ba462807fb1f105f94. 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/QZWFK2395806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0b73b52f2792a01b9ac5b041e2ca54bf48f074f557e767114b4172cea4769. 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/SE6XW2356460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5968cd545f55b260e39d86bf701adec4366e5f611adffbeb3f6ac3d325322. 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/QZMEN2388082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842ba70819a3189d84f0a2ad248698fb1faf22a926e1e19181eebd5b6a376008. 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/QZK6H2305201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7627e903591f6beb7acf8e3a9bbd04aa7e677aab80d564b786156e64a4aa3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB22283054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a26752f360a6db9226661c3bd3f36ffd7d7a367328a9809ef3b428a54be337. 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/QZTAT2220260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81fee53563726904974609f35b66db5fbc637eeb7106539e707e33467dbee14. 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/QZNWU2206259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af42d1297d7bddda9c7bc15b0346c9b88af10185f3418e826ca069637d4b7fb. 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/QZK6P2266614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f686b26d8604fd375f61289dbfd220c28959882fa8a623b0469b0b60e3247d3. 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/QZFZ32205682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe577117f549cde6b3e86f3a15d338734faee2f72f858c9ca072e084e896926bb. 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/QZTAT2190033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3259a86ecc9b5555b300c85dd57605e0b4c441779d99ebfdf626cc443d4f2d. 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/QZMEM2006801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac15242a839f9cda4dd902ed162d9d81698db4a9a56a8834a72551eb3ed0412d. 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/QZHN92070260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbb6663e3914f6781c763058aa2eb5ad59481d403e5c65aec2f2b26811a13de. 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/DEZC62294609.