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 0xc2950ceccc8837e069500dea204409b6a1dc1f02105122fb7f6b60939c4686d1. 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/02d17175-95f5-4f82-b97c-5b0939c7a6e2.json and https://artists.proofprofile.net/proofs/artist/02d17175-95f5-4f82-b97c-5b0939c7a6e2.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 0x7c0c4ae0988d6070aa3f1e8ca709ec110bb278d48d918fa17cd979e23d9931f9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ATDW81700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a1b247ab73f11633c81f8e3b06ffd2abf6846e97de1c517c58e92bc936e5b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ATDW81700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0053f325d2d031771825798cfd72f9ff75461fb2b5db067f96a4b8d427161ba3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ATDW81700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d163333377328f19992846cb8d4cd4662df9890d8ba36095bcad5a8db2468. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATDW81700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb6f1c7337a00e7c56ce5757108d79d81c4296c806e3f59279a46b9e2c7108. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ATDW81800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d511582c7ad459b3da076010cdc52b02d1b91b8f496fce3e4e7946033b5e2f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:29Z), 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/DEZ901901390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e288dc7d5e2f12d45492e599b693659db70f91c1cf32bf570776bc37d2740. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:30Z), 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/DEZ901901394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee4adef9735296390e2734ac8980d45842882149b720e23743ccc770a130b5e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZ901901396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c5e62597f70484907085d0e960b043d7667fed2b5ab5a5bfc780d8c20a1a7. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEZ901901397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5c1f81139b32536503ad057eb71e3ac6bc7d524f40819d6927f8c6dcca560. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZ901901398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf976267d7b353312c7a0f346434f02ff8178aabf1140225e332f8ad5b4c26bc9. 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/DEZ901901399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93307c52992e57bd889075e98415a757227569b526d3ff4e29fb0ed2b789d13f. 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/DEZ901901402.