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 0x6bc255450f66915e7dca7a6d34a5f2bccdbc647f9fb5e9a6ece6d7ff27be1f07. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/308307f8-d967-4137-b92a-e4c4fdabc559.json and https://artists.proofprofile.net/proofs/artist/308307f8-d967-4137-b92a-e4c4fdabc559.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 0xd3e3249c08f4cad54a750bf678c3ae8326c072b18c11fe73e4759cb6de249757. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:26Z), 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/QZDA52514827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f696087b766655c15bb663e0cc3d8eb293ed19b08410d0402c5a58de6223d1c. 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/QZDA52514830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6cc71fad3f97b287ebf3718612113ed0e5d6bed461f175b1d8a4d21c49bee2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:46Z), 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/QZDA52514831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034e6e268f20387aab015f007c467c7f41d77f71f4877e55d14d6727e495d272. 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/QZDA52514832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d067906f81a41f2915f67b4a0bbba65516633ffc68c7cba7974a01abd41dc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZDA52514835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81c0ae3221f3368268bf7a8a825760d9918ba5c22961fb41d86f89383d95ff. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:02Z), 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/QZDA52514836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf724ca64b843a61d28597d53c69e6f9acca684e21cfb2973c36474917a73c64b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWQ2505277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845b0c38e50c9a11134c5babca69fabdb7972986c4be6e2dee1996150d28029. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWX2512923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb37d40acbdb1c5fc564b42259bd0e8764a65ebee896f34aa61e9265a714c31d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTB42509980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa020212938a81612beaf8abc15e442b082675c48975d0fdf356389e506fbc59c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42540232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6e82655c40272bd53eda67f5e7cb8bc19267a1f85ccf7f5e22a7c40afd2a6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:09Z), 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/QZTB42509983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3214068cc1dd4ae2fb8e5f66d64ab87e35c007b8facefd036559f04f1d520c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:11Z), 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/QZTB42540234.