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 0x8e3f588926385cd055bbc9365bd0945e1d98134f7a49a78cff603fc64fc58953. 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/1f13ea47-a67a-4a98-b3ae-333e4fb57333.json and https://artists.proofprofile.net/proofs/artist/1f13ea47-a67a-4a98-b3ae-333e4fb57333.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 0xf3c6c9cbbc5c1d161158419d0299950837a93c5f4602d2a3661dea2b2cd14a69. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPPO02100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b81b3da99f1724a8b7d54bbcaae090a56b549ae6fc9a6aaa0729371e980695. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO02100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dfeb8504ed0305baf0c418281712573740325de7a48efc2c8ec7d84e93be65. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPPO02300991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05be56490e9cf6ccfb0de83708db62c68a378657e291662a78cfca45fbcdea2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPO02300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239739fcf1b4fa56cb2ea7763fde2df03b3fe64b93685d4dc704df321f3dfbee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO02304551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbdc4c418501ba7027f74f146c7edd8e3c5003dbb1d7d166c277568783eb3d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPO02304553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc1d35e9359c4468bb072cf9d9718693a368762d5f4af8292b1fc02a88466c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US2S72492052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05566e3a2c97bdd3d031a6edb43d29ea8a2ad87e349c4340f93ff32767e0a70. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPO02404441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5142b292376f2966fe1acf15fa3c194d1f6b0dcb45c59b79ac15501049c2af. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPJ902403970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda882fce2ced9e8e9af772c3d9ef92ed49804bc564d0328f9fdf6e1195dd55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPJ902403980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7bdafc8eb197d1e3a2923f230e73a0c3d3a2725e36cb59724cf1238a42bb7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPJ902403990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc1d35e9359c4468bb072cf9d9718693a368762d5f4af8292b1fc02a88466c5. 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/US2S72492052.