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 0x536d4cfbc09a911692cb9ea960ada664cdc227fc0722074adf30789043fcc562. 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/a25476e8-74f9-4299-a6a7-ff27efe23a1c.json and https://artists.proofprofile.net/proofs/artist/a25476e8-74f9-4299-a6a7-ff27efe23a1c.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 0x03bbcdcd0810ccd708d3888ac6488fa82214288f885ed06333f8d93a9cd1ed55. 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/TCAGE2289436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81acbe3e004763f350d2fa3ab9adb0384fb6edb1e81e74ab4c6efd09e6a1c950. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFN2137337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc9fa86de77227f90ddacc006538f700ad62e20ccbdd6380a7685205541dc88. 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/TCAFM2106142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5f5a59a9f0b9ca91a6ea7b9240928ffc4898a85dbf588e8ebedae0a5c89868. 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/TCAFL2197400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a363582e997f6251e9093e36aee256669d4dc5ba41e86d1d4fc7e6a4d9a374. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFK2197157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86112443e773626ae47f65db5bcdcd6b433135d727fa25429590a516b64e3716. 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/TCAFH2099826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91daa77add5f19dae024627e69117bae93d24620f03656ee025c104ebb4363c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFF2046079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88415bf85c5adc6532f95210ac85d085945105b0e4080c6457d60d2ef8e2b82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFE2043672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097811fce67a72784141e8ac358993487c9a44bcb9b8aac066fcec23f093bd3. 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/TCAFD2057723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b79752334ea00a5f5a3ef524249fbdd3350e749c121a9c5f53485774c227f02. 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/TCAEU2096871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8923ca488ef07542d615fc789f8fd9b6dca4923475cb807adc8826e16a3455d7. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCAET2002174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd491b93a770aa282918c7477d3f62cff90a368c50aa874808fbede0d69e299. 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/TCAET2008607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d41fc43498945739da8ed859ba9dd17cfa49a5db5eb14d1e6506c875d8c43e. 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/TCAER2052656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5903d425c8ef5c177ec4e712234b18549ba8a83968f14f66e032862c2857da3d. 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/TCAEL1971016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe339993b8a3d5fb198c99b59e517e2db6c9847e4d4963533fbbf44c034690030. 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/TCAEC1979653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd614d35470323472280bdf678176b1fde0f190ba492c25f99b67bb3b9746c95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I32139359.