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 0x598c0d219e9ced9172c697f4f114dffa442ce315195a4ac2982df324a0c30940. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ff5a126-71c6-481f-8458-b55d99a6e792.json and https://artists.proofprofile.net/proofs/artist/3ff5a126-71c6-481f-8458-b55d99a6e792.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 0xc1d2a0fd4b4d24e8e6417974cbfee4a27a4004dd72e74b3c5a269b54f7816510. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEM2274641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b6e42ac16e46ec7663a704e15191af5e8c1730bd72065fd6f7484c8e69f4ae. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZRP42262509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e0d01d8a1192a24d3ddf41f074e0df5128dbeb8a257600e8baa28a2ecda274. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP42262511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7c3a381733cc468cd568ee5e26cf29e52a5e5926caf3a1725261ee6c166a97. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:46Z), 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/QZRP42262512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2927599901d53c8480be3eaaacd08ce44568645c468d70b87dc48e042541a93. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZRP42262513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a8f452df5e763fe5869c0721dddb0468c840ad61f3afa204558ae805f4cc63. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:18Z), 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/QZRP42262514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b96ae380a06d2006c4a64b64cf3cc3248c06fb0438dba3da61bc50e2b74432b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZRP42262515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eba219a9d16bc46b335c278ddae355b696e3b86c4f1a3e1870a0bdb4bd0d230. 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/QZRP42262516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15e1e043796b88aa2b2f3ba3404a06990c91e87528d40357ce1148626dd0202. 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/QZRP42262518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5d5fda4920e2a007c8d4c7ee6cd1a4623028cc20c5c80285bcae9dede41b15. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZRP42262519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4651c775250ff1248f8d93c37467fb05cd7d179cfd750d830efa3cf3edda129d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZRP42262520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914df838ecd60a6d649ccffb33b0df70a75518dcd737815fb71113087fe12169. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZRP42262521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae005bda5c44d4822db460ffd4b2ba75a7ca75440e3cac7e468c14ed2bf93dc8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA62337221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b587ed3f51c68a718d43bac065213202e3eb9ef9d87953da10546df1e68ecb2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES82347247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4867bf1a2c8988a59945f80334c82bda3eafb0498d725ffc6f24aabd0e5d673. 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/QZNWT2334734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2649810cf0d55cdb7b2fed51d32e1b63e389168a3d2502e4bbe8a14d557aa0f. 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/QZK6N2432734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e5deef3d2dc244a38c35e6e37bb8a3e06d4a801deafe86a67630e54f3dfdd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:28Z), 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/QZTAT2518378.