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 0xa7121b7c93cbb69e969a6c4675718b7f7d89390a14f232d07ad43520b2665f98. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5f03cd0-47af-4ad4-93f9-8fba0ef050e5.json and https://artists.proofprofile.net/proofs/artist/a5f03cd0-47af-4ad4-93f9-8fba0ef050e5.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 0x6c02d08406ace2f8ab00cc7ec84d1bccdba55e71d6c452ac3f1b6332bff688a3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:25:34Z), 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/QZFYX2093654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b27b625d008dae438c70ed3bee0e569db5724a9600f9c7a15615d57bb73c7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:42Z), 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/QZDA72077540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf62db72618bf0583d87b0eee89f51da1cfab0f10bc534f2e7c9154633947e96. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:59Z), 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/QZHN92015599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc874b9b305521100bd86a010f42c6633091e2d2d395ffe0a75f3fbb60d9dc58. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:29Z), 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/QZK6N2089758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf50597a1f9eae31e5135d454e71ada059106b6a18d566a6d4178e402ea804d0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWX2053889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7efe7fc2261ff9af9b13e4b7f497e1f1199b76825cf6ac1f8bb7cb6b1c9f75. 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/QZPLS2111232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f090aaef3b839a0cb07689ee9a5f757ff1a954e70678119201eec3cf1979887. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZRP52179261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca19c328d605d3c6134bef2ffca746aadb29d1d1cd8a02846a15957612b7791. 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/QZTAT2107769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be30b99f7823fd6e490e518082d8c1d04f3e7703635ae6761b5fa4a70643f9c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72289617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c25740d73afc52a21002438096bd99bc21484dc1f56dc469af888d2c3c65a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNA2271762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2895367b27d3a50c7bb2cae48a97e33618a21dd2364f76d9cd3d484f8f05809. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:07Z), 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/QZK6N2246699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4856a3bf4105dde89bf67357cab3644714aa954a160295e00c071bbab0a06b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6K2290953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0885780e262c8e2199e9adfd53a45244e77c4ed84a2d9ee73483b1348be0115. 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/QZNWR2361048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b2bcfa4b42b7035937fba6637ee7017d3c43a8bd39f6497fa8e010b35e274b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFYZ2482191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64974c4eff25ed5a060402b878800fb1ca3c64d393f99d794f067e51121571f4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USAT22410875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ceedde5c110bd96cdfbb7c47295022be3c6b0de0329f6c286757089b765d8. 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/QZPEW2575754.