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 0xb85ac05241143d87e90cb2c99c037095d656ea0bc0da3b054d8f808f1a1620b6. 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/4ca80a9b-4f16-4dfd-9359-ad5a0fee376b.json and https://artists.proofprofile.net/proofs/artist/4ca80a9b-4f16-4dfd-9359-ad5a0fee376b.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 0x0a4b9499127a6528fa6241c1a81e516cfe0d2939f9c3401ec0de56bfa10d67c9. 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/QZNWZ2175352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0824df3bac2662f4e163ae475d6f12aac89506b82bde27c81c37d3d2c97027. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:39Z), 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/QZHN82289650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05105a1561a68eca2f2be811d67772175439ee61e54ce69b63df67e02387623b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNB2282313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf435f4aea50b7717a6ac2f0c78ab75a9f47957960b3e9b61652454a3321c1561. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB52231927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d65d1e9a91149c41a26314cb81cb1c9aff34491d424d1988a816564d14d49b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:50Z), 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/QZDA82368967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46493e65ed6db29921a7519b3bd32bc7c7aa40ea2937befc49530ba2d4e0cd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:32Z), 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/QZDA82386673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d0da2bbce34b80c08b0ea178f2e9369d06261928047701f442c2752fe19bf0. 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/QZPLS2328679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015918631af8f2bab2149efa99973d0028d0a15b9d2706fb43ce4fc35191b15c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBF2331404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3bc999e10746489ede5a52d5c3dc22be4178e2dcfa4782b82c20a757f69b1. 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/QZDA82447991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f11208b1210f7fb1d5088f8cb580944887b1fe991001abbcfe6bbfc1e4b2097. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:49Z), 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/QZDA82447992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70399105c51b4c05bd26e619ca060e00b5a974c928218036a4440ac73f26ae39. 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/QZDA82447993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f0926df5cc1b855b0f160207ae4b83d7cc4df70081dd981b1ed05ab10ffbc6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFT2489675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f70f25329822afa3e086768a05b3582dcea41572348324351bc8c95d317dab. 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/QZAKB2511286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca46ccd4e34d1d610f3575ea475d5694368452773a60173a02ff56107605cc17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWT2135185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ddec83682d93f616221739817bdf5729cc6516fd8e9ad8cdbcf9ea6f84fdc. 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/QZS7J2321257.