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 0x23280139cc1b9d903cef1d802c95e4cc88f463540b4b579356d6378977bee370. 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/f431ea63-1fe1-4df6-897d-c976b0ce397b.json and https://artists.proofprofile.net/proofs/artist/f431ea63-1fe1-4df6-897d-c976b0ce397b.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 0x6695e1fecc564f88772781f777abd1fd88a0758b03e71b687dbb2cc3cb98ba08. 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/QZHZ32293908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05c9c6fe80016271b91febd5a556db61cd4f31c9eefe21846583851a72de10d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:31Z), 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/QZW9L2385998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3899eb5daccded459d4721dab35a0dbe059f943d16f97e32290773bcd235280b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMZ92359680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2045fc2629c96c74f21e87afc44395b8cfda91146d2f8b50b4c603dcc3477e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZNJV2398993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e78d66c2b2078b6280b003fc389583c4f479668ca1e30fcce6c5612384a1b9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2340758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c356ba06d5e9c085604e79037936eabbc3fd912c2644dade01bd60fc54f34. 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/QZMZ92400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f86e89caf38e397a424fc4b0e2e763e48459688d9f44997c9f14deb31792b. 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/QZNJX2442165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2496b9f9ae512e4e76771578cf5ca076c3290bedc6b5c56b4d6d636b60896b7. 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/QZNJY2441549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf152909b734c322d4fe49e552ada00f3711d9ae876286bd3561caa491f2b2e29. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZW9K2428038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91b118bed763fa1b92ff89d42b79a665dcc2372b9916b70ed2826e312b0072. 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/RUAGT2490810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9615bcf5cb8bbc272d910d92c874fcb2189eb39a3c68707ef64d31e60ebc16. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUB732080362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6790214d913667671656303562cb31beb5d97d74c80992856c60fba21e44281c. 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/RUAH62427049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9dc42b9747750048a061afa61dfb827db01b87f93c0b5e242612543ce0ca1. 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/RUA1D2501842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12645fadfb91974c4df27dbdd94a96b53349a9dc658b60e68e05b290518223ed. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGT2522142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5c2118fa59439d04157275430f4f500f28cdc89395212e05313df3ce31069a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUAGV2513857.