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 0xba79727f124287c1fb3648ae030c419d07f83ea40cad8832989269b3db936a5b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7db5871-3654-4cf3-b1d9-3321aa6c35e3.json and https://artists.proofprofile.net/proofs/artist/a7db5871-3654-4cf3-b1d9-3321aa6c35e3.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 0x10ae88afb098d67e919d5433a81081a0bd430bc740fe35616c32c518a9efce41. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGT2314589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a152ff64003ea7da13865ce79094cc49b8d0bdd2dfa2dee09f9fcabb8706b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAGT2314611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004fb3317dbe54ae5dd1b24dfb63644a5944ca5c6489b223d0f3fa881e75a3b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAGT2314887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429bd681458d11bc50abbaaf6c47f94fe8702358bdd9997d42cdc0a4438f362. 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/TCAGT2314899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a8cabf75562ab2b96d560e5e9d65567a905cc65f287d34cb733082e45ac3c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAGT2314913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb36346bb2f2e794557a2130501eef7928a385a5655691cd2b1c7901a1c557. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:02Z), 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/TCAGT2314927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d92c095d0889d9010bd2c86511ce924f47891f194f55dba00532edcddf20dfc. 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/TCAGW2313496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128cfc7b6287d3a624d5734828862316f8f30bb35b4ff26d629706d11e0defbb. 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/TCAGW2313538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f3fcbde837afc2aff4e42e2d1d89906307972fb9b4410fffcceb963e90d1e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:55Z), 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/TCAGW2313542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb9b43810a7e369ce3f06ef5df3b51dd2096542fe378278df40e64565b21a3. 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/TCAGW2313545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ec9fb77e0c46089662d629651bcff5d13f9838a5d05a085f667fb9d24fdf7. 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/TCAGW2313548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f25c6a1d3344d0a05cf760590cee154db2ed2aae252314987ad6008284b5b6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FXR352400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b68563840f3e8357b801d808b8efa83184cac77f0a64ef3b9abc3e41db090c. 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/FXR352500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a9e4fa9eb3b6fdf4113109b05043a7b3bc79f0d2a7b1252ddde5fb2d64b06b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FXR352500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31306295f570a5b6ba00e2300bb4de5e4c07946494dcabc683584de3bf12fa0. 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/FXR352500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17764ee3fb132303e807f736cfbbc6569c27b9dd62188e4c1bd5b4a4811faccf. 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/FXR352500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c08f0be66dbf3050ff1b4a5375e226cbaf087561c0f1e5553391ce9dbc5bc9d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FXR352500059.