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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3499c5b32c1a4af799752249738bc753dea8c54b9d2a1e1f2a864d593f85a420. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8955907a-60c2-4b10-9eb4-eaa1b1d72ee4.json and https://artists.proofprofile.net/proofs/artist/8955907a-60c2-4b10-9eb4-eaa1b1d72ee4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822ab9420c3295d90e9eab627424b2873a5cf736451d0de894512100bfd31032. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRS182091256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bcd2766bb67f864f2786c5225b53ebcfd50e3bdf6baafe7563376043b3edae. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRS182091263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f104540450576970a4543a10a9477bd721464427857220e7f03862a4bd16a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR26V2022708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551bab6d50e97cd02314b175e9fb97e41d20eb5b37ec51176426048b10d5553d. 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/FR26V2022709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f594f989b4812a96193f4be451f4b7d292f6aa63072d0a11cf20cf095be9e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR26V2022710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8335fe8c99181046c7eb157482bad368d10cff20008fe5ab0185aa6b73a6796. 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/FR26V2022712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e4043ea515e824d2e539037d848081155cd9f0bd7bb96ba9cb3cd62969dfe6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR2X42387964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06568e267581bd4fafd5177b9c2f604b4712209e5b9e787f84dc9b4a016c05f. 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/FR2X42387963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96abc17a441d7c3fb7b5acdc321bbb0121d9b7ebfaacae0fd255379485deb92. 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/FRX452328804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f2d7ab570df81caaadf225eb74204001e3bc8b25a75ff4a99deb1583b09142. 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/FRX762392630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb0f8105bcce057d011f9851145d18459ec3dc6e8f880eed4a42804425ae29. 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/DGA0M2369968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81312a7aebbbd4e635ac8b03502393fa61f2df0ab69160693925f3479668385a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR2X42387967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3808ffb02393f3fbb223eb4b309d4542e8ef41ad9185386806b1f579958fbc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA062369502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2999ac4641c41ead515176b6fe76a641dca09f6250cf5dbab3c9df21e75b55e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FRX452196338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2232239d69b306144c5e10185ecb634d9a9dce5218a81e6676db405147fc8c. 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/FRX282342392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32164dcbc752d425e533cb0bd8bdb641521a12c11ee4d6732006b10f1e79845a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DGA082480585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbfcb7f84bfc318545734c77760deec526689ad4f3badc1a2639b8c47e784e1. 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/DGA0S2483096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3a0b3a160ff7a0a33ccae2590874173751b58d98e0c8351e1e61d08d653cd. 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/DGA0S2483097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c892f9be865396e933fc6cb421dd8d70307191f2316e2a9dee351cfd54d66d8. 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/DGA0S2483098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808653047d0f9a0b1307e7865b16991033120a06769b8006feded0809000e073. 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/DGA0S2483100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7df47c21e40d1f215d2866ed1f4d2e44ba341dc83bd527aec1695b4bbaaadfc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DGA0S2483101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7702a5885f94704480ae20ebab86ee8025ec1cb565d0e716ddb0dd69a5d1148. 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/DGA0S2483102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2277bcebaa1cc06c6f32f548d5aa8dc3b13e7aa63b6de3261f44d2d34511cd. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/DGA0L2440959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9191faf00c317eef023cce5981f2cff658fbdfd460f94f6a2fdc1ea2dff4ddd5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA072484526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32164dcbc752d425e533cb0bd8bdb641521a12c11ee4d6732006b10f1e79845a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA082480585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e26789d3408f8e2cbf211dfc3c9b6af42f355f78d1928f9d78e1ca120a0672. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0S2483103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c055337d7c134da15cebd43ebbdf67c9fd0f9ab8aa85536a9a5e24a20cc183. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DGA0S2483104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5157021f5740354f20f39e9ba1614923eb3edd11bdea1f22f392812a1e0e45. 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/DGA0S2483105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e9d0f2e066f07ee7fc6fdb946e06c82be763fded4b1f0637b5daee675751cd. 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/FR59R2443124.