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 0x57b8760e9433c45e9909db8e6bfcc7428f4e2100f225a38d7f89d17c4a4fd5ab. 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/03a1c69c-aad9-4720-ba50-e9cb1b1465fd.json and https://artists.proofprofile.net/proofs/artist/03a1c69c-aad9-4720-ba50-e9cb1b1465fd.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 0x2f951568aaea406d2306369ced6a469fa38f2a5be2bcb263cb11479be777acbb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ1516973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055b92f7258b8bf98e22f0a41e066f07358e2a33e44591eb1beaec03d521c29e. 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/USCGJ1516974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb865794530a4e648524b4aa3043f92db48e61f2dd09e49ac9514c44e42134ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGJ1516975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0914d3a7958a49eea0eb6e83216766e01e00b4b4cd9f787a60c9af7787eedeb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ1516981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9814042a8d0bd8db600fb28329ccefba503e3319831b531a8cf360f580690d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41661058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cb3b2a74e3df05bbd17250fccdb7d073bd0787f1236acd8f2f8484ae470b3e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41661059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a0f635a8e0f769e456c32e1502259b13cf44513707aa31d6bc9b3e662dbe5e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:10Z), 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/USDY41661060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a614d8b04487a5a63979da321ab205cc89cb89e76867120d453dce0b7df08. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41661061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70989687bfddeec25df409bb4118ff2850068c81d26706f16e9bf373fd178cdd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:44Z), 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/USDY41661063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e13ee8964d1f66500c0191fede67988d62be49655878e4842502d89984519. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41661064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39ebfa5b5a0dd0f65c493d2737b490b19f9efc806cc5794cf9be9f2f72ab58b. 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/USDY41661066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452f7b1640bdec57f99177852f8dc0b833e582cded18444dbf90b738cc106cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41661067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58badb87d7f8b874f769b25bb95fa1f27518907b238e4b3e83b8b9e6c3b81201. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41661068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3617e04228e8e2b3b74577a5fea5a6745b267e571c8e7e4733d968acf8873d37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41661069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebc32a195a4de241e1bfcab38b1f0abcea64c5ccca146d831ea5f2f9dc13ced. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY41661070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089749b119394c95416c5f8898a91497b187ef485bdc636fe726d47cc27af049. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41870517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b16dfe847525fa36cefb4c7006361dd83a5f52d20920b0b7ba73f0fd7aab2a. 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/USCGJ1779597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570ad0e16de479dc0db629810d9efe47cf23f597e7e2db0c3e4ea1caa96de523. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41641611.