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 0xea8437e3a22e412e399052f81f8248030b599b68524afb9cbb76649e36cf967c. 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/5cb5dd41-fbdd-4a13-878b-0dfda78f8cc4.json and https://artists.proofprofile.net/proofs/artist/5cb5dd41-fbdd-4a13-878b-0dfda78f8cc4.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 0xd32e3c0f50d1868df2938cf3f6f8016e31e70ec17ab7999a0803158d858106b0. 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/FR6V81410975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de295d5834250a8c89d73119e9bf6c28d7d9e7d3970dc112d3857a73cf28007. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR6V81410977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb67f446d29a49a01ce69a87e408b64d2041752947c47750ae620765d4dae2d3. 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/FR6V81410978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9d6c4709871619625325d3a3aeab66cfe6ec13c88e56d40f8cf503f69adc2. 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/FR2EI1300680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734c8aedb70f4eaff0534a326820ed7baf87cb6dbabe4a2bd122029b2656d8a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR2EI1300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36a95894a08052f6ea988bac22dacfe8dd2db575a1443b662e1085bc29d84f2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR2EI1300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad99039e5c0f9dd2d074a9a435b2375767a92494659dacbbd13ea1c8a9b930cd. 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/FR2EI1300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395af63a436a7990c3e3826748a62022c5216079293b0045480a3bd9e7f7952. 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/FR2EI1300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f178d7cc4faf4404ba982cdff31ca53fb5112016010c1ea5267cbd58b76b83. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR0U91700942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f47acfff1c2f186fef814aabdc4af2fdc4be07c18fd9c6a1191c69817d751eb. 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/FR0U91700944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136c14367d13707d9956890a82a491db210c3e3bca026a40be011acf09d8da29. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR0U91700946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf638509745e9d9e8856d36f13d24ac7ecae6c9e117c3bd014ffcca9393242fc. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FR9W11805781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a6d45f139daf4885d579ed9dca5de9942c3faa98821a2a9ef17cef9bec336. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11805783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aecec70ee8796b726940d292fbef7ce0630b55fec98dc7f6b4dc9d8715f870. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR9W11805787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc261e83b9534266e7b4415de40f77963f73548990a9d53380fad39e9ddcd35. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR9W11805780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc61164c9a0999124d1b5d17ecc4bde1d3c5abbc9a43f9ce4208930be8af57d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12042829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c79c3c6043ca46a1e93f294198af67ea252a6dfa978230351f6786051cdcc4. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/FR9W12224642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a25b3cd6642461c8150020b5b8c71df36b66831e117a32f29ab7f0d1ac6576b. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR9W12240786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6990e534ae555c6807421f7e26f06c2929d5a8d61ff1f9f2ff3479bce91f40. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR9W12312905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1259bed2ea781f20c2f5f8d17f067c128cd52a9328f3df29165cad6e5cff04. 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/FR9W12312908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b033966f0105e698c378b646894b70ce4f1da9af332505ec914f2df91096477. 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/FR9W12434025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5add2549551348132350e17b660cb13af194f3a37421db9ba22799eea98f08. 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/FRW572028027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a55d77c6ba578be5d8d5d1710dab6bf9540ff00277e49d6eba9025215b65971. 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/FR6V81879069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20da7ee607949e107b7f1e7742591d64b74daf8572d21816590fd1e2aa34c52. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR2EI1300700.