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 0x6a405fd6410bb03ba840a379ac9033a8530716970c7525340fcc880095400dc9. 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/83265197-33ad-4aaa-8cee-abf3b63f421f.json and https://artists.proofprofile.net/proofs/artist/83265197-33ad-4aaa-8cee-abf3b63f421f.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 0x0e8746d9d7fb5bb9549bead891595dced9efe8aef18fd506c93d3b1a25cbb611. 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/NOFFM2357010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaec343d0699f1f873eafffbaba3c5fbce426a9c452718d54713470d02aae62. 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/NOFFM2314010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951e9b426f5925bacd986384aec9c2f48cc064aec198fdd1f6498a2b49bb6fd. 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/NOFFM2357020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7993bc4185a336ffa9681996f87f0ecb22e57da0e111e244c082f85f361dff. 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/NOFFM2357030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c571746666d9b3d680649eecb4be0a824bfe395b99e5cdb3fe484f8b17b2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOFFM2340010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9428d1943bd9e324efa42bd35f587a7a018ebde924f69db88d965e0027bea9a. 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/NOFFM2357040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f56ddf4ffc300c3c676eab5792bfbbbc77f3e3599a0e74193d0b626dd27dc6. 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/NOFFM2357050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69533c9280d4481ff2dd14bd9a3cda1f7b3636655db92458cfe8c70574ee0086. 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/NOFFM2326010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1235d03d21735414e4c81db369638db37311755e93bff93313d5e801b1f27. 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/NOFFM2245010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7641b0e0d3d0d12b0f0cc634e772b5e68ff1d8df68e6dea294697cb0b62ffb. 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/NOFFM2457010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd07c2d57b70f3fe2fd7748487deb60ac09053c69fc17211ad8c940594fc908. 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/NOFFM2453010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9a98d9b973aafb07bd27b8a74d250ddb474bcca5f8678f95fc82f36935025. 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/NOFFM2423010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc78869e8dd95e3cc05ee6bc23604e2e40ab58b08a99e4760d30692e878c01. 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/NOFFM2415010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c571746666d9b3d680649eecb4be0a824bfe395b99e5cdb3fe484f8b17b2e. 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/NOFFM2340010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69533c9280d4481ff2dd14bd9a3cda1f7b3636655db92458cfe8c70574ee0086. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOFFM2326010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaec343d0699f1f873eafffbaba3c5fbce426a9c452718d54713470d02aae62. 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/NOFFM2314010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1235d03d21735414e4c81db369638db37311755e93bff93313d5e801b1f27. 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/NOFFM2245010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669276997538794f05663284b5ed7707021290cc3512736e24cfa898a83d87ee. 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/NOFFM2232010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289ccf99fcdead80983528339966dbfeca87f81657c7f66f6c6505f4a1a6a099. 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/NOFFM2221010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453d5c71570b2679748480a6613dba15497123fe8fea85ff43d886fcd3446c6c. 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/NOFFM2179010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115ffa3d3c94d1012707b72b5370e354654c149fbf3503614d3703b41517e80c. 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/NOFFM2180010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929c33d28cf35f61e561ca50998bcd645cbf6d9f6e99348c81b3b8617a68e326. 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/NOFFM2111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11942304e0cacfd14dc95b0f40a395e714f875098cdecd66b681a9c544f75ee. 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/NOFFM2047010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dcacdaceb6eb8e5f0314cb0860848038471618fa43aadab7c18a31ed9306f5. 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/NOFFM2047020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbec01e23e2c1b796ca8cb0e10c1e96b50b2ad75fb6f7c5299768d22b9801130. 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/NOFFM2040010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbec01e23e2c1b796ca8cb0e10c1e96b50b2ad75fb6f7c5299768d22b9801130. 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/NOFFM2040010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49918033e33ac3f019fe5bb2c60216b3ef792415c4413e4360f848fb52b2e708. 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/NOFFM2461010.