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 0xc3eb63841291b6dde0ed0f79854db710751283032a7061671de870692152cb37. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c02bea4-657f-4291-b245-f16311dc2681.json and https://artists.proofprofile.net/proofs/artist/9c02bea4-657f-4291-b245-f16311dc2681.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 0x59f57125933058a4dbec69a9a3179ce99be936df04f20f2c532aea824b4536f4. 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/TR9522100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ee8d056762ef22b88f99f1ac2bda46ced592136d3644321a11c6ea01806e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TR0532516048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa455e9f594b4fae22bcbe2b87e2f2db7af9fa0da2999e2701afc46dc1958f991. 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/QMBZ92353959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb57542957ff1cdc47d96e72607a71801bd3cd02f5955d4207d8fa89e6d3e658. 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/QM4TW2221990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a4467c86d7752e325fc747db439350eaaa948b7d918594a0dd8304064ebb4. 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/QM4TW2126601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80aa2df81c81d6503b550703b19cc61a84c86197008c53c20ccacf536d90063. 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/QMBZ92056687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf561514ec24b8ab4bf44e18a3bcfe5930c5e254828001e1cd9dcc0c220fc8262. 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/QM4TX2060890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b5eef2a8153f0edc26ab59531d573b2069f6ceefdd9f64b045eaf7394a111. 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/QMBZ91948129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e92445aff87c641d021fe2fd196b94f990641d4dc175c200da779b93bca36f. 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/QMBZ91913066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5db614746e02f91ba8d89792ef4c24ff16011855a3a7d65fdc164544acf855. 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/QMBZ91913151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201eb3045d5a5fd47e7b47f1edbb8514642ea3c9d5cc519b5c9fb271cd45303c. 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/QMFMG2374045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb48cb9afa7a013633affbd1af5280b958f38483e616c2dfeaae3dbc73b75b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ2425477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201eb3045d5a5fd47e7b47f1edbb8514642ea3c9d5cc519b5c9fb271cd45303c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMG2374045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4503771ab79ed83bc3d86061758d3427bb2353cbb10342fb79c104104d695c16. 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/QM6MZ2425461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4922447437967fe23114eda2cd68840926c93d137ef65d996db10f1440cb6051. 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/QM6MZ2425466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0f3b5bf12ad9d0c57347666c55dae20bd512350c3b1de44d8fc5bf23315b0. 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/QM4TX2425794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402f58d85b8e16370c69a045014c683513088e0bdb783991511f26c01bd6b52. 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/QM4TW2446581.