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 0xfbac6c6295ff2eaa10e55ead39072a4a09ec0197fb891d061b9b59da22aaff49. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee8203a0-976b-401e-a4dd-952125987462.json and https://artists.proofprofile.net/proofs/artist/ee8203a0-976b-401e-a4dd-952125987462.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 0x9509a072a83a4e6af95f2b4c7492bbe83a39c6c37dc0df064961431bedb6f34b. 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/CA5KR1903417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936a6494d69d985006af7bddb4c0022152d5cf83e691098b90fd48dce9891b66. 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/CA5KR1903420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c58e7e6fb6779e59485de49050f3fcfb9fb6985f76c5e8e5d87321e27c5a5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UK94R1400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b9f4b9c0f5efdf72cd326468ce86c1cb420718872cae6ae01f9e549fb8b72. 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/UK94R1400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd2d628ed3484abf272ce0dc024b890f384113fa2ec0bc5f95b5914095dff42. 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/UK94R1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430696b23616be039db7f6068e0efe4fda7e5bb17c135ba2c13511b044c93f7a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UK94R1400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d9bc56b08fcfdc47d14172eb67f1bf499d62803d96aa34dcb45378479e4de. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UK94R1400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1c5e686181e880dfcae34bd52d73ba53a587204e882dff3114d4676169384. 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/UK94R1400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30aa062ae4726c71f6332845fc5864962320f72cdfa744a78b026c5c75b50dd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UK94R1400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4932d45f4c68629b2ca34ca0b749d2bfb39dd975c00c9123e09eb92cd497e3d9. 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/UK94R1400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805dc45c449ddfa8d9bfa24165611c90243897c77f2470e1cf64c39de927814d. 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/UK94R1400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02cd6ed63ef667e53d2c5b3f5ad372e5b581ce3ffc0df23883de310ea7317a1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UK94R1400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3405a8934190bde91279ac8fa4e6f9461e8f8eae7b5f587f786b20f364167b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UK94R1400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a511f962a17d983bb51f4d3bb05bf4a5f7549a042d4c21d11add2017d45273. 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/UK94R1400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a8403381d8d5f7342098687cbc2cdfd4e69863bb36cfd374dc747f06894bf7. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZ53Z2400175.