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 0x879b7621c4cd938e4179c9cfa632c190ad93febfcbdebb98d459c2523fec6507. 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/726c01dd-8cfd-4c3d-8bea-c9f647652acb.json and https://artists.proofprofile.net/proofs/artist/726c01dd-8cfd-4c3d-8bea-c9f647652acb.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 0xa28e9ba58992680fbfb8474c2f2e509824de54f62511cc637d76a672f23361e6. 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/BE2JB2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44974de0b9daaee5a5b6a7a5ee1de4dfc8adfc0a7a851f642d381f1a86a1e201. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BE2JB2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abe36994bb64bc497a74ca86e3d7447db94ed07c24e18685cb2343a2a3826f1. 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/BE2JB2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b557df726c500e0e00340b3be2a0e9ac290e4625177a656d18eae27ba18bb6. 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/BE2JB2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ce2655b23d3b88d4516ee4774295fc274254aae99536e00f1f40db2b211fb. 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/NL8SP2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718251e94aafb5f6db19c7846be52028c940845f69471effd74caf6d20252f50. 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/NL8RL2428591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d5b4ed51cdeae301f22de56ea1ffa521ec9550f7ac7f2d891c34377cdd507f. 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/NL8RL2414977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26777d6365f0620d3840bb286cc86ddc65a680e2acbb45fc8988410bc2751fdb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2400761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a000e7343d46e9a0f01b3d512a5e473ae94716cf2becbe05bee6fcda6d56d92. 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/QZNWX2349739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7734f63fded5b6b577fd0fd0a12b9934472a376f9a9f04ef784547b3197adb41. 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/QZHNC2274344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79618a65f48c94a88932bc760915654db1816a41f04aad55ae8df77949cc34eb. 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/QZHN82230668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c6785690bb43a8520ba5243121cb978d5a8ef0b768fb32b92ddf428d184fc8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22219714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b557df726c500e0e00340b3be2a0e9ac290e4625177a656d18eae27ba18bb6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BE2JB2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a85106739d4d45add9ae2a567ad0f8719efa51a202b1456c1d497ddf0ec99e0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BE7JY2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abe36994bb64bc497a74ca86e3d7447db94ed07c24e18685cb2343a2a3826f1. 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/BE2JB2000029.