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 0xf9110f45350d3fbb026cffc6c36b7f83464b78797825ad5cb2f55bdf151d8f8b. 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/e9d4d85e-ae17-4a5a-9f02-b0c979a2fb1a.json and https://artists.proofprofile.net/proofs/artist/e9d4d85e-ae17-4a5a-9f02-b0c979a2fb1a.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 0xfbbeeb72c223d8607e53a44b5ad7dc062f2bb97215516c42af68b7e5c5221854. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH0725459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ab3ae4dd8b1efdd8132ecceddb3a743b24b5f390ddb4231307f4eb3c86fec. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:27Z), 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/USCGH0725460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f3a3b74514babe9b3491b061a23ffef10f2dbd555493ac2604919ace7c7e0e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USCGH0725461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7bfa4a6027e9e8205c006e90c3247365a963a474215868f8232733f09ee97. 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/USCGH0725463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64b5b871d7d3a6a77e4c87b5a522d419a4b64ba7c8eebcafa122abb3b6e251. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGH0725464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb437e0ab0f0f56af0f1b9e8a1674b19d52091aa5227d19fd26467b75832c1cb6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:32Z), 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/USCGH0725465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c83f2f93665b00bd9b39dc1f3481ed83dcea43754307760a8a2648e515829. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBQNC0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a9371a404d70adf864455926459892f79f62c955125aa371dc30ce07c240ea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBQNC0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb203a8676a656df43c1b8f06d9714ca0db8edf15374d8d39b5a1ed9c7dfb6383. 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/GBQNC0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ceab31d42b6f7d2fb0705eba8cae1ecdd8d03acfb8bacbe39165b65ba8822. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CAN110800916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f9813d3d6dcdbfbcd7e41bfc5a63151220195a7a67c11b03e0bdd73ccee92. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/CAN110800917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5164dfb846acdb0bba7398dae536a7db9a3a13d4c5c5f3fde91f9a7370a6bb0. 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/CAN110800918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197612da971c92e73b1c8e04e879a1dc119748b453a58279ec6b43c3679e2ef. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAN110800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb650488be8c46afd88105d8890a1869032a2277129c117bbd9ee8725a375356. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAN110800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b4d0daf6891ed98936924e368eb14dea2f6b62c92db24bb2d41e68e1803f2e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:58:45Z), 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/CAN110900368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090a2a9375cf00533d3737f35b803eb63d3a64bf11f40c4c5c588785633e80cb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAN110900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a21625476fe34aa670ac301af53aac029de2072892c4a8f77c16c3b1cdf782. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:25Z), 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/CAN110900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d12bd7b97537f4f75923c911b8a863e76f0185d73e65674f75a81225df71d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAN110900372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb97afc6382cdf76f8ca85a550a2ce828b43b2bfd0bb5f2009212dfc1e58a7d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:41Z), 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/CAN111400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709917e705160592766eb3e01ae6a1fee53c7a0eac8fcf0a5a4fc3fd01ac47b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAN111400088.