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 0xc9690248d50aee64b618dbc40f915bdce1a868736e5ca138694caab2eb77733b. 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/0f5e6d12-ff17-418d-995b-67f629f0aa63.json and https://artists.proofprofile.net/proofs/artist/0f5e6d12-ff17-418d-995b-67f629f0aa63.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 0xc6e2b20afa93e73613ddc216c5ea85482077e827845808c1ee74acc1b160010c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:34Z), 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/TCAIT2489504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b21ec50f320aa4523f7971c8528fbe6a1d37e7701c337dd0619eb3b98462c0d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFT2185573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41af7af40dcfa130889883b0addec837885a03ea192ca41dded2675bf9b55afb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAFN2195908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa84f99aee16fbc29820d137c45f2dd0c83498efa7a623dac134a946672bf35. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAGE2248787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0405f25b215877bda69f82ad67073f0dfb58efb6ae1319a4dd24b53b064f0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAFH2032550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a39f56762ea8ed087d8544f99d7b5f5ab166db549ab4a04e6f7aa91b49114. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAFB2047506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55add8b3a2a56a29bec7c6e1e4805d62b4379ada723ad6bb9e3abdd6ecbb526c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAEK1941240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85df1e4acf0450ab3b4710a999218ed38a29e5e30bfcc66a06eb31b5cf38a0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEK1941230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0929571f1dfc7460ca41219bc2174f3ffec4621bdcb56482b1114f6da535e83. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAGN2273797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15564f4772b0b0604271bb1447d01e3130887e5d4ba2d975924d6b5b54e097b1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGW2321192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aa158328abe79e63180ae2afdf550a01f89267c788f6a675614ec5dd07dcbe. 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/TCAHJ2302023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffa71d4ec511a462c84fc50669bed50fab54a26813a3e2ddefc823f1e54b609. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHO2366459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15bb552591c91a3277f8b6cab4729839ebf5624f40c3146c37447696ecb6a7f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIJ2402807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c5b43feafc0c740d8b05c5f8e134966662d3afbb851913690be8bc6135110. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJO2509628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b91cecc56989c4b33fe1fd225e5061419dcf5570db78616243810275b3dad5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:48:38Z), 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/TCAJS2512982.