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 0x14d4a26af2dc5f2d77812c540d70077166e438548c3df4b273384e2d3183bc82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e98e67c-516a-490c-a521-6e8dc3988724.json and https://artists.proofprofile.net/proofs/artist/5e98e67c-516a-490c-a521-6e8dc3988724.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 0xa5d536d8305d5ec468c1fcbc897e32fad8df0101b3d012b788dd8be26163588f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX4E52007758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a60d4258a67f3e5b27b1044ca8287faa06402ccf883f92392ea4ade84d206. 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/BX4E52007760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd734aea68c6c850ec723328c0ff7795aa1c8a0aa040e8b05010c65b595f8979b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BX4E52007762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b0d9d2b19eb1f043ba659accbb038a50f3b4b66f3e1057734eb75e56b057e0. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BX4E52007764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b906bba59509166915fc77f1d92f4c12d621ff18535ac4825475d01f5929d56. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX4E52007830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9658bb3b5affc7e87fe9dfa156d426d45170b4d343fd8a6e13cea0fa17f71a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX4E52007797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e87740033d5c90c9000f3aad189845317dd00d92a745caab8fb33fcc5ab4d5. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/BX4E52007800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b90764432ab72afe51b4680507a7f22db4d1cdd0cbb8982121f84b53674787c. 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/BX4E52007802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350ffcacaba143ee2881d151f3f6c6731976b761c06430c55f3d0459fb79a81. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BX4E52007803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6471bd2e3038f274994e477d6b3d5c361b747d27df5abd8f7a8d8cdef7a38e5a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BX4E52007776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe870ce7198dca2738f02c63a9a853a7c203496247d00469acf80c10a4bbc7752. 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/BX4E52007779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a0b3559ca47dfbf5319937c0ec7a494e7246642e3d1a8fba3a4a4556c0d70. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:03Z), 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/QZKDK2525299.