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 0xec8f19788c45453038ce6f849997129bd05acb6bc08f066674fbffaa22715e4d. 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/b4f83717-05cb-4d8a-a8a1-b4c38d6ae8cb.json and https://artists.proofprofile.net/proofs/artist/b4f83717-05cb-4d8a-a8a1-b4c38d6ae8cb.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 0x18d49ba16091819b2da67672719857dd2e162d21d449eff18d6b413d12897c47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ022006404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dbf38df8703607747338516c4acc40154bfb43af718ae72f0c4e07b6e51972. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEQ022006406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba929cc10beff7e5059da5e3b4a242c2e2de5bedae268d43ff0d9a689aec4a28. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEQ022006408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee445629fc619a7485a3cb04aa72a09d7f153d833deb892af159331b9b2e643. 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/FR9W12130166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d64d9f69ea2e61a8efbca3311d2fca3528c3927abb059ee5cf0dee3f5d90df. 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/DELV42300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d64d9f69ea2e61a8efbca3311d2fca3528c3927abb059ee5cf0dee3f5d90df. 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/DELV42300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f3cc41d5f63ce9ad9b4ffd05f79aa798eb879aa8d97149a0339fde46a55d36. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:18:46Z), 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/DEQ022101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932cf76611b4023d4eda1ae310d3ec58b46345c91575f756bd6f0f3ac13ddad2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ022101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d311ceac706f9de43759bc40fe3914314205b7959a59e7f4d097a62d7d49648. 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/DEQ022101039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339f7e99f832885d3deba602b9e0a71ebfa13a7c6485143365f0d2faef0886a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FREIP2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ed7084f21fdab3f4e90d76514c06941b4e91faf9b5cf3b62be530825da94e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FREIP2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805758c7e6ddc678ae2aaaab390a00f1e1b8ba03c91b66398f1ef13857b9ef45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FREIP2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc449f2f29457a222e3f505c52da48b4352bdb22f3c721f57541af1d1869b6c8f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FREIP2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcd1fd5a923ba797e3532084e58712d426115c6f27ec8a4197df02e9ab32906. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:29:03Z), 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/FREIP2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa803cbb146033e4cb403067c21956af5f5b20275038dcc0144e3dafeedcf70a4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:27Z), 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/FREIP2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92154067dde50c23c3db68b450d6be191e7ebab98ca125539b21fa51698e8798. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FREIP2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604577ef3c72951b2681f4a6987f9f3d12666e6f10f2ae3c81421546b81b119. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FREIP2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f44e0f8c951f4b26e51afcbad5bf9290515af7a4a38a5073cd9e3f776f9777. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:39:50Z), 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/FREIP2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3279f8339adeabfc589f9657efb2caadfb877b1f1ae25c3f8f49755c372ab411. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FREIP2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce94884ab1c6c5e5bdd7e74e5e108d6e46d5916588f2495102b019e32fccfa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FREIP2500060.