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 0x872100ac0f02b79dd19d2e9f96aaa031a115867af33490eff7a592feee5520df. 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/4c06a113-9967-4969-9572-0e9796b02652.json and https://artists.proofprofile.net/proofs/artist/4c06a113-9967-4969-9572-0e9796b02652.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 0xda5824c55bf591ee6587f53aa3c4e2f0317897c7cadc58bef7d3eb79047bb6d7. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNWS2036076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b6304fc926ae5bda38d6941ba238ba3d40fb7e99f0e398ec0f848777b14127. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:19Z), 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/QZNWS2081372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e535b23489cf5a0751b4429d6c5ba073c1dbff756c081a18e06ef35c924055f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWS2081370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dfe02de0fda2d939f9648399de8dd826342539e2814287c2b377754305e734. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:59Z), 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/QZNWS2082255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6cf5657476c5dddb9717e04d432584566bd03e345fab1aaa934e5f24193641. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:23:33Z), 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/QZNWX2127714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff031a91e0328e22cf3cf925ea97bab89e11202e54c000333802df166959692. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:58Z), 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/QZFZ72235651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ffccbfc63e8259ad91c08d487f15f6c02bd0a01cb8bbabe4b43e833187774d. 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/QZFZ72234216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4127b46607811b77ca9f2e9052a346c7ce1488e07c25df43b456271a465e1fb. 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/QZDA82260369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e98fabf749828892bc22807ee5d27082f2c2423d00712ca7a5567950e6000. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402101338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf582b87abf6f5e8f6091eeee7aed3639fe8ab85f038cc17baeed21cae8bb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6f0c87e7d73effd7e834e11a5213779ffc1633e96ced3faa7ec19da69c084. 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/PLV402101479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8b8246f77afd099a4bf8d6833539e9a2ebe442ca9b075b6ec5f7be645e4f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402201649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83d83bef9dbea3633bf0108c59a5ec0811b9724a43e6c2b29c077c405029cc. 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/PLV402401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f4639c9175a06cdd55cbdf565a919b0fd163bf27bfedaeafe7d04fd5d3c189. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402201516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83d83bef9dbea3633bf0108c59a5ec0811b9724a43e6c2b29c077c405029cc. 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/PLV402401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a79cb3f705dc1d4993edbc9608d07a920919e0852e252262dd4446edf5a912. 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/PLB382400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a79cb3f705dc1d4993edbc9608d07a920919e0852e252262dd4446edf5a912. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLB382400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa044f06a6033a3b330046b3d7ef0cea1863d917ec97f04aae457d574635232. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402000709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87509f0e04db185d610f3358e029fcb46f7fe4ba70cedb9a907e6a7dbe1320. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF242514534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87509f0e04db185d610f3358e029fcb46f7fe4ba70cedb9a907e6a7dbe1320. 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/PLF242514534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b819ee88907b5ba241355c9e3fe95dbaf8d516282d536ce00664ceccb2a89da. 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/PL2E52400012.