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 0x70c696c4e29b5f22b095ce1fe82cbe763918fb88bba1b3eefd596476883aa678. 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/8550ab2f-0fc2-4a8c-b41b-64d7d53b879d.json and https://artists.proofprofile.net/proofs/artist/8550ab2f-0fc2-4a8c-b41b-64d7d53b879d.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 0x644f98cddcdbc39870b3278434a7f4f0645169275269247ad7645eefad07a83b. 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/QZDA41896744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe346fc309190da25e1a8563a7bc9be0239ca9867dd76457b94c2372bef8b04. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2216110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9cf759b48ea9ddc7a420227a468c88a34fbf8c2ada976b51dff11a8d0bb97. 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/CA5KR2259404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e9c2d9b0cdb2692d57402c65e5d800b29f00084b2825e91ee01edaef7d73a. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCAGQ2299414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445f21bceedc1791ce5319080340450e17d436d128ca74fe5d82438b9ca2cd07. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42314620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cdd97ba44b64083f6f29e625e2797decae6610acc84be349b1a2f8809ee72e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ42314621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea132712cfc692d82f578ab6be25f20eabaaab60d14125c2afc46e4c99863ec1. 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/QZFZ42314622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d34f8676a03cae519c4976d4a8bb5f0a6c7c805e798f8e6143b1956ff97b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42314623.
Switch (with Nat James) [OG Nixin Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e0bd01c4b7492878e5e213afa6389d139ccd91da85b5a902b2592fdb53e615. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/CA5KR2393921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af942ba0ca7c3a0c9f13d1efb63560c05beb43dae832bcee740bbf05f4ebe3. 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/QZWFQ2312246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfce61a88f396ae23fb4d18a16098cfa7d48ad5afdf0f7226f67828963ac1f6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CA5KR2430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ea2fce227642f144eafc5292d37cb52c8760feddab896a72dcd92280a5e69. 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/CA5KR1964798.
Switch (with Nat James) - OG Nixin Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fe2110cc322bc65d5d11c725fbad2ad6affd35cbfc63eca0af84fcef61e4e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDM32353413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2943d2acb7a86e8621d777a67f7121328485a4f4021c26f57d81ae91210ca40. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2437474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe346fc309190da25e1a8563a7bc9be0239ca9867dd76457b94c2372bef8b04. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA5KR2216110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a830a607d74e0886405cf86121ceaed15ab4e5eb1d87352f61b996e1c54b013. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDM32029906.