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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c62e77ee02391f8db533c5113b87642ca9cfd3c8f93732de18e99715ff326ca. 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/928a9d74-11a7-47ea-9b99-8171e3edca0a.json and https://artists.proofprofile.net/proofs/artist/928a9d74-11a7-47ea-9b99-8171e3edca0a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa4546d8223a9d9b6224cb7f786da38aa886f5336021d27e9c7d8e5db913ea. 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/GBMZL1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bb79020da2c447f6c462226d2ce41750c474c76eb8ed28dfccd3932ca5c33d. 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/GBMZL1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dd0b295644e64aa6ef6af17ebbed7b66284ca0d751794b6406b04e9405bfd6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMZL1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d24d6b249a57eb60fa8c755634b2052c468e329e338bdca1478bc781e55f37. 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/GBMZL1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c6dd3fe278635f895c5b0e0e2893c1e893aad2fda326b0d0fc6f0992f46fc. 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/GBMZL1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac25f7f0597917da2a5fd7437afe2fe97bc7a57027df595e05fb5bae2ba5cf. 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/GBMZL1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266bd4fb1521d3488378d16fd6e4428faa8150ccd8f899e210a5dcd2e84bd67d. 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/GBMZL1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6fad71cbe9fa70f84e7d4a699885f4facddb05a59acd0461361be568b59865. 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/GBMZL1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66e64f5744aae4cf2cd0d96b40618ac9120bd19d3d88642563a17dfa5e869b9. 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/GBMZL1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6010800cfdec32111d51f73f4a458cb939ff016ea2fde10d361714aa5032a9. 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/GBMZL1300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d8b7f3008e0c0c13b9f5d620e6c6eb40e8dc0302f90214853599bdcbe97c84. 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/GBMZL1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23100e35ad87249c2f9d8a5492d2b15455c26509a5ba5a59f35680f22dac3c. 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/GBMZL1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d07355f021b4faed277b8bd1b99d394eabe68166fe39de781ca3b1081809c1. 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/GBMZL1300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52380b10639ab2c1194cf070548e6aaad704fed0fa8f67ffc7c1e50e2279668e. 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/GBMZL1300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc9306725626dfae4009ec67e6e24a30079e8714f08a0beb87ada12d66fb6ab. 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/GBMZL1300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390d7941447f0f3c6b11053729e1179f238c1daafe9b8f012407ff8503c14544. 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/GBMZL1300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df3b519bec7410e7369178b7df9115a087c547a67fc5a29a8245c4768cca981. 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/GBMZL1300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9176edae423165ac88ce96607bad09bd76782236d8ebbc445262ca4d506f6ef. 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/GBMZL1300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51508611918d47bc17f1d3dfb4e3d743c08b46f82c15a7f50372a16f3ab44058. 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/GBMZL1300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7198f58b6158749cd47e6bcb8d7e1ec9f2a47d2430c471ab73c88e28f368d8. 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/GBMZL1300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a1b1d16e313575a3859ef8a40ab5093c4b5f1319e0c767746b1e79789052a. 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/GBMZL1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83065c2ff9b2eec322620e19adbe740aac6d26dc1d39825771592dc39b67c9ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1524605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5391e051b220b57f45085dbe8369bee71e5fa2ac81c63ac49971d241826f34. 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/USA2P1524606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cfbcef14f9c17bc2521de4f97c6de5520e44fcc2694b446f2212648e68b44. 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/USA2P1524607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c24257a9b9b8910fbec9c7f87810b9ecaec42523341bc60658df502785894f. 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/USA2P1524608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87cd3bd14342bffc2db8dbd0320c470c1a6daf95ab8c6e16bf8ee391bf39a5. 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/USA2P1524609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda098fecc66372c23d46fe4c3ef35fa5099fe47a83ae8d8d0118028b00f206aa. 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/USA2P1524610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b9731c054ea3e32cadc4dc8d3bf00fe857f5a9f98eec5c572815926af8165f. 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/USA2P1524611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1058d9ac3e97d5df2dadfabd1c841248156225d060f7acfade73611fb63bab9. 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/USA2P1524612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b3ce31ea26a4a99690f75d57cbd0ac1aa44d0c4b54335303b5502b22af28c0. 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/USA2P1524613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904198491e68aa325761f9da6dc6b9972ff488b4ea54bd4c7b51e73caf33f23. 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/USA2P1524614.