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 0xb8ac2d572e4158e40a25ecc9e32ba672ef50e3a50a134e5b5dd730b652c69094. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6aec3ee-e358-449a-a9b9-625517b10d0f.json and https://artists.proofprofile.net/proofs/artist/f6aec3ee-e358-449a-a9b9-625517b10d0f.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 0x8ee509c9329febdc31548aac2f9ab91f8da641ff3d605d7cc97f4e26942e2fc2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:03Z), 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/DEWM92111476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35306121a085bba056b493ff096fcdf5826bb81a6e40f71c2510b7b6cdd66ae0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:53Z), 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/DEWM92111477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f728b0340662f26a05dc12d185f5ae58f3fee56888bc8115afca9f46fb2e5c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:24:00Z), 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/DEWM92111478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf69bdf25bd27cfd4aff3acdd03fee29a51c6c66c713f0e25647c6e5316848d. 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/DEWM92111480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7865f8cfb63251fb1a5d8f5184db69e384bfff1c2a4c7543cb7e0a5e95d0cc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:41:10Z), 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/DEWM92111481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f604fce8612453f8f57c0282e61f6d41e102a9acb921db6b7727aaacba5c427. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385325cff7b33464cb4d1f82f7a3798aecb7020b0aa36b5f3729b284560d9a41. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:20:33Z), 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/DEWM92111483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc71809c04ffb34d298e091dd05395e35663e28b49e0b5d61900c6a45c7347. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:04:29Z), 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/DEWM92111484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21deb0d9b5b36a4d2aaaa9466cda3cae258c42fda83dc866ef1fc2e29ae8660a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DEWM92111485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf5a56d65c005b92ea77bdfb38f5eaf3edce6c683db5339878042ef2daec38. 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/DEWM92111487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbaae3f1dcb4c2e53a9dcdddcc6f5dd6e76a1a88ab7008df914f67fddd7eb2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:20:50Z), 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/DEWM92111488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817546b07ebdc7006a35f237c6cb72e15150747954f2b3ce1216726f230a95d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEWM92111489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e48e37bb625b726208ded1330c21af6ed0042a8a09f4eccf4d088611be759. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/DEWM92111490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076800c29d911d9a0ec1ffc3c33553fd71449f00bb5c131728a3ae9bd438c953. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEWM92111493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92188a2a076874849f14a10a7016de68eeaabfb10d83ab665a9e41c50f8f679d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99629f4f8e097a1d2b6731f27ad18fe34d1aec5374b55bf03f6955db98463833. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:00:48Z), 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/DEWM92111495.