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 0xeff0584ec15eba4adc1e4b6f41c604919ba641a381ae60fdba73ccc9eaf40174. 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/0a13ee6a-011c-48e3-b1d7-80334c88aa96.json and https://artists.proofprofile.net/proofs/artist/0a13ee6a-011c-48e3-b1d7-80334c88aa96.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 0xc02f6256202c267d64e4a4d5422eed97e3b5a1c4c56b25dcdf00129de09a2db6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:48:31Z), 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/BRTAP2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2663ac469562b9c47313ebb4737d33b57a563c46ec84b1f5f7867c283b3b4cfe. 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/BRTAP2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45ab417316d9df846b4bce71e176ea2ac28f26bf1e97224054b47c0577fdc95. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BRTAP2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce00fbbbb70951b1b6d6a91787ca87b5eafd6aa2d8c93f670cb5d975fca87eb1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRTAP2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac03bfaaf261bf970b241195b4993dcf639d3f4ddfddf53dfad8f98bea324ef. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BRTAP2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8809f4a714cf04380addf3a6c277b6b94889da237e3aba6456f5e82fa3045464. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:09Z), 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/BRTAP2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffd164a082faf9c7f101c6516c0e87db8bc218f6425ee51b53d6a1309e07c6. 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/BRTAP2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ee5179948c8428a821bb74255bf7202b4bc31edbef6160f3d8a1b45cb13b2f. 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/BRMDM0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529b4ebc1b7a2ac0f14830541d5fa938bb374b9e54b31d92c16d0fa394f8d921. 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/BRMDM0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e99a2fdd2825dafc0721f990521dd1712bb9f2c85bda8f8caa7f51dcf1b2c22. 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/BRMDM0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf003c0416f6513697a393e1f921a761aa76a2fb27c46f5c3476bd2cd9fe37ddb. 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/BRMDM0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9649358d21f4d189a9168781a965565c60338e1818fb0850e8db218230272f9b. 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/BRMDM0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba92573ebc865085fdc0f9ee53329ae673bddadece921e556e723292cd812aef. 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/BRMDM0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b734c2eb03c3092fd912b0ea762d4e11a8cce6eba4329f8e13ebbf9547e26c5. 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/BRMDM0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e35aaf6c23d90043a31c47ddf965b32a69444204f8fccfa28903c71c4cfdc8. 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/BRMDM0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d02d60da5844ff5d129a0abdaa8028629aca1c9f282bae3e02668b0afdfc6. 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/BRMDM0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c2a94a15a484f72104e217e6a21c89365ce09bc162a7ee851cdfe787ca36d. 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/BRMDM0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4de3200469a67afbf233fc3b51aea6fa1d31ca840d89e13c16c2e9c2f85c84. 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/BRMDM0800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5986bef4c8bf44a6d1f6682c21c963306967274a0354c7d0ab02427689977d. 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/BRJLS1600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cc1fb126cbe204256d9b88d52c8cbff2932c38babe4390c32d13babf05f73. 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/BRJLS1000561.