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 0x2a3ebac44f595ad08ecbe48baf13c8a2f19cd6aedc1db1da1d4d16834fe1e6a8. 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/7a5d7296-5d6b-46a2-bcb5-01ba164d2685.json and https://artists.proofprofile.net/proofs/artist/7a5d7296-5d6b-46a2-bcb5-01ba164d2685.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 0xf5a00d0299c4330bfab43b2bd86e46e0dcad384c066f1db1a37cbe598bdd6ba0. 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/QZYFZ2445787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e50e33513e7d1e4c1dea7fd1e81b3949eaf305bf877b64d19d07c4faaa9a4. 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/BRC1S2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f57b1379a1c89e9a118fbb0a7b253f095c514e91b970a95ba431bfb8ac878f. 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/BXR0H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0838f6f6c4c25a81791021adb3c86641bda8dba05b3585e6c989ce8e941d84c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BRC1S2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903262ce014318b9426e0d11093f348e903ded61841be72b8d3aba6205d01648. 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/BRC1S1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff7a1835f7a417b55a8a167a8aa3e7797212499206504fb1a57c416417249a. 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/BRC1S1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5811602d36e961c5b435967369d936e43bc031378b566875b45ae48c4d0606b. 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/BRC1S2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f723a1ad5c9759c093261d363ba66f4808cff42a3c5aae7bb93acfbc75eca. 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/BRC1S2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfbc30fa242a721070b55785bffb90b0fa8854d1acb75a48c6a85b6bb08688b. 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/BRC1S1800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56b86ebcec991478ced91cbb387a8b33c807b7fc32c818e16df420b7debaf0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRC1S2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c38ca283b389bd2476848c6c832531c47be6b2e7b9d2ddfacc9232d594d49. 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/BRC1S2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddeda5bcfd75e3e2529e88aaddfd1e90dad322222c02ed19800be3cb401555c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRC1S2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937724cdd13c5dbda427f42ca42d84cbffaf70b79c8a4a4f3ddd73784c0814f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRC1S2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb5d791ce7441093320d569579ea616b409cff3295d199022cf8e03864c8762. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BXY7G2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb5d791ce7441093320d569579ea616b409cff3295d199022cf8e03864c8762. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXY7G2200012.