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 0x06ca328064a6999b5b25f18295aa48543598ec5e0f85ef83e9472ae8e316cb1e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81a44382-410c-4d70-bad6-18ca33d96513.json and https://artists.proofprofile.net/proofs/artist/81a44382-410c-4d70-bad6-18ca33d96513.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 0x2ba5329436bb4c8943beddd1ebb241caedb275cd684a341427d3bbfb4bd34d7d. 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/QZDA42030248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1022f14462afebd740ead87035c69bfedf0907ec6668d80c848a6cd06f8a6. 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/CAEZP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0986599acf07403a34611eafde405dfda5daeded150207cf4b29f5c86a437a5. 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/CAEZP2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff6736e9e162dc793ecac4aa654ed53315c9f9bf644d1475a73dbcbfb2b9dbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAEZP2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375259908bc10c63441326e10f969e62cdddb2047c20b8ed2cb8479bc4620857. 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/CAEZP2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c41554ee24d67df41c9b173d10e96421944a6240c2c5b400740bca0ea542f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAEZP2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e584e07686645b6d87fdc04bd0b69ce3e42afb0ab4bd6d9b7b5aaea5d33bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAEZP2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a03247e0d576da48216fc95e8d63640f1414134da4b0487e7fb316c997b7e. 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/CAEZP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a03247e0d576da48216fc95e8d63640f1414134da4b0487e7fb316c997b7e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAEZP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9664f8f3620334bedbb08f7f8981f115b297a92e6662f7dbee49ecf908063388. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAEZP2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0c2d876147836bd869f4301c03e81d2b0368f628c71b33d531523fa05417f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAEZP1702101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674f297b6682a6c38acef6d80b7eb8bed823fed76c0f5215f90603f5143244f9. 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/CAEZP1702103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0893acaaccc0938fe34afdd4e11447a286de4c92ac4dab9fbd9235ccc36cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAEZP1701903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadca83befe96165e458049953b01c1909661ac1c4567142c9c46d033040a7711. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAEZP1701907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2b0690d038e6ec948c7751003df850d807cdb7b9b4fe4ccd6837c43f4092b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAEZP1701905.