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 0x29a78398cf1cac4f78bfd74e511f598ad49138a848c78845f7481ebe5012f505. 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/e7e22e73-064b-4ad8-8f30-47d84443866e.json and https://artists.proofprofile.net/proofs/artist/e7e22e73-064b-4ad8-8f30-47d84443866e.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 0x97d1d92b6844e37f81ec44723f5357e2c397a92e123032d3e87860ef85f38d0a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAGO2255797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab447396d2b8a444f794cca9a85ead07e5b075b78a138fbe7209e02a6e39a4bc. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAGO2255802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecaddf9432dbdeed937e17e6c404f89b653e852c82fc4fd10f3aa249a7bced8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAGO2255806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494327f608656aaf3ee942af839e9649d824fa5384e4884137de0fe52b349604. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAGO2256019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe35e8d2d2f9432c74d0dd135cbc9704deb26bbe017d1e7c2a51cf1c23cc6658. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAGO2256877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b145a4d6ef1b26cb9fc5b8f04fc542b48801573bcb967407824baa92d4e783. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAGO2256884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4261a940b4df10aae613490bd6144d55765ca264949fb71f62e58221daf3630. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAGO2256886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46e277dc35fac9b3dda0b9d6105529eda7a0b596fd7a74a77f2dd9bb1ac893. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAGO2256893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640c40050b2ee0503fe0c8888d35bdc06f2b6e605d178d958d265c65b98962d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAGO2256910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04566f4e8493198b421337182f23e2a73c9dba2992620fac72762dcf4a3a9504. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAGO2256927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3715a6ebbc9c6e6f45046e9d519c4a28ee6f50159448dd22cc19d150b398234. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAGO2256928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3d20b914bcadef2be651c41a6f60e60bd0eea0154e122e809cce67141742d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGQ2275155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfb5c0477390a9da0902d8e31479802b7b85c6826338505c266082eceeb6817. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGQ2275159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ad98d9a0231627a1844482b2bf59dcf2428969b46b2f1d27167346d663611. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAGQ2275165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ad01b0a355ae98a6bab584992d0f4ab7a78be6a2b484d37cd9a06e1e44f90. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGQ2275168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c31ebefa57a022ddf3bbe769ebdabdef09677ecf6620096da65f5dc7c87ddc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGQ2275169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c31b2f0d284518d6f886dc984bc3bd3458ace1a0d9a6f4b3b15ccfa6d0eb9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAGQ2275173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3575e2c807f79eb7f162c1362f49c802a22321f467af96b0c81b5f70a6f4dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAGQ2275175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83534a7fe32990cb93d72215891d63ddce255d713a25f5516a8cc438006966e8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGQ2275180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13c89e253bbfe9b33a0f1da351a3fb6b921398456183c401d3728a1a3a56a3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAGQ2275187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627885b102efdfece1c8337385c4cce841bdc81b25929e6c6c3c4e96c47d4f38. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAGQ2275216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6b25585ec28570005432e1998b1b36aea0e56b700e3c7868acddadb3238201. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGQ2275219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73804721523a0ecea08798c79f0c93d237578c29b50f1c5763a4dd85fde3de30. 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/TCAGQ2275221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861506af301ae9f935cc6e085c4fa04d77b3b8f8e815e3243a48297bad54b066. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAGQ2275232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131aa0c69523b9ce0703d37d611406c5a2ab6004c38eefa638dcf6d7ed9c4a8c. 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/TCAGQ2275234.