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 0x82e64f87e1bf5439b6cc05fa2dd203f2ab479444760bccfeebfcaa0e2ada6b89. 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/533ab740-42a3-4cc0-8949-5b71660ca6f7.json and https://artists.proofprofile.net/proofs/artist/533ab740-42a3-4cc0-8949-5b71660ca6f7.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 0xaa67228a7cd6c208368c5ec52dfa5bbb9ebdb621aaeac846dffa783edc857721. 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/KRMIM2420796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256fb0a97931deea1ad01cb30133ebe07af111924ce9d350996fc0bde2705ef. 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/KRMIM2420797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5f5d759d77ae5cee860dbc72f207aebdba2f559c13bdb4c89cb086d878139f. 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/KRMIM2420798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4743211445c2349e7435ea7834a66f5a0d1ba5a063721b066cb9aa1cfe2d54. 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/KRMIM2420799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06d45bef28c3356e1996b46af424d7c20c72fa6214a3b2f37d8086b3a988aa. 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/KRMIM2366244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd00c028a3d606bfcb63baf06e53c5a298a883e04a0c98b9527d7909c0fd74c. 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/KRNAR2235717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db930ceb3101e406071beab8ed73b8c96453b2d595a8cd2030a002cb789334. 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/KRNAR2207820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c20b8e55f066393c89beb52f689d6529e5e5bd5aa7498ddc9420c01cb031e5. 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/KRNAR2204232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c93d921c3f0303de95adb376fb00e0db897d99958649eec7a56a450a8117e3. 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/KRMIM2250565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9770968d68b05c4534ffa9e1989a69b99455f6f7dbe537e33f610838b6a5d9bd. 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/KRMIM2223659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061fb4adf25e3514839ee3a24ee061c32085f6fd2aa85eadff04882240523c21. 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/KRMIM2217818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0848e308e5edc444c87d3a88969535ce2e6e775a5b5f8ad523f6c81e3fc66f3. 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/KRMIM2204487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5519c95e27af1b3dd9acfc096050ace4a748377511b5a91e57a7a8064f23e858. 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/KRMIM2204488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a4f4d3e8179d1d062faec1a6313601fa9a640cc65f912b949d099f85bd849. 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/KRMIM2204489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad22f8fefe2c5c8f2ce9396d4ae36c007822c13175cf3130e8d7e61bcc9638a. 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/KRMIM2204490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0767ece21902b7ac2b6ffa22ce801ebdbcc19092ac0e90dc0a89f7ad6573745c. 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/KRMIM2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3270da925cf4b87c30cd278e2e00f0fab5e9a0ae5fbf2dc91a495252acdf942. 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/KRMIM2127880.