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 0xf0c24d2fa8e3fc0dea8a4f2833ef960c4630a76d8f5c1f05ddecb51b60bc224f. 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/1eb48c8a-20ff-47dc-8403-31e1d57f7a71.json and https://artists.proofprofile.net/proofs/artist/1eb48c8a-20ff-47dc-8403-31e1d57f7a71.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 0x6a69d780287b267feebcb6318849d54c54bc85e8e16bb0baf9619729ecdb9902. 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/ROMTR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c3f4ac87fd7ebc3b03f1f6577ea5a5e77cdc51b911b001c89b9f5595e5970b. 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/QZK6L2187170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be16d4632c47599535d6c072363eeec8d8593c2520e26d9a9aa192a4fffcdcc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA052456361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e58ee09e8e0e1fdbfe4c8e307b99b11b42c529e4191b6b0b44ed19cd9722896. 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/QZK6G2232402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8cdd2538dad116a6cb1ba669e6e9428065e013d4c71119bfaeae89848ee602. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ROCRP2005412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa0aac3974cc7e89b91a5f512295dd492c281e9b48bdac242733598d6ae535. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2204984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d82d0e76bc6c1b8b14c5b29f9aa4356eeb11b4a3f5c0de1db208e0e0709ede. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872478281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14550980cf4a520ef493e8e7e9ed07c8d8808927c4fe390762ed9620ca90a7a3. 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/FRX872478282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9e3831cb4e7d831165c235868fecb53ed20ed7c730ec5d232f0b334478e6c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872478283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a37777cd7eeca355053da2ccfd57a2dd7a5a567e36cec2911abab06beb2ea2. 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/FRX872478284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb924a9d73136fc790a2026596a9f8dee7457c48a703d079e8e45fcf9436be. 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/FRX872478285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb836ad80eae3d5e4a85f30aaa74f84d455050d044b52c7023bddb5eae2f2330. 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/FRX872478286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d6ec60e2632ae2399351c936d45e10d87cb65c63f6945694a7513af54f224. 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/FRX872478287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa164fb71859b47955c7f83ed857753a851a499e50d0fd848accc5af44550ff9a. 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/FRX872478288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b7bdb81bbe7213de9c9d331a03270b175945b52ee51e3bb8ff1e20b8727f96. 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/FRX872478289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180452539a5534d764d402adc3180a448a0bde5784b05a2dd8759cc76ba9a490. 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/FRX872478290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d496bd76a46e3bd578c52de6cf3c861048c0a6185e5225cc72f1e4084715284. 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/FRX872478291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f8514a1f1a883f3d988d0f0b0473543bd33ef102a1f0eaacb565523adaece. 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/FRX872478292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc83ef11dff1258b3ebe9020176fd2b0d6c0744806ca2d4cdb3751b78ad05283. 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/FRX872478293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364e6f68bd0cf153e1a15ec4996050267e552ea86c63cd827513c0b9487d93cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872478294.