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 0x0f9c37f545fbf4249463702404789a6b5ec13ff57ba186896df1c8f0aa39c35d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/505a69c7-eba6-4fd4-b9aa-7a7ffddc84af.json and https://artists.proofprofile.net/proofs/artist/505a69c7-eba6-4fd4-b9aa-7a7ffddc84af.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 0xb76e50f83f9d71be0023908525f4c9815d2eabc1aa35f677a2c9b78683836c1d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:56Z), 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/TWCC31802658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f06b8c2d3d942b535412b681e91d09757a4ebd99a491a3c956d665e3fe45f. 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/TWCC31900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9898979121b224338026c6a0f0bf08a96ca7abedb8715887c2b377ce3e6abf7. 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/TWCC31900568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e69c79df1e097df3731ceee53f6282fd5a6df4bba999c4932744d74151cfc24. 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/TWCC31900569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe5ffc944af82b975ca4ca03fdcefce9f493107ec9c4f14fa5a2378fb8aab0. 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/TWCC31900570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0efcb079095881b9ea2b71a20dd1d1fcca2396de14a3beabcf01b269a9f781. 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/TWCC31900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f83c86c895bc05d2ae94c6fa8a32565935c10a918c8a53e53d061ce9c671710. 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/TWCC31900572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7900c492db08c3c866c0bab32c83b05e85f8572b8bc41dbe96adcf641aba523. 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/TWCC31900574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579090c123ee25b91e9714bd2ae45c045d46835a987a6d6afca3b53010130aa9. 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/TWCC31900575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23ce58694baf21d51ceda356d1144f263b2fb39afd1b6d01c011f055842a487. 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/TWCC31900576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2132fb1a196fe15547548a4ffe8f7f84716579430492682055dd057466e6f. 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/TWCC31900577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb12e6a9028879c0cadd0bd88dbb457cab8ac825b3225e38b476413370a9c86. 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/TWCC31900579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b62c2bb5a6ae93e61999fc57951c96166adc8311e57b521fd49bf758bdef6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWCC32108394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba0d153ae94b2e81241a69386386a75ea32ff5ee6f2e685ce0ded484132f23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWCC32108302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd661baf09fd5c6e02dcb78aab59359e03d3e1a768d6484dcbec8bce50475b6. 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/TWJ512200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1404911489b7fed2c2040426fbc05f0632e479e71004bd2acebbd7b74df3196. 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/TWCC32403791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ecc0ee526c0f018def3d380d4a2990d5764e94de2aae06b509c822e699ac2. 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/DGA052432626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93df3d368275eaa88b51781328377573cdf7da39e6578fc147aa2ea3c67165c. 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/DGA062455588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050395e0d50a7db75e93516274923a83ca5e93ee41eb49e82fe6acacfc9b55ba. 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/TWCC32001434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e2efd0d703936cd6ada48a379f5cf30f9f501eb041e559d24141d2e415757. 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/TWA471919007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deb4750181b80fc94fa7be159704adcb7e21eb963f81f8ecd191494ce9be923. 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/DGA072379786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bbd4da39ab2789c9b6d16c0b40ef8d74f78d58631c82d33640c9e4bc49c38d. 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/TWCC32000605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fee694cb2fea3078a380e7f2de4d1a5cbc9df4328b10310d912615f5d8a539. 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/FR96X2106646.