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 0x3a522b0a73303b28546e70f57b533eaa79bab729d7f8de509583e15a73e3e28f. 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/812bf355-e1cf-4a1e-8115-00723750d6b6.json and https://artists.proofprofile.net/proofs/artist/812bf355-e1cf-4a1e-8115-00723750d6b6.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 0xa64354ea7b4d50203adfead82e1225d352230665f4661bef07004128b4565662. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIZ2470699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa839136cde30fe4f209b8f48e6f48e4be653228beedab4adc5326acf64158ce6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:58Z), 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/TCAJA2414667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fa255a8eafe6b6867fff13514fb2e3054fbf169cf0205602f10310774dc47a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJA2420787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7280c6fddb7c66b4a7e2625b78b20c01316fea96c8fba6b52d3ca25bac75ced. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJA2429757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef12a4609f0269dbfafbdcce6abe42761c16ab6b9eb550fe84b5d503ca9543ef. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/TCAJB2441629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28ce769f54a2e23a8372b67f9b357b63afbf595afb686f1e3b9aa243bcaeca0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:06:24Z), 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/TCAJA2448469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700569fb6a09af15c3930f5d0b40a4001e05bf9057385065b16a8d0578a40ad3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:20Z), 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/TCAJA2457020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9157b9f39e2651066b95d68483fd66f61dc83e7377a4aac4da4e3372e152c9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJA2469519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab28e4c567e56fe1883a773f724f578d6a45ce829c9804d6b241ad1ad0901b1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAJA2488928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc7b55de7e3ffb85a8dd6246923edd3c52729cac5e653d0f2217c3b0810e557. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAJB2494146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239cbf6dfeafc8dca2fa2d1dc6dcdb2f07ca4d70a9ad1f9bacd1aa7f64272251. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJB2421334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad6ae299fef31cacdcab5a2437ae2e08af5e57383ab278dabc9729f8a56bee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJB2431726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb28d3469aa1984be874c486bcc23e0d2c23e10580afb3e4a182555d9de05b7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAJB2441431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d272c2404e453ff4245711a3b9c243bb6a9192de565a95bab014a2f908291e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAJC2451149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6928a897c5462d43211ec420eb0faefd2302fc2d317d2aefa8274d6969525ca. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:47Z), 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/TCAJB2472766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378b1b59e41ed6041e95d996566d91e6566736d388d5d05d05e37208034f906e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJC2417148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5c5148ba7c9769144ffc20e8444110bd8e302140741d13440869febab7fa1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:38:08Z), 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/TCAJC2417175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a984c63eb446bd376978c060ced476c864fdcd6bf81ecdf1fa34ed110b220ea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJD2417180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbdb851efee7e30ff654a7f6781279118a118002c3e30796860083d52e2c73f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:35Z), 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/TCAJD2417172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e743b4f5ef7dce0bdd8749d1ca42f18f43057a172e09ee5ced60012dd7aad7f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAJC2417185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc6ca02c5c46c17fcdc44f50526fdddc61cccd5ced563a63b83b7d08786cce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJC2484893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed3001cc925214d17776bce3450c81fbcc89eeb3c3c490d13382d38181596fa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJC2484882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe061d2fed46d04f2c303258be9fd6ccd57638f264d788a1bff1bfc6b74bd4efb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAJC2484884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1250c35778c9c72f1c6fcdf481a89da3217778eeaef1293fcd3d466e45d1ef32. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJC2484903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0bdf6a2618cc962b7efe50d9e7d7df9d3d1ffd948acc65123924d22c9ed11d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJD2484886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703ad428445ebef20ea14e1af7ae12a7439bd607a57255e40937b4faacbb4c2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJC2484889.