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 0x8e601bfa2f59d8a7f01c5d045f9c33065434222596b03acdc81bbe144f2ff643. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cac8536e-7e38-481f-839a-15648029306e.json and https://artists.proofprofile.net/proofs/artist/cac8536e-7e38-481f-839a-15648029306e.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 0x0a2435501b9c7b17fce0fa8ae3669c41cf5d59559032f8f1e23420a8682b2e49. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY41971004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d2cdd75a641fc83aca4947a170bbfb870eaae3c8b56c6da056fda2e315479. 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/USHM91989274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019f6f26e16f46e98d894dfbce109c2ed4627b4fbcb2492dacc3285c75a41ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42051618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80cb3e4d4449d16b68487eb63d95ad12f40cd17e3374f3443537b3cc35e5a72. 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/USHM82044212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5058e9ba23912cdf30813c665440c19bd385a3d744b97c6d0b0a326ee904233b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USDY42163797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6431207aad811fc3abc54d93b1c10258b7785d95169b56327a5156be74b8f9f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USL4Q2155769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441353ca66fb7a7669a5f3867d0244498744825b546afed70b9961bdbb52d627. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:50:21Z), 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/USDY42231400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6fbc690411d124fd6a7900c5dece9a86f94f9902bee58e9e721cab6ccb66e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USHM22319516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1f1ed3d32e00168a47c1b3028290d549dca5d8cb6fb6b8705c6dad1b53d96. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USDY42473261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01da5c2c21d19d562c9228820ffad8093b6e14f3140bcc43378195f6a8c67e1. 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/USCGH2566186.