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 0x9ce7f72ec23f0cda031aaf5fc62b7e780f92128f455e8c51eba40ec21cdf28dd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b41659c0-1b20-488f-99e3-f56a5253b5fd.json and https://artists.proofprofile.net/proofs/artist/b41659c0-1b20-488f-99e3-f56a5253b5fd.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 0xeb50b1249caad5046874e02f5e8748cb96f8a444cd96106c7eec3792903d866a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAHP2332834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f75dde321885c807c7e9f0cf9042ce813ff4a99dc16cd5a37baba96350184d1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:46:59Z), 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/TCAHU2429269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e947fc8ecc66ef877417901a2abfa05ebd6699097315e5458847417a242ef8d. 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/TCAHU2453712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1985a935a92c4740c0b174cc9ab2f1b68c5ff034d67cc54e6265f132dc21311. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIH2441014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0c83bc6ab3f9bcef556c4c89eb82cd449b75fc0c37305a49261b1bf8f2866f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIJ2418477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea5b56196e793bb2c35b5b09b943799df10281b400eefa0ca7698aabff347a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIJ2466899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3508c084caf01e25872024443eab9f572eef404724ba41761f357431ea4f29. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIM2446859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e0b6b5f3ffa65ef69f12263c594927ad9bf1a068ba720cb8f0abff3617841. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIQ2499309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4143736feadac0fec661cfd63695db657da9e3613b83f483844373bb760eeae. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:26Z), 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/TCAIT2480470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca8827c3daea0f8f533adad45e47dac6fb313f2480088475d46b6c8f123ce7. 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/TCAJC2415095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f858ff02ae5dbaad084a10c99a7083389fa8a78e11588330effa66560c024. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJF2508664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526850302594fc5f64f1d1af15c200280e03e6c69a71feaf289ec6dd3b9b2190. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJF2570838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de0e0b10421ad6ea50ce2c33a7630f01187d162c0555ba9b2739be60abba387. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJM2590889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfa4923eeedb8cbd3456da69475d89341c30431989ec55d328f8922af8beadd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJR2537410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad355bf5c1514ca1d5dfdddac7c6fce6604f1c67a5ed98e1eee1af530ea546. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:30Z), 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/QT65W2532529.