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 0x093c418ca948f1d9a36284155cc867fc7a1c5fe3aa7712f4aad8ad0b04d46373. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccfdf2c3-4ee4-4fee-8eb5-ed462b7b99f7.json and https://artists.proofprofile.net/proofs/artist/ccfdf2c3-4ee4-4fee-8eb5-ed462b7b99f7.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 0x48ab076bf9cd1237c68cb7f42b82cb39df1b82a4cb68ce4fb43df2bd7bd15a26. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:26Z), 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/QZTB42485150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d585a831f0d68d434a88af9d0dee9cf42ba8c79e9ba2936604090add43401. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:15Z), 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/QZFZ42526556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3278a65fcfd28adb738be750ff1b632f07f73083e0c7196e05439ffb8ae498. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:35Z), 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/QZFZ42529094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46afa846cb2614118dde60335e409eb5cfaf5037f5169a2deaf1c48a31f120f. 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/QZFZ42526557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c254cc17300375b43c7189e92645ac50226532df525b5a008f7cb4604a891. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ42529093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dec90121eb68e9fe42daf089b36de1203f4245f21ef362078f08bceda10afb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42524446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc22d0c705087e1f9d2eb113b9bb7f98a46c5bdd9e3b3e9968268c9c032e575b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ42526558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bff95144215e044b28905710faf8327596f1d3f057bd9ae0516f8f62c65e914. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ42529096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2cc4a0016c17fac61f245a4b7ed94fd765ecc79fbfd23bc8f05ec0746cacd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:59:55Z), 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/QZFZ62573680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cffc10f3754f81cbd34a0186c70fbc87c052299fa4e59f0daeccbf0599d8a5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:06Z), 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/QZFZ62575292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41c909e010dec9b38853648698e9cbf0c42f5df495583a0149dd94dd9cc4685. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62571861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eafe3a5bc8f4dd192fb7fb5009e0a8685e43acf56540f5f0f7231666e9abc6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ62573685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a7a687abd56979edf29a591060ffe24a8b9e0349c01ed13c14a6a4e631b3fb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB72572235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856a772aeda3b61616b5f100e2129e4c0a9639b2dc3d00195d950816f2ed151a. 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/QZTB72572273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab837f922e084629cdfd2f780ab8dbe9b1abdb7e7c53e7df81f541620e7b48fb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB72574358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d66d6f068cf87c4634cf9e514da46c31218cd87de7177ebc835666ea9720f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:16Z), 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/QZTB72570145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6254e6209007658135a96459c14326d26ce0ad6329af9f8d6a036b809ba43. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB72570113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f8dbd93188fd00d3b475b09aa05b1936466d7691a85a04f59e506f8aa11507. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFN2548979.