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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b55b89d983e94601d3c5df2994536ca69ba5428ac210d8686d37ab98739a98f. 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/ec8e337e-1e5a-4317-8f73-f3234ab61e87.json and https://artists.proofprofile.net/proofs/artist/ec8e337e-1e5a-4317-8f73-f3234ab61e87.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef9ae1523b085ee714245b285772900cf9c54bc5025d5c08e4f7b7d0eaaabc4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USL4Q2013666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd12141f28b610383388d1523c17ca8292dbed04fa5aa4c6fb83ce8da7d1fbb. 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/USL4Q2013669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd7d6156d3f7e9a1011a0e337579d286fb9f08fd0e80c4230d5a34b773b6e03. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USL4Q2013672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3368d4ee65fee512fec0f1bdcf53c2125a257ae350ab6af8114111639840f56c. 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/USL4Q2027108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019905dc10cd3c57e9b9bab7343593d6f3462bfc0d6976434045e5bb9deaf51c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USL4Q2027295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fee7308f0b3d0b2fdf1b621f5b182b6672f5a0b416d6a577f993bfedd880844. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4Q2027298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7157aac32dbc6cd64fcae5e17340bc1828f9c9f95545fde5efd6eb732611782c. 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/USL4Q2027301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c00eb5d2fb98aaa816e09ebd625e07dcab063757adc920a11ad79f98ba95abe. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q2042757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b8c414067d4fcdc06bdd2cbd8964136b31344c29e7997ab8ccd0ccb511dd0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USL4Q2042758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e81ab6873e99b7f1820819b5f764f9817aa54ba507a5600fd3654b1dc00555. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q2042759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b18d134625b392fab0577a170bea85061223641a3c9e619b5bd709ff562cb8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USL4Q2042762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733abeb51c03fdbb47b6ab8507c0920d9558caa53a9925f874338df320c2ba4c. 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/USL4Q2042763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e3a0ed72845385ccb1e842f5d9e68b7c1e3db0fc098e75a8625f6ac705de2d. 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/USL4Q2042765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba63f60f11cdfba51dfe98b676ab03e734b9cfdd076635c7020b032251b32f. 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/USL4Q2042766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31fae2022bdb4150c2a30a7ee1222ba4a957cf1cb98049caf58b8e67a7ddfc1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USL4Q2042767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fddc1ea4a629d32b1296085e5de4a3c81f72efcfa434a6e4e29970d1bcfc72. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAEK1936635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac67de9dca7c9bd106fe65b11b91e2e70eeeb824dafcfe93e165d60a774f02a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAEK1936645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a6703b55d31fce1e9d5ee3ee308f23713c02758406bb71809f41cefc3d54ac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEK1936650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062470d6fad3cc9f541db08b082742f93fb82e54e5b07e68179b0282758f688b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEK1936651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ecac6a410f7df98b071bd3d6cfd6620159e4c19cac82459d26cf209fc48d6e. 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/TCAEK1936660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382c49a9979154f83a7c8178674f2207e1fad299e9d499f195fc26766ae8d7f3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAEK1936664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c205c49ae385115532e2f3fbfad7ac520ac053ef42ec01d888a08883457ff. 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/USHM92293071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630575fdd13fafd99b697ea1b6a692a5f2656777f87f1a9fe96c634128744ca1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USY242401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345fa4e791067f6cd27ce469555ec6a44aa59e53a39e1b174e9785755e2fb293. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USY242401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba45320af72215cf0b9b6bfc3d05b51291f9420d29016cf5ddd9a1a918d934. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USY242401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036abfb3f671c2caee3c8e30c80bf97a00c9b894e2cc12eaa2ed81bf2418919f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USY242401820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc95f20232b8ae771a53292b91262dfb4d266b5f8a79e90adaace4f11ba4c0. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USY242401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44d9dbdea7858f83440299fc01e13438d2ae91c8e2c1b69d61448e11cf9c1a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USY242401828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda57322acf61ea3fb2ebd78eb19bbbd0e89e3129c928de9b26a5cb944252782. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USY242401833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0126c3141a18cc9671db21eeb2331118fdbcd62bde2a076bc22480e1ce6429dc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USY242401834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784516b111a80ae44f1c21c9ce94690bf3707a79e2810eff7cfd94194ffdfd1f. 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/USCGJ2567929.