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 0x283f050b3b1da59af75c5f02eee57904ad0310147a627eb1f40833fc9d792829. 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/c7e586f3-d355-4b95-b10b-94e3dab4744a.json and https://artists.proofprofile.net/proofs/artist/c7e586f3-d355-4b95-b10b-94e3dab4744a.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 0x0552731368e5b68733ef490c6f213915e304de896af2ade93adceb0f21356825. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:56Z), 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/TCADI1705538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8043229f515b475366620b1ba01a1d52e4a6f350351758fa27b5b2f3bc12256. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:16Z), 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/USLGZ1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939819f135fe4da38b7c60661ff5e8eb7ae55ac10f33d0b8a1fd5dd600f9c2fb. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USLGZ1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f35ca0697536207dca3cdb1dc47666f1e42dc723fa606cbb4d074d18e57a3b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLGZ2000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81655d78529844c1e265dca86320a063d8f8b0e7d4d712437f8269a87eba4b96. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:29Z), 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/USLGZ2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7e17d7b8fcde7894dee25456c0bec3bcd82f0c648f001e489817ec4fd27bc7. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/USLGZ2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5759470b26107a53ab2b4618943a04bb7f7105cbd1410d0ab213c17e045d403. 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/USLGZ2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd9a46e552db61449f82ec138a69c467559c1e3fd2ccf6dd8219ee538bd272. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:19Z), 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/USLGZ2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e19780e1c894fa5432b5d7bfa404f578f68e1dbbf6d043c66d94b50c01cce5. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USLGZ2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6eed094bdfa3e5d0f4488f9cd24c7521adcba4fb74b2a97403f5eb9d6242db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:36:51Z), 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/QMFME2362219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1b83bc5259a668db0708c60f815ad09d55c857dd0e0e1eeceb198392508680. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QM4TW2452523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6eed094bdfa3e5d0f4488f9cd24c7521adcba4fb74b2a97403f5eb9d6242db. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFME2362219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74413dea313be187bb4f06c76ae44d2820740009355a7bd0bd019c29dd5292b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TW2452509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f23b579e1e003f3401f772f39df0e2fd2609135a4ff78b06efa77986f9ff7c. 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/QM4TW2452510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6491d62746a937b09abad2d3b67ea21c50e2ae706cd287d47547cc1a8a0cbf2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TW2452512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3310af53fd843221924ca49c09748d77541a9f27780afb1d8cc09a98630af1c2. 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/QM4TW2452513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437bd00a3a385dd1cc5cc2c8ffd374207eac568fad91b2a307a90f0eb707fb5e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:28Z), 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/QM4TW2450226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b814e59a0374df5e2dbc68e9d16db334a6b48066d57e0f051b595321b7ba4fc. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QMFMG2360302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487ee44e621a5d788bfdd37a83190fe110a5526cc6c42aa6aa841f107d7096b. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM4TW2452514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af475a7c6a73866b94011d04f68d88341642c0bdf13148c93d741661df163f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM4TW2452516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9447accf5ef52099daf2a33706533f0c58c8c55ef25861feff748fe793e3c8. 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/QM4TW2452517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a7911b3e2337515a531f075f1cac5480a65149669b2019d0d246d6066e5cf. 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/QM4TW2452518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9380b0b1b95b5de939991e9fd814ea31fb6960282d02daa49419b55885332159. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:31Z), 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/QM4TW2452520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54112b22de8f3a5c7bcc4863f66e78aa682f4ee9ddbb8db693860bd0b7fce6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2452521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0488f7f50f2d0e406ce5e792b68e60f23ec747edd9cc3e9038403e350fddd411. 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/QMBZ92455630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd99b9318657ff49a304a44b85cae8aae5df03dce1cff0585e0120f50888a5f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBCFB2000059.