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 0xdecab04f519fa8e9f4a470f0f5863ac8688294e257c097b08774429c3e4cec2b. 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/b8969677-5143-49a3-9357-75a4a1f40de3.json and https://artists.proofprofile.net/proofs/artist/b8969677-5143-49a3-9357-75a4a1f40de3.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 0x745a577dab7942602dbc5006a4e22b8c1550f236a7b2483c5a48ac0f518b1ab9. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/AUJEB1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691a3e94bd3d1171d67272cb32282ba26953251733e486832369376f12e0457. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUJEB1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19a6c43a6402e42e8b72da129286955f6e0ebf5ebc1bb0860e3fed4fe7d432. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USCGJ1918856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce8bf76d27b9c773f363a1fe6607cb803436f7cbc24fa4c7ff19979cddbaf0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFYZ2071308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd8ccef48f9b361ef8c98096e74764f3e06e66e2551f0645f444e4fa07fd413. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZFYZ2071310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377596ea55bf19d63a0ffd79a8abba06cfe6f96c88959790f1405f8946146dd. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYZ2071311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26b6d315244b6f84ba75cef36455725227021d63c4443dfdd9de809aabd31f8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFYZ2071315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebcf5b984ddf5566845cca8fe155bea201a19883d30876c56a6d28b30afde36. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFYZ2071316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170294631163bfc8e42ebbe81ff0b962ddb164f149e2054b85624ab3455e16f4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA72048197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147a6b6e74134e9226fa86afa71d7546c6e21afbfaa348e7f824f0a020a840b9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA72048198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b9031de925cb12d666ae043da5b64802cf687232ada946f22ff275f9f76174. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA72048199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39baf06c6235375ebac697f94903c01b7aa2f79d1cd528a3f6b77fec18e722dc. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZDA72048201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5670e77fff11b02b33cf994cb8b14a72db2ac7df71e4f9521dad07cd8c69b7a1. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZDA72048203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58e4a18287eab07a3c467e3942474ac4782187c738117deae604420c2caa7b8. 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/QZDA72048204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a8ec30dfe1c2966e54ac019b85fd3adc6eeb8167fa0ad817d81844f7f96fea. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZMEP2480815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf99cd75ba62c2d7337fa2b2b63713cf53ec258d629408199d0562f45e6ec3d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEP2480816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29abc04dbd554ff88e60c9d0e3cd300cd1aca2e2ee53459955c29428b5376686. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZMEP2480818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4066ccfe0e6c9d8a2f2ec50ecdc284c3d61829e3c801b5c0eddfb3e9eb1495fc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEP2480819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d86c14a7e226955ca24c6e395e3a634065ee9659b42b2c5576427f4d35968f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEP2480820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5cb7386d5f6803007ab78f4954580d9dd52b2599cfdd08a1689a4ae4028f15. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEP2480821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71519c36a7711042e3fa4f515710866ebc1a5765616bef631ba55da448cd247. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEP2480822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2634ec12b817e915dfee3760322970f2aeff503e4ae53de983915a5add724b53. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZMEP2480825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09482c0cd2fed85fb3cb8e42e401afcc921b4898963bb6b22f6f01bf4c05ca1f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTB72449631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe060ebd3fa5dd0e96d128ccc646fde2d63910d2eac59369437c848e495b7e34c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFL2441152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7828871bf81cbbb2483d1ab8e58e8c841607347b3555298006bd8141ee2aee09. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QT3EY2425293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef5c2caca00d0289408b0c886b4ebc0be9aa6ae1b0180bdc6f9641dc57c3e35. 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/QT3EY2425294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8cac1d9f39238522f25f581edd58481caa5c578742fba35ee838b1eee4a4c. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QT3EY2425295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1517c91d37207798b5d24877c9b60021068592facf5f6676ab09ee1f562366. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QT3EY2425297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da0725db92be5bd1139224c83b92bd6d0f706af2fa59e8dfd5497473d9144a2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EY2425298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02a312d66bd5c1527fe3a854ad662ac2822269b1099f470b5232d4d5f23d9c. 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/QZNWZ2576675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39805c90eaba5091e4fe220c353b19e82c668354199b295ec3a0affeba3000d1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNWZ2578001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f27cd60ce0802efac97fa5e81668a81e1b6b629ef52955977844f33c714aa3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/AUOD21301469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf533fc324e3fa232cb6ebf23196c3d6a4f8e58ff6e950ed48aedc6dab76a0dab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFS2479985.