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 0x95e8877cd7e958a49cd0d1b270807e24fb8bd684c0692565f734b437c220bda4. 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/1556927a-3835-4ca3-8125-01c164f1f1b4.json and https://artists.proofprofile.net/proofs/artist/1556927a-3835-4ca3-8125-01c164f1f1b4.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 0x9c2401099c89ad1ff84454221eb0054843fe40f00241a7158be98455236ec803. 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/QZDA61943254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025236e0fe8ff11e4c5a02e8df591370f6177ccd238f8415415b2d842876719b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA61943258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad06b9bb20868cf27e90c9fac5ef849a1fad96c4ee4b68addb1d0ab16cf967. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:33Z), 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/QZDA61943259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e17abc61d8b737454ce851807a913ab3e87063b7ce32f2909ef18eab9270ddf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA61943261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe11d5efc95844174b9565ec44c7024c5aa6f58673699afbb83c82957d78a27d. 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/QM4TW2192396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406094755b19f4aa7fa9e0ea3fac719e05bd525600f3a1f1e68cf77df667cb7a. 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/QM4TW2192430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c22aed4a991bb669427e145d05205b88976ac37bbf74d23f1ed9ee146ee5efd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES09S5800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6ab1d28e89aa51b3a6afa621e2bac2433f6536bfdc23608f05b60d80bd273. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22274440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefc44717a2f3358d3c01c0679352ee75bb660e058dedfbfef4d12120536981a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMF2313145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ddcdacb51eec541b8bf30bede78a3b03cfa9f2de9c1eec60d78ebd730cb08. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2313056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472976c96108592ceb4c80ff3598f7b9cef488fa9f42a820808d230d975ea18. 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/QMFMF2313143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51c6d1616bc4c2353a4c6199f03080f37b314c0a7434f23b205ba1754313b02. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMF2313057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e7eb8f880c5d9691aac7f14b1e879e16c98de5adda8c7391c398c79fb01a3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMF2313467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834c963a4c0381856a1860fa6883022a9b8875fd88cfaf6d84d2d5455fe0fd03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2313059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e036a5d38b40a0462e638a8ad0a942d3c4e9be8634b1a4b720e7683b2de192. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2313060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42b3779621c960a85e0d0aa926c62243d03e01bf95c86c5e8a00ac08107f526. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMF2313146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1f8b416adcda358d221f1879e41a29eec13013795276adadc7e3269e04e874. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFMF2313055.
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 0xb3f5bcdd5e9e2f4c312dd36085386c46a017c7da92086b386118489b7283c6d0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFMF2313147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a7bb884173b8c71adc6f460844c1a52611b8bcb6ca41eef0448b758deed0d1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFMF2313058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9fc53141dbe9b74026f300cbbe4dcaed7d6d8bf549990b7a851c2265e1cfee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMFMF2313142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035b13443ad0f1928ea46549676ac90c6b209af9abe70183004f3f2b2c57789. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMFMF2313144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f5884b0d72775730de557178f864949286af9ae39b3feac52befa78a28fb6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ES71G2423986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dff9197485271cd763f10917e3cc1f285cfa15f84db62f4ae809defb3937ec. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES71G2423988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0bfc090e4fa18b5df6ff88341536013428a0e5b07146316baf24f8c69b21d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ES71G2423989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7696d28d37368a39726fa231ac9be071ae3b767933ecbbda839e6247d3cd2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:49:40Z), 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/ES71G2423990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19304729bf0169480043572a6f00225e2f72e1ea647d125ed9c9fb5a485eb6cf. 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/ES71G2423991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf29feef783dcf02a3e6ea8ee5adb6520dceaa3b54abcd8c886c738ab92d27. 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/ES71G2423992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c2448d0139daffa29d3b5ba620f0b585fe9008da2a97ed24e3fbd7ea4d4404. 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/ES71G2423993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9cf8436d76e196f659f663f56768ffea868ed6324f74ea67936db7fa54e728. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/AUMEV2557733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96bf18932e1de5e4d2a8083b93a0d3ecf6d6b969beb5d5fdf793a3972af062b. 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/AUMEV2557735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7964714382f069d24b014a6fda357a72d148ba4f9850373aae9906e77fd3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH6542044760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f23ce51385e147c3f0e459271ce848c68a492b9fbddd0f691fc5457e444c0. 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/ESA012557383.