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 0x0c7d4d9ad62be250e016e48771ccd05fc7099aa9ba6650f4684ecf10157605b6. 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/2fd7b112-f6fb-4c75-a0a2-f826b895ea8d.json and https://artists.proofprofile.net/proofs/artist/2fd7b112-f6fb-4c75-a0a2-f826b895ea8d.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 0xc110260d1aa559c4d9c63bf2bb3d652404114adcccbecd25f5f65916f537b292. 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/QZNWX2301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a9a04fc3566057ba5b2e6fa121da9d1ad44aebe2f08d50a95b69ba76a044fc. 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/QZNWX2304734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0da02e3742cd43dee4f467770beb72d6b914e2ecb3b5f5368d305f91d76b901. 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/QZTAX2300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cd954b43135dd2717fd624d6653036883d67c1fd65ae8f6bcc3366a401b7df. 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/QZTBE2383432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad2de635102a8dcf99c8c56cdf1ef41c7c5de404ea717385b0c6436647100f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAHY2463074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b270bff1f180554f21dec7a09c4837c418eb258041d40517bbc6b7f9e45b65. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAHZ2418688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76975abc2b00f28b48bbe08ea5dac44aa97e955f1d86d56128497a308176b6b. 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/TCAID2471033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac5286ebaf7ec02015fb95dae9a3fa36607abbe9f29827aad2e71f9c88077c4. 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/TCAIH2494506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd1139c71369a1ba83acdb72e0c84e710d0bc0acbc8841f927729391087cfa. 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/TCAIM2498867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3126ff124639fe9b61ddf964cc769817485f90d77b072c36da3f6fc8764934dc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TLVEM2472460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec60c7f70ea0911400667d52b204d50fef9589ef6d50b21e26a0dfedfb44f829. 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/TLVEM2483009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd45c251b0e582de5634bc2e6ca3954046337fc491772a74bec9364e6010797. 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/QT2VB2415200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4140a1a86a47baea5e0fec797e3bd6b008fbb0c60539efe73fc0b9904ff198. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QT2VB2438245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326072afe35892c9ced642f1a6dee6893893e312819a2a265f7d8423590e211. 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/QT2VB2438246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e0e7214693ebfdde8a5ac08a1dc1ba7ab7d512c8aadb3126a84f8f01db6d9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:28:45Z), 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/QT2VB2438258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841bedc498ef67a4bb981ccc3b09426e8873f0aa337310720af93f35e0bd080. 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/QT2VB2438265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf39698c0decd088aaf5467c66224e50bcf56f618e8494a1e720a9f7dedb24b7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:09Z), 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/QZS672484881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38146bb75c148e1d70bb6e290852be27b8e31e6471ea7c7f093df834823b328. 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/QT2VB2492392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba74afa4bbcf23d1f78885ede36047d27cb1215df7626878ce226054646965. 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/QT2VB2492388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f07b404e36f92fcbc44647e699e850debbc9e2948c5127eff8f1df3b514d3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZVEM1850628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d502e9ebd84053db9cb71930cdbabe2a3f4365f5b102d89a67b98ca7c237dc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZMHK2520031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f08cbf365df92cab10b6e4a508c9e026cc9d4be2e53082cd0d758e36655be. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZMHP2503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a9305f865cdff31f44dab799126d0f73340d65340b378ad40ba70d8ec86bed. 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/QZMHK2586350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa0857362e901d5a1af71c619de6d481743f2bdab25af01553377d9ac8482c8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM42K2576855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08941174b98a5b9e9b5c57cf62b9bf536635a1c93c943ea552450f82eff6e10. 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/QZTAS2367093.