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 0xf3c08e34d8a4fa7652a943d3148f6c903fc8e5231b26e06e895a6733d530a1e9. 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/4d4f295c-d952-4c92-8e5d-0b746921ac31.json and https://artists.proofprofile.net/proofs/artist/4d4f295c-d952-4c92-8e5d-0b746921ac31.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 0x207d3ad121ac4a42884040a091a8da84a8332b3cccf43c702613989fc8464971. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZNMW2300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2090732185940f978bb16cc622156e8198c7211fb530ae855661c3b0a2feec. 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/QZNMY2369137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2291372611bd1e226fce8409b493e1cf3ff1efe310e152d601737dfec939f. 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/QZNN22385377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baf3f1be674d3def51a164661c15d3470ca08d1efd4c6cee61d8a6e6cb0c6aa. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/QZL382433627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340dfd8ba4472f422cfa7e7e6e70fb31c538b7c682a7ed02e03ba8cac0fbc85. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZL382463298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea8f3458ff844dc09fb084d83491420fc3a33ea13649da9765c51a0f6590f89. 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/USLD91759934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e3f4a9de7ac23d8e95b8333465faeca02c74688c5e99a37b55dfb4e088149. 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/USLD91761728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e61b064176cdb3bf67775d4fe84df767a19f2664cd674aba960b788f13a179. 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/USLD91761730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f4e234dcbc1e71945fadb94dadba5b7d03f42a839cd652f8acb83c67941b9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USLD91761731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb0c290e1e0f80650a13e079e57a02a60578e832bba4d43f45a439833b73dfa. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USLD91761732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7001fc6ab95dd0546f060cba6051a1c0b30304929fd37a25d9a33a740a8a58a9. 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/USLD91761733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d688c935bd74d480d62e3bc74527e4aa741b555a5d0b98a842f451545ab6459. 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/USLD91761736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340dfd8ba4472f422cfa7e7e6e70fb31c538b7c682a7ed02e03ba8cac0fbc85. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZL382463298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d8b492b6e41903efba4ad6b38a53197fce63937c49628fc70ecf277a6667b. 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/USLD91758780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b562b0c2d570ae86dcf5c154edaf0e76cc3c9211324b9645d92b02368890494. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USLD91765523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813599aae0a44a57ca7ea0d59fc51007ddfe1186a8c887abef5c01d06f242cb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USLD91767310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1ba79b786f01921c58fa7067641eface72b7e8c39e702dfab9f1a452f0ec3b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USLD91767311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be61e23cb5a6254f35e3990395bfc9e59a4dad0360dc7f3c9385591d0248b42. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USLD91767312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f47c17bdadc5215d1136cdfc780fea9c171af7c159e5e4848ebfb245250e26. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USLD91767313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3924a93fdd58ac20f2f3fcb68356f32f7b9c62193605fc77a81ecbfa47e809c6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USLD91767314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c69b51eb18534617be5bde59aa37c432520fde938752c1a038ed0bfd183b1fe. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLD91767316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbead20144e8f8456715e06383f238ced1d703f7d7c87b3826f4efd43661d11. 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/USLD91767317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e97aba3a09055af921691cdfcc6fb425dc0b30848785a12d7177946db6461f2. 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/USLD91767318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d960aa6ead3a76c2aa72652320e5c4435ab09de14740b5666b37238a3762ed. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USLD91767319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a28c2d56201a0e6ecef3fc2739319c5b7c162759477c5add1fbdcb88131d69. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USLD91768984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28724c2bcbfdec533da025fc25460deec2816d741cfb5efddb76e091be0ea2fa. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USLD91769913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b60d0b98f496f4328a08c8ba7423c12fa56e1e6f96049b1e57f173d9ffb0f. 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/USLD91770335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2377d1b65986379086fc6f2867c6570844fb6ccc628777f6f62069320a7bab. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USLD91770338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a2be8806d514dcf3fa0dbbecbab8ed67718a79c78c57abea1411b8c7b77ca. 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/USLD91770341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28724c2bcbfdec533da025fc25460deec2816d741cfb5efddb76e091be0ea2fa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USLD91769913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c926fc8b96f84d8a8b0453214dc420dd8c67936c9af33b45ca47359ca69ee0. 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/USLD91774823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985818277ee7cdaf47d0d19b453e442404f3ccae16920367a85312bf9a11c70d. 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/USLD91777016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d3bf49197a9fb12f547fff7eda0f0f0ba9ffb39754a7eb9da226462d522837. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USLD91777018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378808a438f77b09c80becdb0c2af727be6f641bf0df9bd9e83a3992e3e4e3ec. 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/USLD91777020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e0ab50e87d3c6235e4667eb9437779c113ffd0f1bb58ee270640b204aaf1f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USLD91777021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcc9eb11cf3cbc67603b01d406edd9ec413d91b4d7fb8f862ba89708e982de3. 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/USLD91781531.