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 0x9468fe443c36f075e1dc9dae0e398a446a393572a49631a8d2acfc2b9c0448a9. 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/73c97210-51ec-4ff4-afa6-66e6a3e7ef56.json and https://artists.proofprofile.net/proofs/artist/73c97210-51ec-4ff4-afa6-66e6a3e7ef56.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 0x4b012bacd80881d09b098577697aace32f2372c8629aa2e73c4cb6bad4640e0f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NZPB12303650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa737904439fae835c480bd59794be5f0627582cc2f1b5041555e587f95d05cda. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZPLR2367791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb97f1ecab57ace1449605fb9a3855609839f5d835de895dab7deaf114b081. 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/NZPB12303652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3becf55a00924e14c7f7ee5aacfcd257ee584961dee3fe2424a91e28eedef. 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/NZPB12303736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2e48d2b0260e936c5aeed304b0094180e0544cea9c5156727071ad0aad81e4. 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/NZPB12303737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3063381dbbd08761010578bfbf05b10c96072880313b85b05a4362b7968879. 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/FRS721600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ede829cdc10c6804fc8827af37258d86c77227131e34e67a8665bd2e26576d. 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/FRS721600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375b3a4edcd922011c586b52420b55cbf49f49e287855a5d2f04cff70c9d8f77. 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/FRS721600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b689f29a582a0c8846b033a711b08721c2009f62cd79a5db8eead8f09f1214. 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/FRS721600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e3b161b6b727e75096abe6d014b35357d883179f85f86d7bfa3ea7deb617c6. 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/QZMZ92553652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1db4791dbe0e5780fc784be3e1e51809290042fc74b041841c2ae47968205c. 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/AUBEC1833186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd94c300161d35e9f2be33083c65fb89e629d91a49a544f86ff44e091dca59aa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUBEC1833188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ae0b38468a0a7c6892bccfb2637ebf7b267f898812aa4be0cd105e7ebf0b4a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUBEC1833194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afd05d60e2dabe1eb7d9992637cb537a18dd11a7ced817e2f417c0a5afc874c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUBEC1833196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4542ba32593442b75baffaa3fc47c46e5ab9e27a5e006833ad5cbbd31314ab9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AUBEC1833200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4075c06b50374a6bdeca950e477d75b974fe4eeace89e7044583c2498edb69. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/AUBEC1833199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28551fd40c61c4d8d85a6516b1be40b07d61d948ceeb71dd0288a52548be41a1. 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/AUBEC1833225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad0220cf9866b793a927d8e999399eac5ff2191b6deced4622e0f6a9a7198a. 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/AUBEC1833226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff192268c7533df829efaa4c61f9af54d981e08e412cbc75f711b21a12b9eac. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/AUBEC1833231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9efd08af14fd835c0d19300a612e58582f1ae3caf037bdb9b901ac3b369de. 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/AUBEC1833232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390df9dd2589983711324d9408c03f6140d81c83c703bb1ed534bb42b15f4a7. 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/AUBEC1833217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414c4f46455f23bf02575eb5cff7d2a3ce8b408aa0cf265ffd3bb3de151b7d1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/AUBEC1833220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e81fe1a3cfac3488113e3a5233397515cef06ed86728d70d2e36ba4a58c82cf. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/NZPB12400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682f4d0e37c4ccbc1bec3bc33d16580b875e004b01c5d8886be653e3de684d9b. 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/QZHN62087994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91cfd5e22b4bb962f361164032ec58711fc73a1284b65abfe8f2d1b0612915. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN32065622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05c83f10a191143c884255dc9fd277ac83745d7e2045b9b3308121638643a22. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA82039786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15499cd66114b0cbbc55ba935a2875c34911860469d0337b44a25a7598ce771c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN52090896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2959da414dcf7d6da47de99b740331058da605ab2d5e9115cc596ce3828108. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/NZPB12400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4563b4ff0f3202195bec2f81aa320d95b7bdffe9b8677b303863abc1f3052633. 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/NZPB12400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda3b91c1448496e5628b36c526e46edbded942d261c69f681b51b6c131b6c4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NZPB12400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2959da414dcf7d6da47de99b740331058da605ab2d5e9115cc596ce3828108. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/NZPB12400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d4633fd92889032c3ee27bf6684281e5f7e983172591cb92daba7d74ded55. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/NZPB12400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc481a58f3ca7d8db4a105a3c136a3e1a3305903a0a60ff13bf20e7140fb13be5. 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/NZPB12400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d4633fd92889032c3ee27bf6684281e5f7e983172591cb92daba7d74ded55. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/NZPB12400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160f50a4a7f3968a1e1facb3ec8ffca6ab562dfad4d468bc0536909017af85f. 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/NZPB12400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357c4ffeb356356e1cbf678aa96fc50c44c31942a853484c70ebcbb84ae55516. 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/NZPB12400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91163ac208b00f33bc12a0982577d22186582e00b5086136eb611b1578da42fd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NZPB12400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277fe1245553cc37d5cc87abe91656dff298df14fa753d56b3971014bd14213a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTBA2233491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263235bac912a419a95ecf3328d88072e585d9c52476e89c22a25ea20e17b66. 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/NZPB12303651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3099424a15e5044db96f6031d6440c3339c7ce299ebbb7177784a4aaf7b2c0d. 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/QZK6L2273219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45a0a94697117ab661088c5b1ff5916e9fbc37f634db82ce9599df510190939. 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/NZPB12300483.