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 0x34d9e82ba8fc77310b450a25774250f2046b1425814a301126bf6856671f21de. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e640d335-def5-4ee2-be04-5f42f7cea69c.json and https://artists.proofprofile.net/proofs/artist/e640d335-def5-4ee2-be04-5f42f7cea69c.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 0xb3162306630f7081d06884f1475b1b1a550fe38e9ddb53bddcd4711d072903aa. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN42533722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a10d892ba3cb28e144984fc90897541e0423a791cc2b246f4c61be1bed9b6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92553288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f6ee0ae86f7d9c092895dee5927f03b1aa4956898760edf0f08481c7a2facd. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZK6M2580963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0718dcc5885e5d24cdb8bb3991531e9854f798ca1aa006845268310441beb39a. 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/QZNWS2574873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d634ccf661bd1b9f2137da0ee06a8a99461d26520ed315e10e6bf9ad1482b6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:42Z), 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/QZNWT2519993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8606d11256a761913cec6512383ff76e10b76ee42f60453a01fc2de6e08e804. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWT2519995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a118c47f834f01675e87972983ace7b7f2b07effc8785e10b933e4c9f3b99. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:02Z), 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/QZNWT2519996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527f87602b3e17c9f905a84b1dfa3f7742f929a13ed9f64e615a39ba1eebc57b. 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/QZNWY2558160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d936f879f911e86034868db44845ec0c2dbd268741298eaae82c5179b7f9b0d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLR2539583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e9377dce7ec698bbb1bb3808c0cfaad13da06e80b3c9440b1d99e7739bb34e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB62506795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbaf95a5a872696453304dc265119db9635de3becf9dc9e858c2f4d92fd6e15. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB62506796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de2c3bd3822688a3650b122028c3af78cdf9384d109c3f22ec6edfd2dc04a6e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:44Z), 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/QZTB62506797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181ccd74f6c7a1aa8af2e61c92d180aa3ce66bf7737479833f821ecaa9d09b47. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:35Z), 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/QZTB62506799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11347e7d186338fa8c76b0e64f70796e1b3c93f34a07a14b7a85914bb463d784. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB62506800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1227eca950952644b6982bc7d10ab45b28b982a6f3ac3eb7bd391014b906d662. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB62506801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8ee2906724297725ca4deb7d2f23abb7c9faaa0abe810eb3cfdf47932a6077. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTB22551901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afbf339e3521c75ffdd3f72a33045e0dd6dfae0b598f81188b6fbd8088bc097. 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/QZWFG2593764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfb17eb35623ff1a4f7e8b2acd8beda227a4fbc09ec7028c265c853144645af. 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/QZWFG2593765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20557db4c29791998d5649290ab29e543166ea05c840283cc5843669980e02c7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFG2593767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a13bad9857d842f73ce723ec115f8c42292bd959dbab7bfd6d8e99c393372c0. 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/QZWFG2593768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e6674c8fbb66f0e4818ee7abb2edf4c96fc5a67654b56c8d32048a4c2f4ab. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:30Z), 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/QZZ7L2560768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565c2b74739626519280f2c7b6a2f3a3177329dd81778afb6bcfcfb90f816bf4. 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/QZZ7T2593636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac85aa318f484e242e8f19ddc96b4706835cc4acd392731a5bafa2d845f88f. 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/QT3F42513766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6968bd54c511e0269ebbcd49c370febd9d607fa31a5db846eff988385f4137a6. 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/QT3FC2594007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63873f1b2c52c32586abbca66b8b1818a1f92ce0b51b11c09be32831bb63ce02. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:00:17Z), 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/QT3FE2563175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18a2a87a30f50ff34cbbe25ce8e7a50483e005d2de85087d6f25eba7ed3a3de. 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/QT6E82586496.