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 0xc3a267028daead8434dec5c07d72ff2f2cab0c5526125f6c9ad99a20a25da9f8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58ade3a3-4d4e-4217-bffa-844f2ba6e735.json and https://artists.proofprofile.net/proofs/artist/58ade3a3-4d4e-4217-bffa-844f2ba6e735.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 0x55ac8f1e362d9a294723f2a1e6aa63bcddbbc9922ca60d6bea41ec5431e07f3c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJY2490586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad6d7c61fdb81d1cae5567d997fab4a12df1de6b1a0270a9256410756dfddaa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJY2490587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a53286fbcd19ce721e2a41793efbfe9da11bca12031a67a1a4d9db4bbe76a. 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/QZNJY2490588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f59f1a13b9206555d1d73e359f1eeab4242bbe9a2b2bc95dbcce217cf12b60. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJY2490589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6c69ba385010bfe12b3a3ac75447f72a964a2070adaea713df7f8ae98bd1c. 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/QZNJZ2451510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8800ad7fe10389dd61a2c512421675bafb36e15317449921b838588885255. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJZ2451511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5cb6b0cccecadd9648c978a3fe3f89f61039795befc7e3c78560a9bcd4be0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:38Z), 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/QZNJZ2451512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a9da0cc04bd0109a85093ff58f40d00de7ffd0581d776fa7b9e2d0786047a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:24:53Z), 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/QZNJZ2451513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542cb4db24dd80de3a6149e22a0c19fac0939853f236b9e8149b659387a23e1a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJZ2496820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301eb43e88c90f5ed9cfc74aedc8a12c2bc1eb4505c11096e6b76633d10d33f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNJZ2496821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8484009129bb54910167c7d6dfba49a030038251fa9c78f0024b3fbb60d55. 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/QZNJZ2496822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b7a07787e02d050a57cf55eeb1121c1ca6d9652d4f4199769128e99ea815d3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:06Z), 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/QZNJZ2496823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb39088a7e61e5c3871a0daddc7a4ae6d1382a7f3cb3b84f723a95046b165f6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:10Z), 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/QZNJZ2496824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1712b7caae1506b16815c7c7af715a72d8e10da9c829b9dadf026f32bfa5a250. 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/QZNJZ2496825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026eb4fabf7ebba84140b557b8d48957bc28f92f3819e9d96eb1546f6801ed8a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:08:02Z), 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/CBEYJ2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dd91e4caa675e93719e2919e12870dd361a2dd1663fe3afcccfe9dfc6d41c8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CBEYJ2401238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61ad82cd5eda6d966a9c62b7a86e47b88aaec9a624745a5e64e58a41d4b8be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CBEYJ2401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf307b52c693ea41a31e477c6f57ac355b0079f30610d47ccfdbb851d411cdc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:56Z), 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/CBEYJ2401239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b12aca3ed8b979d48a897b654771875010681cfde5e74ff97c1b72c3be7d9e. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/CBEYJ2401241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64bb9dafa6293e0bf3e35c9cd31183d800a81904f6f86532665e90f83971e25. 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/CBEYJ2440270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1481c27d49e3c79aebe7c118e484a7092bbf8f491f4723ac8fc3a8da9dfee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CBEYJ2440267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83569cd4801bc0baf3f8dcea1a49ce1f03db302eb3cd9d296eae5e0624ce8fc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CBEYJ2440268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a26dfbe4471a3aa4618b01289da481214d2e69f385bf60568d253c62419de03. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CBEYJ2440269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f560dda5d9ce6c49fb4b7f8d5c172352974a872e485bbd4cdae387ea03b166. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CAHQJ2575488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e8952b8d188635c33fda17fde87ec52c300b719a9b5a1b75d7612eb9a0560d. 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/CAHQJ2575489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab230885c9cdfacadb8c4ac0a648fb9d4fc26a6dea5aa2fb398ea30906fcc436. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CAHQJ2575490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd668ba6e218d4974160780785c3424c34ed2acc932495dc5b46d46ac50babeda. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAHQJ2575491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9a947f6c49a695e9583609bb75ff46320dccc0c065acd2de7299e307378c9c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CAHQJ2575492.