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 0x5db605f29a1e2cc127ddb04b684455f99fdb10b697a70de435e1c1ba3a30e483. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2796c74a-eca8-4225-82fc-c605f8092a1b.json and https://artists.proofprofile.net/proofs/artist/2796c74a-eca8-4225-82fc-c605f8092a1b.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 0xdc28e1fa2299b4d96563f8a94cffb66b987d1b0b35586f418a0006a138e2a703. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/BRMKP0400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7b28e2bfec521820496aa2fdf50f54f80c6f73f07d0f68671e341fec00c6f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BRMKP0400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ac8aa088751b1337e4ae11d8a398e112b3810b17fdb5729aa22b94661a7e28. 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/BRMKP0400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797bffc22ceab8a0b976eb2f0378c374463b79d7ce6f941f4d552b544142aed1. 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/BRMKP0400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f5223aa7d4194fdf33fc5aea588f101ece165e870977f9a98e8b758326ecf. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BRMKP0400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28bfc7050ad40174cfd603da49c0b061a85992825da2c290f98cd34f2c3f418. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/BRMKP0400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4aa8348b93fa58b1cec2e1b01845a14c0fa421b8668998dc60315dc7b3f94. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/BRMKP0400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc9f453f4f2beac14d95ff6e8f17b25280c86f9590770d1a9614b54cd942a6. 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/BRMKP0400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ed907d14a1a44c2b53622ed7e78ac096fc32f9971e3894475e0b1a716c8ce. 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/BRMKP0400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705632a0e88a31d0c01e93029081a4c387661260373c7582ce87064e288f6197. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BROOL1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464038d7e00cd5d532a9f197b3f8a1b95196c50a820d4426857c5c5994384733. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BROOL1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac5746e5a0d6068b6a99f5464216bc24fac9c5373290937cae2c3b03273e5a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:46Z), 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/BROOL1200010.
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 0xf4f2712dee02a6d8e39d06c374d776f5ceb99498b65384bab70178a2de46dcdb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BROOL1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af35d9b6dd80adb0ef469f65d7668c31561f2a0f00b4c04e03ce87cff3764c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BROOL1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600397d774528f0ea658d7aa5f127e50ecd9eaff3e337a1ec2cea1be4f21612b. 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/BROOL1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b20e8a8bbe03784f636b08d24b3b141ab47c95bba400a1e806e24e412b810. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BROOL1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828ae85ad178d845c7494db052e995850b34627a5778a689ea57ca26573578fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BROOL1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab9092e217b4cb64183c20ce043c0eebc879d96b471fb0ae272fac68a06a44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BROOL1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836781d4905c4517842111a7e9aa298f4dd96169aaea53507aa93c0a2353cc75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BROOL1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea6750c0d03252869525ceaeda26436b512591996e4a55e039f521525b9673b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BROOL1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbea9e857e76be18a2aea94c2fe62afa84c39dcc7062114d01e106607d265dcc. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BROOL1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e819dbe65e9b0e5d4fd69ccf24258ffe03069cdc7771e4913f786da5454c774. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BROOL1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba361d3c739d0e2f1fac01745e18aacb4cebe3a5122403fb1df2d357444329f1. 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/BROOL1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8a8e508e3cd91d5395517a9fa109d08cbba51f92d05d5958bbc8675e8c0530. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:39Z), 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/BROOD1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b4b9c06b9935af3d7b4cd6a293090c3e50ac41bd33c64e768b29d24fd08240. 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/BROOL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba822b63e6eccb0cd0e6768661bef0e8bb14aa9e729b35fca46769bdddb5ee5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BROOL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c12af88ee3771f37a5c1e0acb6051b122f9e41ebcf5f30ff64317cc365361da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRMKP0400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b5b05aeedea67c49c778e578eb9732ef43bb66407d22592a3d9a593886abc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRMKP0300402.