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 0x34077e9b5ba9a70b977c9c9856aa9cfbccc3e43218033e3b5e2dfa8a6d02ee73. 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/b7dd88a6-1fca-4c36-87fe-dd97507fe31f.json and https://artists.proofprofile.net/proofs/artist/b7dd88a6-1fca-4c36-87fe-dd97507fe31f.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 0x02375cc53cea7a55f233e929b59052ed570deabc75d7ba1c6ee50500bc1f22ea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/HKG732040308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e4bbe5f9d7a0f5a71a5355d8f37d34fb327faa9cb59be99f3e66cec9c536b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/HKG732040311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a056015483eac8226bdcd3ddad1d9495858b8dc02200acdc375b4c920fb67. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/HKG732040306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879dcaac2d0d654dc07ce42c185aba452fc7fb6359ca3abf654bf0d94881c604. 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/HKG732120821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4a92524dcbb4986627c61cb535dc3619d0d770c7c3f6a654499e6be4f76d8e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HKG732103005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282174559b25f4898c71c7dfba5dd4bb26957708069948328e45edba308f377. 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/HKG732103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1695213469f217bc4fc48e269aed1dd09d0a0d389526662e53008f2d68d950f1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:36Z), 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/HKG732120305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a8b4334cad2ecec4db08b64c77f870dd0c9b350fc3ee65e7449fee8837c74. 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/HKG732120431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ad26e871e3b258e7cf5f3c7a10865fa2b4e37584a085cc06b29119cf9b51d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:39Z), 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/HKG732120432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabd6b244d96bba72138d00da2230699ad72fe325e27daad53c9cd93dc0aa6d8. 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/HKG732104003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19ae653355cd5949bdaff3258060cc056356d27e28cd87b1f25a35e0bf1222. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:17Z), 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/HKG732106268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e903ef0df22f8663cb1b7d6fe437ef9f0b4c3e3c3d3092e6abdee957dafaa5. 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/HKG732281883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f66fc84a1cba03a3435644382513c9e8b84a5ce2b98ac680db440a4f5807e. 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/HKG732291997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd85c6758eea4cf8060a67fe8b1e5f74c2aa69d117f2596f8a8d41b9a489467. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:42Z), 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/GXF9Q2569130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef75510ef88b1f85166fd86c9cc7a9e484a15cf2c09545a4cbf7aeecbb528552. 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/GXF9Q2569134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feda70b9945811fc687184fd8ce377a045c35801cc352cdc0d8254e11f32d3b. 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/GBMA22552127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deb0393ce45fd43c8624a5880c4c08fc9105bd338a8a3294199be1151d5cfa4. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:31:24Z), 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/INAE32501994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541f50f3e327bd8d98fe2d909a3212c2e9aa9354189af1a0fdfe80bec835b0ea. 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/INAE32501995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a061dfd490a2dcb806508fbdd29a3968641e3e76edcdd66fcdd9e7b3c98746. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:35:57Z), 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/INAE32502283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cba1137ddca9c6fa436fb7491653cfb8541b542aaaba45e3283d0a7ee34f9d. 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/INAE32502284.