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 0x7fe598575d25415d5a3a1656c8ed9537084ea773b726d6565172059a4208b393. 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/21579929-f06d-46ae-8db5-3bfb678cac58.json and https://artists.proofprofile.net/proofs/artist/21579929-f06d-46ae-8db5-3bfb678cac58.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 0x295f761d3d9f61f0523c67734b9d0a98d4e753399fe1ccc01f9aa3ff8aac5b47. 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/FR6V81673586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981747ec415e239bc035ddd997aac0ab627c6302fcfbc76f20e26e2c6c30481c. 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/TCAGL2228831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578a9f2309d9b9b0e2dd1e58fbe07ec79da8d6ed820652d4f3ae7ce03b6e84f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAGL2228834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f98c204d93cad6435aba2e47bd0adc2e4d2817fb64fe65c057bdba80d091984. 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/TCAGL2228839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9cb07724ba07acaa08b182189bb93178cdbebd38732c3dec7d980097ad1270. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAGL2228842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11631e9d2dd9b35be2215f2fbdbcd333c101ba9ad8aa51f8bd99aee950695d3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAGL2228844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb15d15fd290140fb48fb996ec85bdf13016514a1bf2fe19f87ac7f61337d5. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCAGL2228848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed9856adb28635ee57158f4840d1cd1e0eb00a6af5e439607672e0f2c44b284. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAGL2228851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae6595ef1244db6aeec31e149ec55ba9a1ef73012898c3e74c705cf297d4613. 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/TCAGL2228854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98ff4e6e42666b21725ba93d7bc4af8a854f908c34c3ff954bbfb0fe2a526ef. 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/TCAGL2228857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd16090c00fc9bf9f68533f1e65783476dcfa941f2b76df121035e064a3e25. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGL2228876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf226c7d3c69aa40a890a2dcb3e870b5e63e09071562d3ada308b463dfdacd592. 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/TCAGL2228882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e78d746bef84b652b14c6968c56b31bf48a1bd4ecf0a765980a40287f123d2. 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/TCAGL2228893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d18e0e4a1f2918df9c15b35e25d4e4db0a7857edd66ab2e9178a84750e140f7. 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/TCAGM2201892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f05918467e7db86ebf7d76880838fcbdd40b5271a2ebc4bca1465fd55477c2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGM2201897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36d5f104369d0f7ed8a84b78e8dbcc96882d529ce10980e0b2fc50d064aa96d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGM2201936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09dfca25d89d83249027144cbf94e7cd62009840ff5567eceb788d5cc76cf9a. 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/TCAFW2109312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff681eba81be4aff6df92d1ca5c5857e98f373de9a083ff67c43b32b8c8b2a81. 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/TCAGL2228734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e20e9cd67df3f44cff08dd9798cd6701d6df0650ad0e1b0f9d878d6da2ddf6. 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/TCAGL2228741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc2dd734cc1d9f12e30b47a442a1cfbd279f74ed40ad90517fcff20a940d629. 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/TCAFW2108994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057cab0a5e1c6b755a7cd9e32646fd429566f235798c903e29f39d3ca26ecc69. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/TCAFW2109309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d01871c5ff9957c0da954cfb59757e27d0db44a30cbf380d36774b96059510. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ZA82M2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc5e5ed2227da71368b2083607bab3c6c9ddfcd45b573e58cae6a408bb54e5b. 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/ZA82M2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30548a35a4d8ea65486e4154036b3e5ee512ad8ae8d3565a9f49c253af9e63a7. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ZA82M2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48727c20b5406c60d3d6380bae3287a2245658ae0eb007bec07ec63c6cf271f. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ZA82M2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865e07b6d9b21f53a39a9999d3cf600d672c11a19402001cbc3e56b9d0668463. 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/ZA82M2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b4360d8a65755c1102357a756323289c3f3deea4cac15ba7aa5994b3acd70c. 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/ZA82M2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352c3f55c149a3e9c67fb7cef65cb7437607506b1151c7a9a1422dfbebbb3d4. 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/ZA82M2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccb0d22c833d4129f8ab602bcf193e9204a5a6fe5a3db7adab6cf5f6970337. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ZA82M2200013.