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 0x0d02be91b808389f574c0ae16a4268f74f36019b31e90fee7a5227972e3ca921. 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/b500a7b0-f50e-4dc1-9654-0e86fe23be4d.json and https://artists.proofprofile.net/proofs/artist/b500a7b0-f50e-4dc1-9654-0e86fe23be4d.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 0xb44fbd1fa16d74f1f9287811f7ae7b4079c0a918dfe65f7327f7e9261ea96c7b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACD1584931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc4bab57a467aaa96fea3297cfaabb04a18084ec59a52197f14f9e5e2b59536. 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/TCACD1584950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778e70f489a28bbd064074301e50f9a75dd6a74bbb0f2a640ddde2dc971bd17. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:43Z), 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/TCACD1584965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9fcbc71a057a500e78f9cd43b59e811fd49614420b5ce0b31420b568dcf044. 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/TCACD1584987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7f057afce160b946440206dd0fd0382c7b543a3ba480e428ab53d7aed7579. 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/TCACF1567116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c011b222ac720eac19825d4e63973a20fe18444f69726e5ee797046a5287869. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCACF1567124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8cba874971dc8f48b6c4e5aa65e9f8b3eacacf460db82ff2758f137020597. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:30Z), 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/TCACF1567129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a767948ea37f1f747f6934f032063673166df7d2edb424175002573ae86ff. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCACF1567132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1339bd3c4e9dd1632ef95f3164db56c1fcf5ae1593ec47e6b0df8671afa81297. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACF1567138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed879dbeb3122684bdbbde06bb11ea6ffa1f1ab1937b49c9d8ce146c9dd4a6f7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCACQ1698178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a03e8bb6346a693526ccf511253ee618d3a4ebd68668042d2ce8a53e33a20. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:04:53Z), 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/TCACQ1698180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87055a719bad1321255185c3d3f66c1099d5a06a255a6642248b8dac7c2bd8a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:33Z), 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/TCACQ1698189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019474671cb42a0e0cc14823f483d1231a2c446e21a6e9a236376a032b52e5cd. 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/TCACQ1698191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6568a4b87dc1f030d0f76aef79bd159fa66a53a18256f955904048393039da98. 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/TCACQ1698192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f1fd138f99c26a0e37374315cb8a47976a306d73951eb59f6cdd97e703051. 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/TCACQ1698195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745db7581b6328f09a350caa1a3f51ee21905b62aa599b0ec48c1a46b19f7721. 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/TCAEG1920737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc19d78dd438b424e5108698f82dbd99d47d513ef553d0165722ba7fb13eaf9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:56Z), 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/TCAEG1920746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3432bf88ab6f76a4f4f5a664eb87338b22770beabd4db08da1393b8702f5e01. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:20Z), 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/TCAEG1920755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c02bae23b6974bb7d575b1ad383c11cfa9a08a0e5c82aac6fc5b670f88448a. 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/TCAEG1920766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c22091b57e71d9b2fbcbb59728a33696373f689d41ea5f58e36022e2f8c9736. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:17:30Z), 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/TCAEG1920785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4be3b6c0f01308bb037c28d7700fe6dfd5956fff80fc42886de7e09ac80842. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAFN2168042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e846101d46f4e3891864d95112ff6c475ee151dc899f1ebca03b17a43eea1db. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFN2168062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f70451a26b3deaf0e56af64563403f5cba97fa0afc92b6da98bbbcc55f2149. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAFN2168083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e624e28ef783c2de3d30f0c67a36c8e6bf1abb9a52fea00aef2f69a5ab980. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:22:05Z), 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/TCAFN2168099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae6db311a75cf2758453bba481ec7bdd363084dec11af46f6e522020e59452. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:49Z), 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/TCAFN2168107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc93187e87f109e1646192e202f7a98cdd3eb3284d23f686ee954b6284aa1e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFN2168114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89176b82e0f223ab9acb3bfa308b60fcd85c8b80d2b070f2e95c24aa5137f7e3. 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/TCAFN2168118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ae552f3636068e652f97c6210287480081ac45df8fbf64022887bcd091b2f3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAFN2168135.