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 0x86945b16fd6cf936a8953d3bb4ad3bcbef5f85df5c69abff3c0d09da5ac6417c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c1af404-3f8e-4a2d-8269-d83f054b6aa0.json and https://artists.proofprofile.net/proofs/artist/5c1af404-3f8e-4a2d-8269-d83f054b6aa0.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 0x8e94b3dd7ff8f948a562118ae156c243e4f170560ffb547b5b95cfb1665846dc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:33:33Z), 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/QZES62358897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977187c26410da7b53ed66cbec9e7adb336011ebe772d54ccb1057ed028403cd. 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/QZES62358900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d78760240d15b773f59a44f3dbc44cbd15c41a5458246f0218f6c82f899eb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES62358902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185a5dd207d51f4950593ec487d7318a6d1da10fe6b06113c2882af2bcc5affb. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:01:10Z), 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/QZK6N2232563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa05a2cc497864fb674970994300425886d8d3377bee1b13ee743efca776463. 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/QZK6N2232565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653b7596265277b9ce96cf4dba287292d8d4e0f5fbd523b9a0c1e87edcd2ce4d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6M2284704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859e59c16803378387d563962c3b2c5fc9893b7d1207c54a65cb081b9160c677. 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/QZK6M2284706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd31cf2f38073fc36fd42c06f5bab2133995e75d08b88c86d52d1d0f0e082a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:48Z), 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/QZK6M2284708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faee9f312585a8d1ed7b4331663299b70c1622317705d991e406dae70a7e405. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6M2284709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a521cfe5f8836ae9f3504cd7d27fa502e82a0df94bfcb8033eb0cf97323d2. 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/QZDA82209293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe14830a4213451bbe98e7251c99105e4a1a1414f5569b9e26a1e9d863a2b0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:43:23Z), 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/QZDA82209294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ffeee345e21a402c0400fcaeccce8cd2be860877169213bd5c47b748a2f5c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA82209305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5304f8c2b98266ca15ffdec5c7fcbe5846345e88e3e2e03f9b5631dc9108eeef. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTB82238375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e46274526282eaf624f0b82629dc823879177e2d9617425234c2f94e3de440e. 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/QZES62359887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbf91d9202d171747051674fbf878dc8ef05730a641a00b93cf3fbb1df62a76. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:43:25Z), 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/QZES62359889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27a76b33e436229e96dd245adb80dc6e18a8782de4e37832ffdcd3ea2ef9022. 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/QZES82350727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390d513373a91f3e97ea719758f5c057ee58e42d9008588f475e6342df4956cc. 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/QZES92305672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2517acf47ebbe8221d338fe774abda391e910ad47dc68641d79b3bbb6e1a9f97. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:43Z), 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/QZES92305673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d858f4fda42d1c2d5b2c44cf8047a6959f7014e01348e47934cbe12b80306f3. 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/QZTB32351495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c02b340985c28cf4f31cc3d0f78e7e0c4c88863ae6c0cb4b1555ae26050e9. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAX2404660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26d77036c8f318c0b934a7eb0920a876d2fea0d58d035bd911b5af3d79d6ea3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:39Z), 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/QZTAX2404661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b9aad9b9524cde8d91992097b34c56971bbbc97af059c86c6251f3c8c55684. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:13Z), 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/QZTAX2404663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c39490481176bae2e87f3984104370a928d2a19f247492073872c0511d8c9f. 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/QZTAX2404664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016fc7e0fc7e51617308e68432889d28345140e389eec2bb0fe06b21696dd2c6. 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/QZTAX2404665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1b5a6607849e63bf6cdab4121aaeccebe2927310f4c6ae05dcd477bf82e36. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAX2404666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31942790dac60bb7e1c94da588d0c397a5d2589da38a5aeaa2f156926fc657e6. 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/QZFYZ2573227.