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 0x86d4f7a17008d7d0cb59783975af43c6cfdc006f5c0ace99db6a6b85f3e99c7e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4edc29b2-6ad7-49ba-b228-24bc455fea8a.json and https://artists.proofprofile.net/proofs/artist/4edc29b2-6ad7-49ba-b228-24bc455fea8a.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 0xf58bc52078827bccbc7ec92a3d4eaff788f44c465f3ff62a358b9ef70938c533. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMEN2357656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab3ff0f92faf5529ae13e2afab241dc2c87227529e368f6dec4aefe2845d3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEN2357657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bdaa4f5e2d832fdafaae954fd808ae92469785a47ddec6f61dbbddb1773f53. 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/QZMEN2357660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32949fc001e80dba44c2e10102ff6f36dc58af79957f92567d3878c34fa78533. 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/QZMEN2357666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997245a473e0d8a651844e73fc18acb2a5075941983b69ad31b159048dc26b85. 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/QZMEN2357668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00fa062b130a62cc71e8e4fa7199d3b98e4ad3333e7c8059f6d9d629b255091. 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/QZMEN2357669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8307bb08fd7e529fbfb9648ab75f3fc86a086581b42fc1a55c0f2e8033cc5d0c. 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/QZMEN2357671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b5b085d8850c0f880ccbcc7a85be8ba4de2fb07f4f291815cb59642cd0224c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMEN2357655.
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 0x50dbb999bba3edda03c0529430ca046d2c3a12f02c1e15f47d696b65f43be003. 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/QZMEN2357658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed9f8ae1c08d1e0f301cfe93e50bcc53668c99059ecb3738803f6c2dd79859. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMEN2357659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000dac54ce0cb9df0abe77197f7a024e4617c6c2584a645763cff6b2054b07a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMEN2357661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b1c636114be0e6ba859ffa2f35192cc9ff7a93035daa53f6641092ca1d136d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZMEN2357662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5069ccbebbb63b8d82da4e0ad82b4415711fa399d10fc2795877b4979354ae5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMEN2357663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2152ca486cf852350707afaddfed0ce9589015228d5c62049965f31e6b00453. 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/QZMEN2357664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fca9e8f76c4e1b8569eb08246669d2fe539797edc4ebf8a18bc1192f262e30. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMEN2357665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd0d280afb92e17752dc2563a1234b4002dc9dba3c2b8ecb650a457f1e231be. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZMEN2357667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0296708ce10cf30f4e914e45b856f1605eea851abd4b2f6c947914a4190458. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMEN2357670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3588a8b3e3559b2c0176f09cd41f5805699e0990ffbc13f0634994d4a9a5b0f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZMEN2357672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2262a57b5498a1a239d5e865a2187357163c8273e7d7867524bf92a25f2c98. 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/QZFYX2474937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c394f6456f0c20be219d8ff4bdaeafb19f67aea75150be00c3359e40e17dd3. 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/QZFYX2474938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d4eb2d764855583fd1c1496ca659006c05880d858d31e6c0b071b1d65cb3a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30e14d9d612ae0534f2744430b2e41076d65f1279d9f52587376cd524c6562. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917b121c07de5139698812c0154f54c6c7518f82533f4b9e7c2e0b14132a2a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc982daa06c1733e212d8959a44b168dd6ce921f481fddbaf8f5ca83df4b13b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d9b3592d691ded88ff4db8d6aae01ad069d5c5eb4fc37238298cb1ff78fb25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59708b7e49cbe5562390e46d9aec1eba545e5d349e81a590b04016f500db925. 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/QZFYX2474944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a081529d849e923bafca2b1ae77ff0017afdfd22cfe550f655291095ddd20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX2474945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99ca9c3cd6e7f3256de3344aceacc32c9e0346c0a47ce1ffa017f0ed7eff693. 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/QZFYX2474946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dca90d3c8b078a91182c619494acf927d6f84164f1a0513c25c5ada672c5fed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX2474947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea89d5589938649de505cda0baf301cb4d876806d63b1ff4fd8bc86d8bbc023. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX2474948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087bd2b63e4fc500f0eb101c6ea13e4b7881e4d4270e1c444081553a079f3a6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303539a42596ee861b6c24590991f7ae2cae5f0de8ece28b7a5430362f3aaf71. 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/QZFYX2474950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b5117d7f2ee969185259378badb7eb5c98fcebc7ca54e1b6f7b4b3be74627e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2474951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77998fb23e5906b09e2d88cc04b4ac80b24d7a967b25114a0ac2c699c0975eff. 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/QZFYX2474955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b82d4111fde2a5af9b1494c5fc42e3582eae4f43bb969c95871d9670fd6a23. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZFYX2474952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37658ad6f92b269b853a6b6453fdc6f416aca1217e35120140ef52efc06be33. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:25Z), 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/QZFYX2474956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe690265fb664577f169f59f089350c31a10a5d5cce185fab5a7459640241ef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFYX2474953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424e92a71eeb4324d5a3120ad4d67cec1e6fa8b62b6e9bb0863e064f1b4c8336. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFYX2474954.