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 0x8e2242490fe860d16ad04c601d634ddbed20c3d876c8595a47aaecd6aaecb601. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f33b06e-b396-4197-9c1f-76c3708e8d2f.json and https://artists.proofprofile.net/proofs/artist/7f33b06e-b396-4197-9c1f-76c3708e8d2f.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 0x1cf85ea0883a681a584ceda5a340b8751327e95db0e6c121a42b368c33d584a2. 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/QZWFK2390811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d896b902f81678298c85401d153d6ffb32e4e37f6d923e1c4051a10e24a32. 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/QZWFK2390812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115f6696b2b092d7fff112c80af0b843a24738b35b175f03359d5671ec8f2009. 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/QZWFK2390814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a07484c472981bf8b3d6da2e9ccee1c0d6c6eb1fa55e07ed7f6de12fc6853. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZWFK2390815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f34cb2dad812e6d1665f1d3aedb35668ec3051d27e66c70f5954d5d36e7bdbc. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHNC2348996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814ffc8d61a7d2520fd43415d7db9c37521fd7ba64f5c539e51933f06949d46. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTAW2310200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf9bf8f0b91f86b1f18e2200d0750835a2167b4e5a684d0cc85ffb8896e32c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZK6F2034748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ef24317e86120ad0e2d5cc210d3b473e7653a1a61fd71d525a3d2de887aaf. 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/QZK6F2034749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33a87a19678b72f4be593b9b97129c1da026eddabf1889d694f466d40cf6c7. 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/QZK6F2034750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa395d7a6e2620ca586d29a2e84b95f4461df2364e3889d3661f60a51fdba8104. 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/QZK6F2034751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2262a57b5498a1a239d5e865a2187357163c8273e7d7867524bf92a25f2c98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYX2474937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c394f6456f0c20be219d8ff4bdaeafb19f67aea75150be00c3359e40e17dd3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYX2474938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d4eb2d764855583fd1c1496ca659006c05880d858d31e6c0b071b1d65cb3a. 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/QZFYX2474939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30e14d9d612ae0534f2744430b2e41076d65f1279d9f52587376cd524c6562. 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/QZFYX2474940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917b121c07de5139698812c0154f54c6c7518f82533f4b9e7c2e0b14132a2a4. 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/QZFYX2474941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc982daa06c1733e212d8959a44b168dd6ce921f481fddbaf8f5ca83df4b13b. 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/QZFYX2474942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d9b3592d691ded88ff4db8d6aae01ad069d5c5eb4fc37238298cb1ff78fb25. 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/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 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/QZFYX2474948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087bd2b63e4fc500f0eb101c6ea13e4b7881e4d4270e1c444081553a079f3a6c. 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/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 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/QZFYX2474951.
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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77998fb23e5906b09e2d88cc04b4ac80b24d7a967b25114a0ac2c699c0975eff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYX2474955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37658ad6f92b269b853a6b6453fdc6f416aca1217e35120140ef52efc06be33. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZFYX2474956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb6e73602e27d828cc4857a5b5a180bb424e3f6522beb71bd72e2713805df5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FRX202118187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a309e53434bbeb9a75c140c828e7e17ff8bdd643806f1aee985eaa926fe714. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R2131748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a12c29f194a0b46e1bd3007e2998444c4e2f23d4d62adfa67c3154ea1b7bb76. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX202118190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ddc3882cc2829a32c8c6e38cc8510e260810d5fb7013010bcdd92f2e6a805. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITNXV2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f4a1fc513da1ef74ea9869b8ea64c639684c17e4b33c4492439211df333dd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZFZ42008481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17feb2e30c7eb3796f125168f226a0217a5620f92f949cf9afa15cf095cb2d. 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/ITIRH2300021.