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 0x5279deaa8da9d7d3ba9c0c142d5edea55eb23317598e155b0e175e478d93aeb0. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27181501-caa7-4a76-b4f5-b623f6fb2ae0.json and https://artists.proofprofile.net/proofs/artist/27181501-caa7-4a76-b4f5-b623f6fb2ae0.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 0xa4efce4e26d8985cdcb0070f73c5e932b5c15fe9f375c8e0a9161e0ce7e33983. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52381305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6debaad126773583735a5ac31f7531991a2ed7ecce1d226c25e10e6a98fb1f. 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/QZDA52381310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2fa024cc935ff49211b484cf9df45122a3ab8bbcb41e1b551fe4869b991887. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA52381321.
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.
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 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 0xd7bdaa4f5e2d832fdafaae954fd808ae92469785a47ddec6f61dbbddb1773f53. 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/QZMEN2357660.
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 0x32949fc001e80dba44c2e10102ff6f36dc58af79957f92567d3878c34fa78533. 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/QZMEN2357666.
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 0x997245a473e0d8a651844e73fc18acb2a5075941983b69ad31b159048dc26b85. 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/QZMEN2357668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00fa062b130a62cc71e8e4fa7199d3b98e4ad3333e7c8059f6d9d629b255091. 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/QZMEN2357669.
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 0x8307bb08fd7e529fbfb9648ab75f3fc86a086581b42fc1a55c0f2e8033cc5d0c. 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/QZMEN2357671.
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 0xcfac4ff5b80a971792d2487b4dd8934e024736b779d7593a7689a166675a9978. 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/QZZ7Q2401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb278b0d3fd7412956b04546de0b9b73ed85cb1f559878c9ab653b5180385dfd7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ62522572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab794a0e0450b16730584c616417ae531d9b585e209e6256fe8cb7a28f6476b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZFZ62522573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ef302ef830fbfdd2e547d600d511140c347970f47d544426636ac5bfb74f1d. 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/QZFZ62522574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f57fba25feacbcabc84f3405c21788682a4693b0dce88f22c6fd19c4dbe2139. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZFZ62522575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3abdcf61e01d502424aa5762c85b6e9870dfeb47787deb1c56edf6cf7a9ae15. 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/QZFZ62522576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9daa9b9212e8a4fac4659a6e50dc619a9de8d52d80586befbe75551e1e4aec. 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/QZFZ62522577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628dbe2c148146a7892a23e4cd223ab64454f4b697cfb4b094a46979c07a6c3c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFZ62522578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73108003a7ada714cb5760ea11683610d0469fff50a6771bf9e3636fe0c36f60. 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/QZMEP2377153.