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 0x2533bca616edf0303a6ffa5f13feaa7d3e082f121ea7d165e92d0312ca2aaf60. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/449f5984-887e-4fcd-86a0-a4cbdf61b087.json and https://artists.proofprofile.net/proofs/artist/449f5984-887e-4fcd-86a0-a4cbdf61b087.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 0x8747f86fb24216f466f5d41196f38472c561f2dd43cfca0016f3d8cb71cc7011. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZMER2096632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f735440c40d4718b238bc7ec4eea9fc9951c5344701038883c90e719277333b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:31Z), 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/USUYG1445579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e01af8abb6dc52c94e1cffc42170d9a5d51101af88ef31c77f39298512a126. 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/USUYG1450051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5267f8ad6f57c473db82abe836798080f281a4dc98b0856d34cede46fb5ecaa. 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/USUYG1465384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae27f862b25b3c21799183205302051c8e84f556170e7ef13b100a84f4fc2f2a. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:35Z), 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/USUYG1497697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b1f2ca5dd3d6b168c5c697557a7293397571337cb6d4a877e54ae654baf45. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USUYG1512376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9cc16bac86612b74bbcb29eddb56d9b037cc24bc1d712b64b11105ad1594c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:22Z), 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/USUYG1537740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05674016ac12d9135ec49751f52777078284531a1aaea7f56c12777f0ac3d45. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:44Z), 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/USUYG1561957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953878eaa5ec6501ee4c98a2236d91149c2c9c7035be52a38a57536e399236d8. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:09Z), 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/USUYG1569139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6571ac34aa327c754c37576c461e0c30784cc4f9e2663a03e23ae8555869d171. 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/USUYG1571676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d4782a796b8bf6d69ceafd8dcf367fbe93dd41e0159dfface247a8f70b01a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:57Z), 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/USUYG1581303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb934540cf3203efe57ba89e86bd17379cff25b58661bab48e8b4601dc74e7ce. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUYG1701174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8ca9f2b3ec08bedfa0ec5c2b44b2fec7565f17804519d1ffc77bad57897d1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USUYG1710254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6627a3fe6121105f8ee9ada6a954a1299ee300cb9415aa2c1070dd94282ee8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USUYG1719343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2006dd03bebb0e1e628d5ef2347785d6241f05267ab40471f8ace94e8c33919c. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USUYG1729706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e8153ca9ff4039b0bdf877f50ffe51b17012555a713c3e73bd7bd511fb329. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USUYG1743587.