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 0x8aba58f65849f810ee119acc5c0fec66c859abe8cc88c8015db67cb217f674c2. 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/0aa78ba7-6351-4576-b853-407494a4a003.json and https://artists.proofprofile.net/proofs/artist/0aa78ba7-6351-4576-b853-407494a4a003.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 0x47ea55e7a69d160f21fce5df7e7ea2bf0a4a1dee168709448bd8e4776034e23e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NOGTA0443011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6138714785243577ebbd576b94cbb4046bf48b52434ffca810f07b9d699faf90. 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/NOGTA5829010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71aef644c650013e29903cd60ad0155fa4bf7dd28e16cf8c92be355097953f2. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/NOGTA5829020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b754dc8b848577e4f177f0d61fd433c73da9528b8b492ff8f5f75fc92f5a0. 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/NOGTA5829030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df8165153b685e80c8fa548d393f9ccdfe41101a493f9227a3e83397ae93f78. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NOGTA5829040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c5605d1796632b7d1772fe974eeae5f70009ffe0933bfdb3bdd6037d27b4d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NOGTA5829070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8571371d8daf6710392d31292ea6298c563abd8f0e79057e83dc86fc72770502. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NOGTA5829080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8bfefb2cf31412fd2ed985fc2ede38b8d21a65071bc3b01c2012fa8f337fe. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NOGTA2358510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8bfefb2cf31412fd2ed985fc2ede38b8d21a65071bc3b01c2012fa8f337fe. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NOGTA2358510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f89ac777674ca76974b65a412f9ac98ee0d6f8e664a0ce1f412b1d35b3966. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NOGA52301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280ac8ca0f11dddcb82c8a16fbe22c5861892dc33f904191671fc55ce548486b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/NOGA52301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553e0fca69aae4192f762b8973445b78653bb991a438cef61656ecad1893fec. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NOGA52301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8bfefb2cf31412fd2ed985fc2ede38b8d21a65071bc3b01c2012fa8f337fe. 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/NOGTA2358510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fc03fb388916a27bc1e5a93ae2b45e5a589979974e9863edb25a8998d2d4b1. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NOGA52301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8648fd78c05301d842d6195b2949dbd80fb5de3d9e140782b97d07162d35744a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/NOGA52301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a9fbdfb5b8d8fffa0021a57a269adfa207896488d09d7d3758ea9e774efe2a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/NOGA52301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a5370d54ca2dcbe102a35e2f940d2b65da40b2c03a5ac4f52ddde4de1c254. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NOGA52402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74251b9608387eb85590bf5c5774414bd5efe65e9cc2f3506ce14a67d8052306. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NOGA52402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5161c48670a5c26d3c980b0f8f3922e4f1d4169427ba45092226559182070. 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/NOGA52402090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a5370d54ca2dcbe102a35e2f940d2b65da40b2c03a5ac4f52ddde4de1c254. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NOGA52402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c0342b126a34e0ab37dbf45cb84318f95f6ef9945bccc30ea4a50370b9811a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NOGA52402060.