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 0x2af1324efa4ad1b6a00177ac4c20c21e1bfdc014c12c65e81bd1a5c6c57f2ef1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc60a4c4-01af-445f-9384-abd33e56ee59.json and https://artists.proofprofile.net/proofs/artist/fc60a4c4-01af-445f-9384-abd33e56ee59.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 0xfbe10ca9ca0119cae27705289b476b3e81b611a5047162f013109a15fd7d4039. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAHQJ2334964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd516df11311ac25679c2bee2909596061c280a69af97514d54ce58f1d0732f93. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:49:56Z), 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/CAHQJ2334962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7194c73684402f0e8b02711781171badcf230a2890c1236766ceb590605ccb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:29Z), 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/CAHQJ2334965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbca76e89bf963b1429a8ed6e7e958735cf5b24cc94e1d4e685e7b2b2dfb39b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:43Z), 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/CAHQJ2334963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd657a39b7a8d94ce4212216a178d2f1e9ba746222abcaf54757aa291d703a60. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CAHQJ2371229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28c6e9bc948237b5e9055d8aedefc19808e34eae207904bccafd448dcf8cf1. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:11Z), 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/CAHQJ2371228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa79819d7d75df8c2558b754c2ef6ee5cfa110533c7737f92e8db1ae64d6a47. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:37Z), 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/CAHQJ2371226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b57ffdcb34ade855bee6b72655a1d9e281c4d700a8588bf6b575e26a2293a7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAHQJ2371230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe65f3b737c51d91810cb6dc847a5eaf4436442c264341e8a7744c3805f236. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CAHQJ2435201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa635cb592fbb1da227f7cd57a8b731abae15ecbdf22fef503ff3ffdddb24db44. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAHQJ2435202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4508df25b54df27e86c709fa6caab4a02ade1ee57a6d66ef7e5b6d38e9db67. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/CAHQJ2435199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a05678a7be748c86da10d2c3d56274dca16b27ab984a46ff3fea32403ca2886. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAHQJ2435200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279d8ec4b3711369952255f833dcdfaec77cb776bd43fe6c58c81f82e05b84a6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CACWV2468126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13124096883fe0f1b27ae1f06ec0ec041aa2ca671194c05261e4db7764332f8f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2468127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ce49a01e95db38f83ad43d1f35a025983730948699e2b4ede691f7c3954ff. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:24Z), 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/CACWV2468136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713c7896bc4c7d366146985848ac565b411f6fe58350708e9bb4ed1ad14cb724. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CACWV2468129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71120a8443942df4358684a5e4b366912bc284e8d0364732bed10c6c8d65a1f8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CACWV2468130.