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 0x444bbfbfb6010eb001489955a2c877589085a8466913ca417a806cefa535053b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abc45278-2141-4eef-aeb8-13a6b36b12b3.json and https://artists.proofprofile.net/proofs/artist/abc45278-2141-4eef-aeb8-13a6b36b12b3.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 0xc1ae1ba3d531b2f7a7598a37801f2b34d8562a6bf30e9ba6b1698271ff7d0a22. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:57Z), 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/ESA011873687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4aa7dba68474ba4a98b87e369334ecf3d6b811891d416a3c5e9eb59e70c97c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA011873686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdd9afddb43bb6446f5aae68f017172f30b6a4e09b05aa4f6049c67b0a50b32. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA011873688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3057664b1c41407dbb20cbf8f364843685e4f2c92ee9e5ec11a67c52bbefb18d. 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/ESA011873692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832586e57693c69fe3fd637277749f7201eb372daf8a0bffe51f5aa1bf8cfa41. 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/QZNW72360038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24244ab4dd8e7a69333db407849724390ac2dcfc4cb6902fe8c50200b512709. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNW72360039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cb7da2aab1e397356e19d9741d89da81bcf76245879e0e839582e47737962. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZNW72360040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e5448d1ceb91e5b68d60054363d6aae859408e095856ddfe9775e99d1996f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNW72360041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f15df4bbc6ee59f5e7fdfbda348dcb50af2876730b3434a0399ea48d67263. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNW72360042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c2ba7236df6fa1531cdacddd0a65345af14041c703cc9d174622db90fa713f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:27Z), 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/QZNW72360043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706e3c67229892a6bcd799f33828172767a45dbfe2802320ce8974369c7081e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNW72360045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b69c95c96b5f4726f7a1e8c1ecf279e4af794dbd910365227f34f38f47c19c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZXLZ2373908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914399235823698452c4742087a5197550de88d734f25b4f01e20a941bc280a2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZXLZ2373910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848941b2056ac44e2cef6628f5a108a2207ea70ca50fbe59630a8f006a77b30. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZXLZ2373912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeda742b1ba7c483ec2caac435d794b8ef0743d489b0615e6c8ebb766f3ebe05. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:07:25Z), 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/QZXLZ2373913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969606d6fb4d5aafb6986ce2d271e623fcd335949c648f8e46291998110bef5c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZXLZ2373917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73c31d68bd8c64f322fa197aaed0b0dca61b51eab875ff11d4c6b65fad415b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZXLZ2376135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06977f69c8c4a0b6237d9c6c6cbf0234377b8bd647e00955cff566b2c88621d2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJT2544214.