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 0x70acbbf83686b3511cf5b856bd2842af861eeac74721335c42d822b29969af6e. 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/cbc1f209-43b1-4aac-bcc6-5e17cbd2d065.json and https://artists.proofprofile.net/proofs/artist/cbc1f209-43b1-4aac-bcc6-5e17cbd2d065.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 0x8491e24db304e57b010ba059ee0358b4f6708e00d0378f66285f62094d3370ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNA2215386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3741c5c3212045f976136093ef29af5c0d064636f88bfa0f9ebeb2fb1513fa48. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2379106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98835b88858bc258b544334e5ef8122db43c61f65835d6d8a5823c51c52f4166. 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/QZK6P2408070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a22f93ba77259f309d7c5a8740ac9fecef878bc91e2f2e54c8219b4b24668bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2447764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b1682ff2137549a523350303a7fd7411fa03448a86e683a05a879e7d03727. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:59Z), 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/QZNWU2447765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947f5ffe68ca5a3fd672f5ce094c9cc4e7546c7a366b2c1949a4eda1c83d120a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWU2447766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a77db3159c278e8983faaaffdfaca8dcc74f0fbca36cd6e407f85dcca3953. 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/QZNWU2447768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a745d61bcdf61eb911373c107f7c351f614a9a27fc70274297be03f8170d2. 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/QZNWU2447769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b28ee1261836d75246112e159c4e2260eb7310d2d27e4974b56cd0032e2d24c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:30:04Z), 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/QZNWU2447771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800958a618b97f1f29fb81f7f10eb9fbfe43b83b51e1cf6db2257bf4953fa850. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:28Z), 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/QZVEM1879925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac805ec9459844d0b70260e99a0f0af25f443e0e696fd4789d4ef482d4d197c2. 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/QZVEM1879919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06dc09a3f0a0fa7b19439b62073beea6c540d6a81c6d986bce3a11b751a3adf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZVEM1879929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343f0c655d77f07ebb2b1470c7b6fd221e90848e1cb645495a7a54dd6636924. 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/QZVEM1879918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb946eb1826578d73784be7df45461cb639b176f4cf5138c7ddce947c78d36068. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZVEM1879927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f8e8636f2fb0fe824b3c44678aecab32b6eae5749dd589825c334f68162314. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZVEM1879923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8a69979e9df2a54d3e6c2f543643fecc6118d985a7018451dd40bab1d959d8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZVEM1879924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1684312ae0a3a7f6137efb30da79c92e000dd550f6bc085add391b5cb35c47b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT4K32526327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34635d176b991129fd32b18ac24e2481fea174f9803f309b073ca09d450eb019. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QT4K32526328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844116f058054c91d15dd38c9b4b36a47aa7279be2d0aa03d4ca6c9c6c087da1. 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/QT4K32526330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bed9939598b75b2285178c0d19d0331fe96c81c8096e82465724418509c2f0a. 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/QT4K32526333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbde0e664b1a4bbfafef7d03a9ec5fdfb493a5c83711f80feded5ebbfb81de8a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:02:17Z), 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/QT4K32526336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583731eea4bb8d76e4055ad08acfe37ac2adc23f7d45aacd4ef72b8bfca3e491. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QT4K32526337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a034023c7d561ee54254d0d1106cf37d73be446e531d402883b31993243a3e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:32:47Z), 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/QT4K32526338.