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 0x26a37a1a5e0f9016a923aad317a00f280bb40a220e9557f1bfb35fbe8b3fed0c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97aad2dd-e275-455f-b313-7d0d428b341f.json and https://artists.proofprofile.net/proofs/artist/97aad2dd-e275-455f-b313-7d0d428b341f.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 0x54c8df3c41aa88407a818e777bd6d69ed61e3445258ca5f766f279411fadcfc9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK4FN1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca1435678dc499ffb45bd549947c8ca223f6e8b5d5d4a2fe5b9db0f35b3c713. 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/QM2PV1518402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed35120ff4612bc723c25b20c52e35607418679c4ee6bc28d51caf03d266d45b. 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/UK4FN1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d211664130407eae61ac339d4004834e9b69f3c94cf7ede1f190f5601aba6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/UK4FN1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52be3d570d2727f9c723c88e2de71fcd6d457c94f19ad46df2b0d6b2853961. 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/UK4FN1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9887b25e4ba0bd042750858f332de360af5406a03e8f8bdb0a626d34ff20794. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:50:46Z), 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/QM4TX1836320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d90322bc52938fe7b8bc0a612c67053d128092c1d2398c38ff2f2c6a35bc921. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM4TX1836321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3fd84975387a106bb74b84c3a4c1e38f9e9ba7245d94ac9ecadf082acb32e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:11:42Z), 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/QM4TX1836323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb27651b377dfa26f6d18aad3a255469216e8eb3e43a7106deec078fb2d7943f. 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/UK4FN1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595db357e24b9fde11480194cab734e1406535bc63267c33fe2098a14da2b026. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/UK4FN1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb701dc1c8d1718773bb74b630e3e0c0114d1dc417c0800d64cafb0d051147f3f. 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/UK4FN1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f93be36a33e36faea4ca2ea4844bb07e500dbbc44e5716c1dc8db9e7b3d7a02. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:58Z), 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/UK4FN1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb52053d8291899717f07b316bfc358dd1a5b8a221afa7162004db25cf06ce. 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/UK4FM1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02309b97d8eeee8f15cc1fb1b5b7a96fa04bc6abd0059e2173c06e040f8e668c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZHN81997558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adeca9bae6cea4a8bf347b21c72c496d6ad527a57a6757cd58a92dce6fe3886. 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/QZHN81997559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec424495e5bbcaf70d0a10718f896232fa9021ec0cf3ee1e0d94fce25d3ade. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCAGB2264113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d01d1b6beb0885ab58e49eea83da74ec7d6f40f4e3b75cc17273536d686819. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX762532131.