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 0x771278b0493a21b0ac83f429c4b770e03aa2e68d6aa701baa0374308778c0e82. 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/0a131617-a15b-40fa-83cc-572d1217c226.json and https://artists.proofprofile.net/proofs/artist/0a131617-a15b-40fa-83cc-572d1217c226.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 0x69a60307742233b2299f88d963a45f084451fa0abbe29f15e27092c2e9cd59fa. 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/TCACR1635147.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce80dff78d737c11ec6a57baa2167662086b20e637967b71e5ca99af0b8644af. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBKPL1784214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae50f7f80fa55a4072906b309fc71464892a288fe6e4577c2e6bd1ccdec8e5b. 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/TCADS1884795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f4fee9f69ead37c1818434ce3c401b14b95f9b6aa305a789e65e510a34e7bf. 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/USHM91947342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b5f321fe19c3d7eef6f9143ee815a580cf9538c829e2cb900421f537ec962. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USL4Q1918685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d61875aa2e4acf6c9cc733dba451fec85abab876bbaa72b30e6b21ebae40bd. 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/USCGH2055996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c01d805dfaf19aef4eaeefb56b66e765d5bce018fb4cb5746152fa4506c922c. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USHM22012891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b70177de01936edf863fa6f875f60306361a043253b3a5dfd990c1ec2e0dce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4Q2022094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f849fc7e0758003be83adfe74cc4bfe8c8f270c3c8c24b0437ddd98c726c228. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USDY42121536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39685480d3c90b9d16ddead85cdb15da7d2e5d1e9e1fba4ccf63c8b372533d76. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6K2191656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6e6f8ee91cd39346875e9444a7e8a233c3ce1bb41278e96f5be5e0a9a34de. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7R2454606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb474cb3977d4002a8ad7cc40cba487c6d330d41fca9bceac23dff075a4384a34. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QT3EZ2498681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e9670a41cb9bb0d9c289980975f7e9809441e0b5eec45d661272ce869d1141. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZDA52547659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c46bc8d185bd6685d553923f3cf415ba606bd8c771ba3368939d7d0a4b5f3d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6J2541419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e21323502d6dd0c7d3754d102e488b72a532058072a21199f31144dd6fa7ac. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZWFG2442565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3b7c16e18c81e072a3806073e291490042a239d897dd9adfab49ca2f27f427. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:33Z), 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/QZWFQ2567390.