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 0x2ba3e97d997bd45d9ad917a6d1d0ae1b8934048bb0f261153da26dcb130cf773. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cac41110-cc1e-404e-b0ab-29eecbda3188.json and https://artists.proofprofile.net/proofs/artist/cac41110-cc1e-404e-b0ab-29eecbda3188.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 0x8c27543e6fa9d91f6e971de823c6e50b8be6600b96d11cb4fb2578d8ea0fdbcf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:04:24Z), 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/BR5882100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f91c9d20fc99f75ed33cc275c929b14f77a84526d3d950e554f4e2cf4d3b72. 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/BC6MS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b117740f6b646ca648081e3179b12f2732434a389971df17b8776652bfd7c5c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BC6MS2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95978736ae36aa3c3459b556aeef8e7ab142be5c068d7a8b45cbbf8679d13815. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:20:10Z), 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/BC6MS2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c99045280ac6353fdba0961d41d3dd295a993590abb3cdae13aa69435d4a023. 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/BC6MS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1883b85e7be3d8da6d597269d7f707fbfa5503c266843d83cb132c2239cec1cf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BC6MS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad1ab1ab10ca923b10652bd2ca66ebedabf37c9b3eaccf3eb8a2e771ab623f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:23:30Z), 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/BC6MS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad461d1720fc895994778b90b738b895854c45e0f743b38bb7b3d3f9690a0c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BC6MS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820a9c8270d2ec7db93bd299f0fc6360ffd227f87d5241590562b2cec4aefd7. 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/BC6MS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b117740f6b646ca648081e3179b12f2732434a389971df17b8776652bfd7c5c. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:28:02Z), 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/BC6MS2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c99045280ac6353fdba0961d41d3dd295a993590abb3cdae13aa69435d4a023. 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/BC6MS2400001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be4bc3089fa48680cde1a683081d4f9f342243184ff45c67b4470224336a51. 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/BC6MS2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75fb762a733e7ed82c23ebebc92ffcc1e98040130a18b23cf4a66cd96b0754. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:34Z), 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/BC6MS2500008.