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 0xe6b271c1b53ebfe32a8291d1820c06201f0504ec40b98983e33f5eadea9de42c. 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/93ace5a6-90f3-4729-81e7-563168555e78.json and https://artists.proofprofile.net/proofs/artist/93ace5a6-90f3-4729-81e7-563168555e78.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 0xdd3cc59f5cfce1bd39bd8b73134732de9e17dc7b129931c4959513956325dde7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HUA611205071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211654c452b0e72765622b2b58efb85db16165549df8a5facf1c009b906a05e. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/HUA611205075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2cca8a66dea1f460384aa330d7d81b52fdff80495e3e32db53758ebd5b4df8. 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/HUA611205027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230aec416d103ff4a3221c221b13bb32f04e901ab3f518a3e3e9812bce2bad1a. 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/HUA611205030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac51222f6fabc53a2b373bc1534106e2fa71925338451c2fa1583563dd5a48. 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/HUA611205046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe106f7177859a0046625c2afab976e6246620689a0a955f7a9ec3b255874d. 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/HUA611205049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa02f6ef7c285bb9d159a72c451b2e2b8dfecf2c7284f7ad8f93e7a0cb4ad6. 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/HUC891770101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8cfc38a07be75e8e8ff76b22c0cd3283331e3b590a5418884de091aa1077a. 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/HUA611205057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7652dc431f2f56bffaab30cc2feca2804a9f15ca04879a6eccecf1998de433dd. 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/HUA611205059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea3ed6ecb1d2d411765edd524cbd93f7b7e6667617d1f987e9d7e939e2185b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HUA611205063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05581e6027bca88e73bbaf9dcac75ecf448d294b02eee035b3166090867979e5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HUC891770201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07839534fdcf630a40f9e3cc6b03e4274f974fb6aeed86b10429e4433e62bf67. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:09Z), 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/HUC891770204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6693c51ac56537ac3a87d909c8f76b11ee2a32957e3059c4a8c23bd87987c5. 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/HUC891770302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e700d799bb54e3742c66b6af6de7ad2353521f7b2ae12960e93261b37ebbcc. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HUC891770310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55fc72aca9046be6f7a4d5394c6097b8d30ca75eaac2ea9527a1bac53a961b6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUC891770312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8045a926a5e89d1de5f7285885c9ab10da130c4e95347a72e7de758eb795956. 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/HUC891400005.