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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 0x1a6edb251fe8c887bf299f6c82b5056b2eb9df27c3f7b71a3562e3c67473d1fd. 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/d7467a59-4693-479c-9b5a-aa815490c833.json and https://artists.proofprofile.net/proofs/artist/d7467a59-4693-479c-9b5a-aa815490c833.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 0x6be3a606570074db5bfa2d0bdaac94d424e56be55442d096daf2232e32da7d06. 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/FRIDO2310316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879b1b0f4af32ab2d0ac1209eb8a88c023d99ffb7c8c0dd5776091fa7cf6785. 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/FRIDO2311179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9088d2a0ae3575c458189e51bfad896aff7d342117940e1396cb2a429bbb4a4. 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/FRIDO2313984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589c70162262fef3de55d90da341dffd110bde030c3edfbd17c2be176452ae09. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FREMH2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73edcd5093118b4c724e30fe4068f903a4c762bdd21543202899f6bb34b41a69. 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/FREMH2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d9fbcda6a47cb093a50b09758bbcd0f0da77a4a4f9de1849eb9fe19032dba. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:55:26Z), 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/FREMH2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47736b9bfac80d2af3e92f7375720161f7e1a473d255f96636e6fb03a8420a56. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FREMH2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73ceb978e502f84cc7e91f91708561921559952c256aa655f2c82007cb15b4. 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/FREMH2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d9fbcda6a47cb093a50b09758bbcd0f0da77a4a4f9de1849eb9fe19032dba. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:28Z), 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/FREMH2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589c70162262fef3de55d90da341dffd110bde030c3edfbd17c2be176452ae09. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FREMH2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7724139405e5861c74e897c29a529a62f7e6c4839f3b4985ab07a5b800010c17. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FREMH2400040.