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 0xc4133157229f03e25172142c5222d99ffa3a5e482b0d1c408a6c6285714c65a9. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a2b5711-180e-469e-b7df-ae17c57c5d79.json and https://artists.proofprofile.net/proofs/artist/4a2b5711-180e-469e-b7df-ae17c57c5d79.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 0x283e84d253afa3b382682549a9351ba3774402a31700aa11c24d9c9d7644b4d0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR33T2011401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab8f2c239eb2db7ce769fcbfc7a54ac18221b09ac7e0182d3891800c6a3573f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:58Z), 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/FR33T2011402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e3250a973b8a03a586aff27c3f9612c7ea8c7feddd8d1c9f30746bc87779a. 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/FR33T2011403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd06e18f28e9fc3476ff1a0c70474c2d47532940d59aea310e3c1768a1ab34. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJW2502769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f93065f9ff8c1b3c27776275a3ef53f02ac396e933e4636d334f9f7e5f2d3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJW2502771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465af5e98cd56124e798240149fec78ded7c38777481e44346b603ce4846dabc. 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/QZNJW2502772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72000d1783088997ee81b978d1c45cf696fe555fbac6ed8a954a7e3f4ca416e1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:23Z), 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/QZNJW2502773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f7e0a709a5c4a46b5bdea57b0f211de18d43e1575cf821e8eb9740ba6524c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:59:58Z), 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/QZNJW2502774.