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 0x0fc9621acca22bf570a3949f98399e9dc928dfee1a55fb547a4f4dd7626d31e0. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9c31fe6-9946-4d41-bf5c-f65a8a7565bc.json and https://artists.proofprofile.net/proofs/artist/e9c31fe6-9946-4d41-bf5c-f65a8a7565bc.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 0x0846c997e3f9cef71780549027449f86ec97b58965083895f94c15678bfe66ee. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:21Z), 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/QZK6G2166496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7db69380fcaf29b29acd30d39d99a15f3c06c3d3ae621c12ffdc7e5f18fc63. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6F2300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c968cb9435451a1e594479f6b2d2c4fbcab2d7efd830b77c41018e213b91b96. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFZ22405152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288d6825fefba9be208978526192c398290fa31ac9be23d57be4f8c9c3c1aeb7. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZES82488907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e858a603eb68aa0d4ac8610b8335fa9c8f0f0383ea1573575df66bfa91ef8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZS7J2467202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2394155318c88a1d67f075a45830add3314a07d60877221272bde30b81a44b57. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:26Z), 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/QZS7J2453766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdf13217646ac8d40a2840e5386aab6ec2940d7b3b41b3548216f811b06a5fe. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZS7J2458340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4464a729875e22b9afe55a6e11b3478d9e2798fdf10176b410cbf357ad461c1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN72549152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801217b21872ef1487f641e49ef415b0413f211798f1eea465510c8bd89b3c8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6N2544640.