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 0x7f8e6fb788a330a8dc4ed4dfb23a9cb1f81fc44e4697f9273a169f2e04bb502a. 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/d4baeb75-e6d6-4fcf-8ef4-8ab9d2effe7e.json and https://artists.proofprofile.net/proofs/artist/d4baeb75-e6d6-4fcf-8ef4-8ab9d2effe7e.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 0x340273ebdf6c9e1efa1f77bba5f541eb7c94311010829a6482ff41eccd552dd4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P1907500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024514b83512e02ccf08c94e12950590d655d0f4b455f2a3661d9a1b909b0ee. 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/QZK6P1907502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9759840296b041d083675901a8f531a22131f620433f86145132aa1536b9db6d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:55Z), 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/QZK6P1907503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f14001db0ade35d3d143159d266d311fd978a39ebf2a332bfbf918ea16c96d. 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/QZK6P1907505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6777ea9110d57bc051ce47fca3234181246c9d1ed82f6b54c4e942cbab9396. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZK6P1907506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dcc6c8e0cc086f62d32a852da4a8af6a503d0e5594d43cc49df2cb1417136e. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZK6P1907507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa93b0df9446dcb4cdd3e9b758c6773df83e78d1cfbb505b9888db97844118. 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/NL4NL2214244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99cbdb7094466dcd4eece7a46844076a89e9b04350befa183b45e871a8e0c23. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NL4NL2214246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a351da1abef6931a844804642f9ff323375c1c42ee83e7e77bcb8336cd75df. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NL4NL2220719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4238afa9f90093a19ac063aebc71696720a12c1893b3fa0f3fccadb04faa31cb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL4NL2220720.