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 0xeabc5f2a3e60666e0e042b15a1ea590897108c6e64abf61f4687b313ffa9fd33. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcd21d30-59af-4f24-86ef-12222e5ce26b.json and https://artists.proofprofile.net/proofs/artist/bcd21d30-59af-4f24-86ef-12222e5ce26b.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 0x7a559737d648bcdae9d57306ccab42c2e4a098c4423ab5bba89183add6e7647b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SGW502554289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc76db9987e6737885c89e5bb80010a3e9cfe41f0f4e6754f2071848a87cdd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SGW502578247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f43d887b30674ec16ed5b9ce77c179ea7567a85c11e062dd41bb3524dd121. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SGW502512579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3616f9117e8615cca06818dcf9f0b0206114a5cd38b9612e3b43ef3a8463d4b8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SGW502586418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f31bca5826693abafda4eec934fdf5eeb3fe2d2e353365e2bef628274983864. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SGW502587320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6826c109cc7e7f39973cc21715d41a1394f8c2f55c6103ec2b7217a5f1fe088. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SGW502539648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe00cefc68141d71935f3b653cb870972d1baed50f84ea0ef0df4a4324a7d817. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:01:36Z), 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/SGW502584179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132bb15798e83c13ee5badebdf8b91462ec1fea4ad31f8dbcb7b7d90d2fb93f0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SGW502580392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185c012aa39c5d056e96aef854158225c6a1507db92ed862716b89c6f6a3e1b8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:20:45Z), 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/SGW502596488.