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 0x991f943a7f64b6ba2564ff9ac0a6bc8b0261d5a57f0cfead03e13773c06537e1. 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/c10fe158-17b8-473e-a59b-545ca840bb26.json and https://artists.proofprofile.net/proofs/artist/c10fe158-17b8-473e-a59b-545ca840bb26.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 0x3eae656bea326fbb7dfdc821d13bf20ce9f32b590b61b848b7a8ea195b1686ac. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US9CY1300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0892711fe66f092057d7fd4e0efa2ae0bfd4275ecc68ebb419e28bdcadce92. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/US9CY1300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efc8ce706350676c1569f772e7e8eaf17fc2cecf49252d9fb566a3825cb4a14. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US9CY1300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11df38c6519184b49c37ab8999e1c46a8ee689f0a66919092abafecc3dabe0cb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAGS2234738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35598ee6507be5cbc285788bb07ccd1bd69194947a4e4b6ac984a5562ed08af3. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/TCAGS2234742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfacc78a117d33181736b720d94d4cadeaef93b9aa850c015183044989e2103. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAGS2234751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf8dd8c11d6b40bc38c29385caa33ba7e3df861624ee87995e408e9e8be007f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAGS2234761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284fdccea84a65daf59d2e7498d06f95da4ea7bedc29377dffe7469e1b03f69. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:06Z), 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/TCAGS2234763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bb151ff5dd4da710c4929bfee5310a5d8aafa77da8a0d9f5f5af1bf6e6a258. 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/TCAGS2234835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ccafdb6ba5fed4f0d6843b02e272dbe83d9a628d68c68202f268cfcccadfaf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAGS2234847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9009aab0a892c1aa1c8296fa655e899ed62a196c4f0f554854637510d05a22. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGS2234868.