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 0x945408351ac0e562de4dfbcafd1e09bf7097d3e9ff5f73c09ef19b9bcc3e74a9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9efe3d6-f59f-4e23-b4ee-aa5930261d1f.json and https://artists.proofprofile.net/proofs/artist/f9efe3d6-f59f-4e23-b4ee-aa5930261d1f.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 0x7ae911ea39636a07616c37064e1f67531f262bcfa0fec6c67d9990ec0023782b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMDA62333455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0c1f1bd6045334a650269b5202869b45573fe7030ba7e2443d6f9f63b69bd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA72321957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0073af7e0ab3be5a5e70f710e842dc3000b4c5236558421dcc244fe3a6e6369. 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/QMDA72322617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2401e6cc25e8466d47ab835aa369d4efa540a9fdbbf7813e1b006d419685a7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:22:11Z), 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/QMDA72322839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd45a9389ae9bbb5ed289460768bd01b38220d7a011438f5caee86e77325d9c6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:13Z), 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/QMDA72326818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6ea824d1288c403c05bbc87f40d3280c35d02efce2aacbf716cb88e93ad21. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMDA72326915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ea5a5d3be54eb0639e42fa694eba643090011cc04ed07a63da0dbd4412e4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA72343976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0408542e2749a27c40f0d5cd8fc98b7054d1611b25521234c6f820a2f7fc2e22. 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/QMDA72327334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d56cb8051a5fe861290f6b6bf24ea5883a17a5d2d78d58946352fbe1cac42. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA72344098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d18f71a8e41c410b1f7da4acf4700ff5ebfd5c9635742abc47a05aabdb4bb7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA72327435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdea2e09fd9c7d9726ed20d56428eb4c4701be7fc535dd94460ca11b86d09d8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:41Z), 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/QMFME2322054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89039f4964ccfe9ecff616a159dbbc82e0b4c2aa5f08939755482c459f95e10. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QMFME2350560.