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 0x1b8ee43785c98bd4aebdc09056bd90ab1b1a9ab2d63272c77a9857917fbfa18d. 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/7f47f49d-6122-408a-8a05-344570016bbb.json and https://artists.proofprofile.net/proofs/artist/7f47f49d-6122-408a-8a05-344570016bbb.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 0x36823a9b6ca0be7f42339ae76476c6f434f68bfe0b49feab8d004b38421b7f19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P41938846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334aeee5ee1b5d158789d58289f14c2682690837ee818e5711aaf20e5c25ce02. 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/QM6P41938850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e155396f0040b5adb369b3b56cda1869a82e382089ad95d5924a77de50e91f2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P41938851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88379e36dd45b224fc2b182af5fad64996a4fd60f536035b0616ddeb3ab64fc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QM6P41938853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470707e9e58533cf60103e79698615be9da816456539c4e0c2e37e2cc4de13b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P41938854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d02e54129b9f37c8511c6c94cd8a9c664046faf9cc5027daa0caa823e9b49. 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/QM6P41938855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc430a642a7e53593df36cc40035735a459233065a1e634755b1bd97736600. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:26Z), 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/QMFME1918031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26fbc4f85a00ab0909de5e2d6d0d9dbf0c1b9d7ef1f0392a57aafdf1e98c3b9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFME1918033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd700fe95300df9eb7e2c9edfbc09128877f58ac633f199fc87144839b33f58a2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TW2252705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e58e9c35f9c08e75489028cedf866416a056f68e59ca38b2b56517cf77c292. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2252703.