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 0x56bd626d572378740bbdbbe3cbaafe1605977892f23b985e8bf42b0599b6e7b3. 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/60a2a215-8c6e-4c85-9abf-420450cddea7.json and https://artists.proofprofile.net/proofs/artist/60a2a215-8c6e-4c85-9abf-420450cddea7.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 0xcf3f8dafc7e322c4945a6b8dc3217f2ddc9f6d03a584a16611eb1d6cb471ca8c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNA2400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2a5d43371735cceed1d14c8b75b9225b2aaabaed74a4772c1787c34d07e14. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2400648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f1162713a9500c5590ffba8969892b2833b9065e81c99c5f319a4b7ec12ffa. 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/QZHNA2400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb71f959b232e863a7379284f155b2c453f48ee72ae3044fa47751a4394855e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZHNA2400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c64bbb3c1308222baa1fd7848f8be6344dc96805d3f902f23373de4da0501d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf5bf820ac98b12e0fd8fb85284e39c0939c470f3d45bf84d973dd3deceec98. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHNA2400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeb3e786ca11d11c21861c35ce3b10c15bf71e8e9686b66168a93e663567e95. 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/QZHNA2400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c286fe414ba474143dffb22e0c81bce788aa6fafdc5a1f1c6fe223a6fd5ec9f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHNA2400655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bb6855fdc8513ed956637864b61fd32e4f51d0d91cc3d9171cecdfcded8bcd. 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/QZHNA2400656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17153f9dde1248aad7af6420c03a002df5a23265ea44dc21b3726dfa8e021600. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNC2482283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819dcfacf61402847b004f160ca7bcb1aebdb816bb8e115da281f0ad23a5a724. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNC2482284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a40f95a0abce307b216df8b5b9f48181bf72814a5372e8e4254adae131478ec. 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/QZHNC2482285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e5163da2261c6c4c819045d5747799ea48c5ed25500aac3708ab6dee1f1fb. 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/QZHNC2482287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92235f416da140b771f416e37f358d465fcc3a6e5985e6845c3af6267604a2ad. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNC2482289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7112e004e2ca279a59ee2c4cccea5fedcd368fe219b0be0f1ebd6d51349bc1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNC2482291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7301dbcf1adb3e9ad062b0a87da305ed653512826304d201d007d32793678a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:02Z), 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/QZHNC2482292.