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 0xda1b4c234943117a8ca798d70ff43d7faec80347874c9627a3e76ebb67629fcc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4808a73-98d9-45ea-b856-45dfa4d22959.json and https://artists.proofprofile.net/proofs/artist/a4808a73-98d9-45ea-b856-45dfa4d22959.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 0xaa3bc8f8534f19972f68c2cf5ed4facb352932f951c64b86e3fdd53f309cec16. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:59Z), 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/QZES51872794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc970ebf1c128c15e399d0d2c2fe6d33d33d68cef4a32461d0f324c6eaffa45c. 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/QZES81921916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd663ec0ff419d364076d109199a82930e5f49519c450b55b390cd3af6878f. 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/QZHN41967376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e5c77bdede0e96392f6067baaa894b4c98483b6d9e8ac83b91e1e9df3cad9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ52039560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005b09c99386b9c33b5743ee190997ab80774876501f6c1ed0b396f90f7c1929. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:56Z), 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/QZHN72003113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c071f740c8f981ff9518cee391b7afc5936dd23f3cd20b742676f093ad473. 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/QZDA72165787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96497942d4c7e0afc432331ec8975f32c516ee370b7bcf09baa400dc4535ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812108752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea4cacdafe32870a9597a8ad03691a5f75bf99578ef5b0cc6d45f468988d07a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHN82261501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8e416a544d178e35343101f80e1c4920372ddc28c19cef8488b5560826014. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTAS2290560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab329af425068460bb70e16413f050324ed833f9daf5775afaba5417d5c881. 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/QZTAZ2262256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78454163f8e45767c0f38529bba52c5697fac71373e7f04701605334db6ce2b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA52369996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab149c0f857cdb884fb74758cc147c249eba3274a9cba94af0af534e4ba49fd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZES62310228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c731e1820614de7b64c0cebe609967cb6c83f34945d80a3cc3a92087bbe4f9a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:15Z), 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/QZHN72320333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0f7ffc0187d7002d463898face2787328ecac2b9b278d78f853e807ad29f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFG2418654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee30921486fbbdf5a5a91b2d1c317d1dff57103dedb31cd07e1d267f19c807. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7M2450738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc133f399baa210ea72a1fd3bc7050016bfed025017897f097c3865148e270d35. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QT3EZ2489613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf686b8abe556e02255f2699091b6fedac5ddb0ba2445ef6f1dbb76ae54d26c1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYZ2532340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d036a21c1458bd16b4e2bbc195db78b2357d2d530d56d3e230404404ff39cd. 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/QZTB52481424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e3b3fc1697255e024b885ef882fb343d32acb2c3fb3b663215fcd22fc88969. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBD2459660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f35fbdc562bfb0fc33eb35d494edd85e23f4cd81f41c5d6fd9e664de66d75. 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/QZDA52559934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d036a21c1458bd16b4e2bbc195db78b2357d2d530d56d3e230404404ff39cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB52481424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe096d38ce668ab0562a1e8bf0891db8beea4a47ec9060d65cf53673bfa5ee5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:08Z), 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/QZK6M2524777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8274fae37661eed5395282c9c47f558f903e001b83ac9122914a6e3c5f4afba0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFW2437458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf686b8abe556e02255f2699091b6fedac5ddb0ba2445ef6f1dbb76ae54d26c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2532340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee30921486fbbdf5a5a91b2d1c317d1dff57103dedb31cd07e1d267f19c807. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ7M2450738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0f7ffc0187d7002d463898face2787328ecac2b9b278d78f853e807ad29f7. 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/QZWFG2418654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab329af425068460bb70e16413f050324ed833f9daf5775afaba5417d5c881. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAZ2262256.