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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68c5e630108cad4407d2480d976ed87c159a082e0303b9f0b988c3746fdc2c0. 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/65b92317-297c-4155-8e88-282168ac9f04.json and https://artists.proofprofile.net/proofs/artist/65b92317-297c-4155-8e88-282168ac9f04.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103aa7e593614553788d7d54f8e43b5464de133045aac4b8db9c4a9e96af97aa. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GX8LD2237357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf8445c208d5fe6ecf47da15401bc168904497aaead33d2d55c46092b0111db. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX89G2344288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586b204ffcf8a63667694499e7c90d5397a0629232c662ab3699d512c5c6d2f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/GX3HH2301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2d12cf0d85ee0dd260b337af2c486407d80a6423e8db2a790c8037b811b908. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX4R52320059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797f8e96972d57e9bb9a576955901aab2ee7bb2ae4649c16f03b04637a394e8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZFYY2465733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a78670ad2ebf2701fc8001109a57ecf9e8ea1f3a6f3a36bc92b900c742ea4a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZHN72497173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63bf946b5d2386a437c233d6ee496ac7cca80f9a43b342395c1d2cfb71b845b. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZHN72497175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7057652a2aa475d79bdfa353b0c441038b2a04c462758f5b87ca3cac54376964. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72497176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd56a308c0871a562bae6a2e279411b7a73c238b29b5a28b3774c688bdc51d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAW2448673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5243a9dc90c9f956e4c826ef11e8b83536e688c4bd273dcefd29805d2d94e2b2. 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/QZTAW2448674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df9a73c9321313704d36a212850b1eb533dcf5e5291b06d0be0c7894012f1b4. 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/QZZ762406831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d57c4c51b444d60ee8946458b330bcb5b6e7668b9d4922435c047f173e1f5. 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/QZZ762406836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc2031226d07e34b130cd70a38d7b7ce3ffedcd7a0169c87b164735d2bb52c3. 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/QZZ762406829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04db8b9789114685d436c271e94e74264c1483019da72736c856ef15478373f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ762406833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71221b9ec127f41c714c30259f82bebae59cac50747d19dfbfd309d6d5080d08. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ762406834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f98324be0a07cf218fb21182f84b4919ed4d100217f5b945353c6bde79b91b. 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/QZZ762406835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d6359fddb72ba336bb526b50778dfb367396f47ba0169f32fc7b9c1592a471. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZZ762406837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385adae9ee1399625d41fe8d9a245fa120c63a78378a48ad04c224ba8859cd29. 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/QZZ762406839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047c004adae4239da079d320a0a41d258767a82637212a8307b582bd2043298. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ762406840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559c5c8dc97b97142413c50ba5e80b861fca3c90cd6bf9f5d93292573fd51384. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTLA2585182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7db0dc49dd2ca689055478539e940ad23ae9237e5a9ddd6bedb04ef8c620c. 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/QZTLA2580422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cd52ed53a089d110a8223ebbd7d2ccc4627b87fa143e1e7d89a4b798cbfef1. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZTLA2583925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bea664ee793b341cc1ca408382aa38ec2ef1db1b9bf47c986113582f11953. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTLA2523862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f7fddc52b3668f3036fb2d57a10c702e285fd3f457bba8a7b8868a68c8f04. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTLA2562323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82400510c73478a8c942d4384a8b52f3b723baa450fe44f5a798cf166414f96e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTLA2542908.