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 0x729e38ecd1806bce9788a1fe0861b75c63f504d47f2777f62d4b31f01784a883. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f9dfde-02a7-4b21-81f0-ad6b57dab941.json and https://artists.proofprofile.net/proofs/artist/83f9dfde-02a7-4b21-81f0-ad6b57dab941.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 0x6cc598b8c73ffc262d0e27de34d245b84c6d2d7e4f6ccfafda2578ac5c5350cb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ5HC2009701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e4d5c0cdc211598f585ac0acc8b3034dd8c4b798d3e5e5465b53d8d1b4759e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZ5HC2009702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5716f655a5c71e99e80918877481bfa7a48892afbaa906d4709161a88e4f9. 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/QZ5HC2009704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9521e8ecc42e1dc0b45698c1847f337c9d9cf90798893970520f9b20ea12ef88. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:01:00Z), 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/QZ5HC2009705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5630bcba212e64d3fe66c7bcc2c837cb4bba0d56c92344b37c806a9e02fed63. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZ5HC2009706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf92882f70dade20f3c84d265232ad66faafb77786da566c20696940121fb18f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZ5HC2009707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2301453290e7765b70bc1d11b38a59952499d78ea346e478f6c346b583905. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZ5HC2009708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997da57dee4980493f0e6362d6c765ed780d1a8acfb24d767dabee34dc213e65. 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/QZ5HC2009709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e50064062ad434ca838cb13fe3dce90b6c90759966182fbdfdb47bfcbeec19. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZ5HC2009710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c00809917811e63bfcfe578c37643e961291da4ea80c1330435759fb94fe40c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZ5HC2009711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458749949eedcc533b3ad998a03cf68a388cd01e622631c75c49f45df2c561f. 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/QZ5HC2163501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc2d135a7a3131817eba4f65db9caa9276a593e7802d424411aa17cef0f797. 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/QZ5HC2163502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507809b8ce7658b6b403cc82c6aa9fd25d030d9c28761451c8498a4643824bdf. 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/QZ5HC2163503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58759fe39d28bed63c458ef84b76fa03d626c75b59eb888521e5e9b9e2510af0. 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/QZ5HC2163504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59a6090719111ac57e820501e63d28a11d533437e9c4915342839adada386f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZ5HC2163505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46b11321a460b5d389724fe5473d99109979ab83310b53de42c4e87e4177ad. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:20Z), 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/QZ5HC2163506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf8cbe7b3964bbc2ec7cbad49753650690523111d3f2f04b4d2f900c31257e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:00:02Z), 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/QZ5HC2163508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358c4b2e6056049df50403b26e9980f3d68a37adfa2dfd7c82a33edff1ebb297. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZ5HC2163509.