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 0x9f60000098a23dd43a75d99a16872cd07a4e918684595b1814158529f2585a21. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffcf322-9c68-439f-b765-6c3f5a74cf6b.json and https://artists.proofprofile.net/proofs/artist/1ffcf322-9c68-439f-b765-6c3f5a74cf6b.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 0x3691470ab7824b9ca6af9edd1b9579d453195f7ea7b4bf0709b4d1d9957cfaf1. 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/SE62X2404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c45a842b749f07f720c01cc8919a605cacab74d24ec21a8be9cb0b1ebb6da7. 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/SE62X2502201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e0b5f6f575e8e2b5c1e8efb43105a94f8af4c8d49f4995c6006c5d68feb01d. 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/SE62X2502301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345493a489c2bcec83b759ebfcafc2048eebdb29393a93dee6e7731515b70ae3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SE62X2504201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0e76dd527d093fcc90dd5c1bde48f2d89c772af26625d6b1c41de188f2bf9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE62X2504701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e746c482f9061302f79b470d83f0ded016ae9614142d3e6c4a681c2701f050e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE62X2505101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f39005b63345bac03b738ef5d6e7e8db572a02d6c8538789ee7f6651f8e9f9. 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/SE62X2508501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5cac76796483ccae153cf57d1f06dcb41bc1a29732044b54b20ff3bde2a75d. 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/SE62X2601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773a45ddaa16ab2913278af793fd735bdea97133e1440b7e011987f9843abd96. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/SE62X2601401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe11d603082b76e28a2fbbb361bb14f6f6f703b39adc4a257e4fd78a80aaa80f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:09Z), 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/SE62X2601501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8dfda6d576976614d61287e710a6e246bca871cbf4892705f84f662b1ec36b. 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/SE62X2609201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c26b14173fc415ac7211758bae4a89f09f8783c2faa483a377c75373a6c91ba. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/SE62X2609301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c1080d4357863d3f6e9786cdb7fab1ec2c1640cd866f5bdcb3037770846eb5. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SE62X2606601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244768d5965ef5bac634a329720d54043bced085b9191da40b20d26dedd80782. 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/SE62X2701301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9207b38ac7734bc0d512d1a36c425fbe1b673e5ac43a27432cb59a9ca684c44. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SE62X2510701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb086004a09796a8a8a2ddf31178c5d32b4596630e0f5a6b463151468411746. 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/SE62X2510801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb28f043e2399f631b4c1cb6db2f92dbee8942fa2d4c834a4858b655e4796e76. 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/SE62X2536201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886fc5083071da3985c07dd627e414b292e1599526f49f86478c53e8613460fe. 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/SE62X2536205.