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 0xc535c5c85e129a80ff2182d3281a08fabcb38eaa12423fae4d145eda7fbe6529. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8c7309c-d476-4f5b-8171-a1c2002f9768.json and https://artists.proofprofile.net/proofs/artist/c8c7309c-d476-4f5b-8171-a1c2002f9768.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 0xe9ee7d230e57c02c8c69f5007e7338c16f51e259e7a5ae2e0aac7538e0589904. 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/QZAKB2361642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7345cd04e392222ef8209204300a68e410cfa0e8626d7ad2466b3c7f1aa39b. 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/QZAKB2361643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cdfc4ea18394ec615ea493f58e82f661950b86c0a0c4cb3ecec50958ba4c9f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZAKB2361644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9f539b9d4a0a025313d308e758f87b9663f6da79c6d76d24b94a77c2921dfa. 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/QZAKB2361645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726fe6a016d17f1fc5ed597604783e339c619ffdd2bb3dd8c8769a781868f0b6. 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/QZAKB2361646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe831b74b63131d9b0c03327b1410d3bf59737dc690d94997d3fc67fd50326bba. 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/TCAJK2513579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf39436422718262e1d7a160da7e85960d9f9f946f1c9806cf5e4c989e76afaa. 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/TCAJK2513582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166b96d65458577146a67966b8c6db7aef06c28ebc9cc629f677fcad2bd18bbc. 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/TCAJK2513583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf003b4752b07cbb15f101ef70957cd7800fab65949d2be88af38cf2b7072055a. 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/TCAJK2513585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38ef61ff8a18b2d37cb5298f8f4a7720fbe29c9955d586689c9a0c456419cb. 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/TCAJK2513588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623d16989c83ea6ace5337fa662551e459e940f20c541ff7e4d156df6ee9b1d3. 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/TCAJK2513590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2797a56e8ea1a0911fae2380a5f42606cdc4754d21220cd237a247e73c26332. 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/TCAJK2513594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9c16d508e7bdd3ecb94e7a2702a16d35a53cd13cffe9dd38dd8934b1bd71b3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJK2513597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b77171dd04e7dddf9705ebcf195226e21bf406eea944356b115f2d3a87cf30f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:45:00Z), 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/TCAJK2513599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cc4a7bfd760f031ded517eea7836becc88c2219f0c19ef80809565a3d9b316. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAJK2513603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b90185edbd8708dde8bf00ecc0b8d54176074fd7b39cdd3224323eb67aeefcd. 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/TCAJK2513604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514d810d1d45c2b9f9fa96793e1710128b6c223d8a1c67773fb18309b4458a9. 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/TCAJK2513605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dff38414018ae61922d5440a1600ffaa888c92df46eebb944584fcd7d9f4e61. 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/TCAJK2513609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc126e49d443c139abe15b843943b6ab8517e4ec416b65257dc1cbaaa3a11be9. 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/TCAJK2513610.