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 0x9c7ec6d19f021f231bda9014fd359f8981956d582cbc00131891a2d00d7ad848. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/555db300-a41c-4a19-8dd7-1994cabd1b69.json and https://artists.proofprofile.net/proofs/artist/555db300-a41c-4a19-8dd7-1994cabd1b69.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 0x50aa248c8dc35a8c8b7de8b4e8ae94f10baa366001bf33ff63c6a47c35208dbd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q1903845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b5c2300e222d784745338fe362f5aa85fd25e33ad4599ebde25e0f8a6960d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q1903850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da1149ead43704e44808cc050fcb772b311fa3c80bdfc54e303f3985f0995d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM82044509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952d290b983000b08f3a2557650927384dd9786df9dea2b1991ac31993371b91. 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/QZFZ42272489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a20b8e7bcaee7dd9bb6aed38730a55f94da2091da33a8e4a622a46ea103e34. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBE2319363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1842d47f0d5b5bd760e735142cd3b3700d35d325f972379a7f766a17e5b8b. 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/QZWFJ2383846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160b8033b36b2622942aa2a7c3c0c10139bf0be827d8f9f277719aa4ec80875. 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/QZDA82402385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61cab129a7845d3fb5871dec9508bb3b5711549ef3d2ee01a240fc29433e1cf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES82466922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deeafd4996298e0d96c21cb16804e2d0d003072f6ba863d5a0f67322ca1547b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52455454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160b8033b36b2622942aa2a7c3c0c10139bf0be827d8f9f277719aa4ec80875. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82402385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a91ce1a4f61bdbb482ba6532354c198bf48ae0b4ca01001c98b1585b57a15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52455455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b0d51fd3e616d6fc698d20f31354c7f44762ee970fb285413eb0eaf64d5d80. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN52455457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952d290b983000b08f3a2557650927384dd9786df9dea2b1991ac31993371b91. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFZ42272489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d86b6b9275b247d1ad24a6c125e53ac8e370fab961f2f4ed374f3019b44a36. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52248538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75433d9ac27fbed98c73fad5a280922abc984813dcf142a7d6b60525be0f626e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32484649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61cab129a7845d3fb5871dec9508bb3b5711549ef3d2ee01a240fc29433e1cf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES82466922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a20b8e7bcaee7dd9bb6aed38730a55f94da2091da33a8e4a622a46ea103e34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBE2319363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997a58e2a21f27130e8c8866ea10d8474182a79ac54f93ab89152959dcd84a0e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHN52455461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1842d47f0d5b5bd760e735142cd3b3700d35d325f972379a7f766a17e5b8b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFJ2383846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c4362547461da37f351a2909aabcd9bf17b44011cf8c2030890706d3127b9b. 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/QZNWQ2537738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5cbf24aa170a9aee08847a051ac12e333b17b0fd79c4d09731b68eb5cfd96b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFH2596209.