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 0xc3af5de54cec1984b55e24517bbbbb5f4eb6321f12ffa25bc5e8d5ed47197960. 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/70f5acdf-45dc-4a99-9967-56f34a70bb24.json and https://artists.proofprofile.net/proofs/artist/70f5acdf-45dc-4a99-9967-56f34a70bb24.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 0x46ef9a207fc74b41b8544011c400ca190cb74185b61d0e59313a791a77af686b. 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/USA2P2038402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a148b311727b949e5b22e4686ee941b42af9394e18ff8e2a1a3a979f5a93d2. 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/USA2P2014923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703217fa0493de89efb865815cf492e56562e6871420b8defa098a83048672c3. 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/USA2P2014925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a20f6fa00b0a2eaff90c41fb19c80cd2c4dc41a226afedf718ce00bdf9dd4. 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/USA2P1895432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b7e2ede9cddc836a7a92f519c5303b79f4c2d5dfc07f801d2096568634d6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P1895434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d626ae84b88026d4c7c052676ad62245c9bc97508d8f221555a0fa39b18ba0. 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/TCADR1842373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dca1f897fadb328b7c08d1e2181db3ab0518532fe31111dd1be4cab4e91db7f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADR1842383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b197cf3bd132ef90b986f58de440240f46057a5d710c11c5b3c6053d53e67e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADR1842385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0f255d96eed268934e0311cc197e22752f395b3ed60ec3d795990c33c12ad7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADR1842422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb85a67ae226f7fdfb5ffacffe83aae3dc07155a2b7a4a510ccc59f9aa766e. 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/QZNFJ2401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6b7588a3d2cb746820f40e9ca8b88e502f3dc0b2a94af84f812c3bef305e86. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3DF2423703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2685ad451508ea5249a53c8ff6d3798e868fab1addba5424b71e5885b53889a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2344212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c329b75b1e521d826b113a201334804b1c6abecc47896e48cc4a4e5bae8c1f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNW72288980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e41154b30ccb741a784d76b1c4c08715a2761ae11eea3b5c2edc21f0286800. 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/ESA012294612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe5f444c20d39aacfeea68bbc829643d7a6fcb601b6e0a71fefe79a6bef5828. 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/USA2P2145078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378f82ea394242b7304c57ef34b9bc2083a7ce9181a7228e14a1c78c6b0cbef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMFV2000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b53fd8cbff07bbd9b6ee28c55bc2dceb23ae418d1c1cc9fd414d57101b39809. 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/USA2P2113742.
Al Tiro y Siempre Activo (Lineas de Cristal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40770ef2b531e968240fa705a74f429de6721679d5c29f21afa205bb4d840cd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDXS2012357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d382b970f9a9a78d2c09ea3925c9035b808180826ecf754a693d87b3f539455. 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/US3DF1937660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f325188facceef975a345a02c2851f95c2e0ee865ebd8abb6ea6b621371d26. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P1909332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe7ee874e183677a81640d92586371fd8e737f56b6dcf124e76d6a4ef7e922. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2512728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22ff13806e7218d3a14d63f482d7ab0bc6fc16337ed143b420beffffd11e9f. 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/QZTPX2191844.