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 0x49c8eec1c77b43c7295baf32ba4442a2e9acc29b50ff80e34c4f484d98d1bdab. 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/f20e751c-9b63-4dfe-9331-c5a254a1646f.json and https://artists.proofprofile.net/proofs/artist/f20e751c-9b63-4dfe-9331-c5a254a1646f.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 0x3822be04811253ec8052843c5ba7f55db49284165cfcafb257f6d4fea97eee29. 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/GXF9Q2476578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0a8a8bf206ef25145a2802b8b6aac9b31198a7b5c301ca5d0da2e0ca31653. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXF9Q2476579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cdeab09470ef6a28925eddb21999cc38e313fb5fac9fa71376c1bcae4edfee. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GXF9Q2476580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb79d4930ad3e3aece71ebe3a26b95d2f4be1bb93ef0829bce6fb9ab8a6c01a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GXF9Q2476581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0b28a20520c0b07f9c8b5bd599c41ee8e035c6ff605c5e934b46ec64040284. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXF9Q2476582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc7ee7b51e6514f1a42d31a2ad795bf80ec0d55b853d3086670f94ba55e7da0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXF9Q2476583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e9a94cfcd353a15868a23601a007843704612249c960a58da86f0185bc4f8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXF9Q2476584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ccc25883633eb087fec05f6c77d66d4a194b2dcc627b7e2f13062df37d3b23. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXF9Q2476585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1f14df57210583a3ea7456e6a1d2bfe6b1c9f08e12200a79394998f5d0bdd2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GXF9Q2476586.
Camino lleno de recuerdos en un dia soleado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98176f5c4c8d65edad76ad6a6aaf31bde8da3c0e1627570223b753a9f34d826. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKXN22526799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a57e3b112c1077a04f42303e46aa9f4ce1e3df39dccf027b074bc18537564d. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/UKXN22526800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31292016960546a42f87dab6749db1cf79ea62b4b909f8140c43330be825c1b2. 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/UKXN22526801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac11a593992481bcc43957d34cdab89e48cc96e7f9e3fc8b374f6de46cef34d6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/UKXN22526803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791b0c10b36335e83d48bec71850795b701fb1ebe928b15289a20a5d18ccb4a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22526804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3739610a4bbf62c6d1d70882b86c916acd6918c4a3157f4ed1428245be22a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKXN22526806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13e80f1724dfbe2ec7a2e27aaf3d08a747941ea0933f0116d6c60ff03c9f8cd. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/UKXN22526807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c5d97502e2dcb24810d0330a79d887dfca87af141fac0ede6ab01b6e41339. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22526808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a91b587c652643650403e59febff557fe1adf65aae276308c67076acd09351. 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/GXHG92559982.