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 0xc5f51d3d4d7901b32fd951e90c4109a06863e8e088e8b2638a1127ecaa88bf03. 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/f9b35518-dc43-40bc-ac2d-0600b1e7f2db.json and https://artists.proofprofile.net/proofs/artist/f9b35518-dc43-40bc-ac2d-0600b1e7f2db.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 0x6482d544ae02cd791695774b32c764fcb95b8c98fd010681fd98753f238048eb. 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/GB5CD2216006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5409e0abd1af74a9e05c185a99a3c305c3097478b0646a03529a2fecb5a3f966. 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/US6QR2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a585d66a1e9f60432f0c6c00c594f0e9cb08eaf1e46cb9805fc530aba4ce2d. 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/US6QR2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8e4989854a5c4e764f7146d461ff50c37000fd11258db17def089fb5a1a92. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US6QR2200021.
O Anel - Alaíde Costa Canta José Miguel Wisnik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeec4f2a8cb71022821638abfce5cf525476fad410e0ef91fd76c058e35569e. 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/BXSVC2000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e9cbf4510bec1a0cb5a95eddaa794c6c7c91efbbc891ef4f597333f7a32e7. 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/BXSVC2000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e3a171cb6092b1d1113f90bfe6fede6375e5050f1aa4c9542e4b1e0eccc85. 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/BXSVC2000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcbd50e0ea3af78b60d345bf2cf73ab1ac51e956356878a351e8acd15c4a7e9. 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/TCAGR2247049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9caf73b1f44f06491e3567721b71a780fda3e3c8768cfad53f55495909bba6a. 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/QZZ7L2488908.
ドルドーニュで暮らす幸せの一日
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe740509ddd4fb078ff19246180ea2de4bfd14ccf77e2d2497df20e0b3265bc90. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZES52435200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c447b70f352e0377e3e21b1131cc3a53dd6d72fa6610ad9127776add309864. 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/QZWFR2476249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94b5dc4f297a71cb1ba315194931d49f036f4c3d29a0ee9d663007d5969a821. 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/BXPBE2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44992852879b90fb868eabb87dc8930b0c7823dc12d7088985d0e8b5dfdc616d. 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/BRV542200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d559a04465ce8f9d7bed80f0bcf8a2a0ecc6450225de1ac26b4d24f2fceb0. 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/BRPBS2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e2aae214c54b6b23f5ce09bd0a0515b2756fe14a94a2a3cdb6511644a5048. 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/TCAHN2359062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2a1dada3a0e3b32420430b1059dbc49807a45e1082198f8fe79362e7e2b6fc. 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/QZES92552318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c45dcb88d8da770ec4d922ad3ec98ec226ea320ba80906a934b19534515e3. 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/BR4632500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a50c061f4b1ed94b7ebe6de64edf2caebdcb6bbd07c2cf87f87240d0a15a4c. 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/BR4632500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e77c487fff4aa718326f113ede319ec9d42234d26c7499a9747f86094deb3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR4632500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1605412024a3a1b198c82f16372db926c45f404ae0aec7c1ad4201e883a27. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:43:49Z), 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/BR4632500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d88ab11150532d0548e9569b860350cf230e7d41b23f4cd06ef290087e38498. 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/BR4632500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06352df410a0e206fa4ef61c15a709ca7c901d194d38382d49fb7ab68c56865. 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/QZHNC2554461.