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 0x3942a04de8f715ea2977234ec64c04330b8fbfe05971f10fff325ef165b8b3e8. 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/b410d9b9-bc7f-4e80-b6fc-081d682197c4.json and https://artists.proofprofile.net/proofs/artist/b410d9b9-bc7f-4e80-b6fc-081d682197c4.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 0xf0ea506c29d6ab8379fb91aff3ec905611f6e3913ace42b9d0c33c182a9478ae. 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/TCACK1549274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867dacc6f6ed44164b81e53d028e9f5891b15aea055a4dc9fbeb023a74b10839. 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/TCACM1625073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bbec4e959275af679cc5df39f55e874987e106e5146445e749211e67e54e13. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCACR1689399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cab48003c1ce4b6f5dbd3bf99158e91fb94629a434cfcb5fc8835dca31f5f4f. 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/TCADC1756285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a5b05504bb9ee755505d1dbe51174873dc754f113b296ac80fbbc3b32b9e0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCADR1873802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5be36b527ad42f3bc56e6124020e179be89b5c395693fccbd40cd6e6fdaf3. 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/TCAFE2091367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33d339557a7976397331c38268a464d83869c62791408e8ceeadcbc5a3206f9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAFE2091393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230814dc7aee85cdcdaae9eb777ef1f49edd2f7978e6de23a383f750d3de08ed. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFE2091405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3562edaf01333f745a43fd30374fadc537ed290306b15e22696b87e0cdb99ec0. 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/TCAFE2091406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fa43aecbc294d1bd1437319864850f0c7fa4bc8903564bd08e936a15ceddfc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDA61980075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f65a854cfc19ff5a75780d9c0c0d32a9f1b985bb8c92396e6f741e9ac608da. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZHN31950431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422eed0b11f0d47f2fdf184ea3c206e58b74ff986e6cdac5c429848d85c3cceb. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/TCAFE2091630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835842d118eeaff87925bcb0c93e72fe23d43cdd3739aa838002161d7ff9b3e4. 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/TCAFP2155544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b122355efd95387e31467fc878b12e5cb2f03361c4dfc36871be39db8b7984. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAGW2346292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6363d249cb23b8a48a12b4e091090885f1c6638a73613482f49cd862fe5598. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAHA2369959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a306dc3e547ab19e6a94f425a31d91bc51dbc68c27145a82f54edad02e631f. 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/TCAIM2465715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729bcd04f3f7db6fafa17dd861cab2e04a1f39e8982d401ec05d70ccfaf41c7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIQ2428327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffb5e7f7aec1245c09c9fa322e9052cd9aa84d25734ba9e02bbade5486828c4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAJD2449656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660393759c776a800bd4cc02b2f064e07803bba5e3d7d0696a73eabf0548472. 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/FIK2Q1900019.