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 0xf41776eddf0e031b69fc86adbbdf9e2662e0045ef4a43d346627a49cdb818b3d. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d4e2995-d191-420e-87ba-801b5f7c4316.json and https://artists.proofprofile.net/proofs/artist/9d4e2995-d191-420e-87ba-801b5f7c4316.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 0x2f7ebb8ab4e883dbb34a6af592d311619ed572cf8afdd2cb814f5789e3f728c1. 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/NLD442200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f42480a1538640c6649c432bf52535a809f07e0072806057ed4038c99888a6. 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/NLD442200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009397300ecd0aa1332be8125dd59f421febc6abc8ea71ebed3ba9205e4d3f34. 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/NLD442200058.
Hear Me Singing (Na Na Na Na Na Na Na Na)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c702d08665c39a9f8e40e76f4bb465be27e2ff0f2404986cf2a0806a6c1ee. 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/NLD442200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30826db0c8c6f97b8cd0fa44bc33e3026c30dfd880f9b2536914043e6cc93d1. 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/NLD442200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cdd32661fc3cfff3b510b195fae09b67f758755983e25866d62a8da05c0cad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLD442200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33c426a45df5f2004ea5ff6674522a92169b4143b67454d5888a1d1106d392. 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/NLD442200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e08d4a812b656ef3f62de5834b43b1d697ae5d82a933139f798e0e16353f08. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:30Z), 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/NLD442200064.
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 0xd2b25cb176043733dd19d10b7e1bdb72dcd557ebcee270ed47111f6fa4adfe13. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLD442200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a62c17c82f9b835d608810411eed07fa26c41c5ad8e45f8c92d46f607ac95. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLD442200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33152c6dca9e8cda2ffefef14d42e3c5c330883bedacd217091c1085b5ac1ff7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLD442200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe512e708be4c2d79fd3a9881b07d3289390b96f9cc00bd0f95dc9da82c1c14b6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLD442200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578d5757fafef15b17d2668df1319fc86208c5bbaf4c0aca9b5a9a48a0ecaab6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLD442200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699d1c5693a75b79ad0a47da6d98822f8196da6e7847a49bcefe1e0e409e584. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLD442200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3607d7503aff1822c81e62cc41f58436c19313de7464ac978b72abd110e26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLD442300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec534158d03dca680d1308fd6b6975f77ba4106a14ed737299a4e204aa906b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLD442300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3772e91c301b8f9bbda1c4d4db3ba9fd4262d298ce1b0e4c1da0ea470c03ec. 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/NLD442300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c2bae35f1631f8b8f49ac2abdcfe16d668136c4cf306890d5c2e54cfc23866. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLD442300112.