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 0x6ed9694ef561bf61d872058d9fac31836c3f1887ff8e4032fb91fb1cf11cdce6. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ab0d1c1-3b07-40ba-8b35-8b50090d3c62.json and https://artists.proofprofile.net/proofs/artist/1ab0d1c1-3b07-40ba-8b35-8b50090d3c62.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 0x8f4741a110fb91099c8d42682dccf8155a647b81e0b4b5fa30c6db5918877f95. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA560683005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2148ba3e0c795abf46ab0f766c9a60b17d44cc815a06cdd7dd082f80d173f49a. 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/USA560683006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68069d3fd24d4d9de86b17b853c8c4f67791cbad8616bd662a923b6e8a23af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA560683007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb0d53f44bd25fbdefbf519b6f61db1d88af92c57266be1ecaa7b0868d8c1af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560683008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc3a9eb41bd94119086db7ef2c32604323ff11d026a276a9a40d6f38d534ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA560683009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18e64e2ccabb79f1dbadc5a76d207c475e96de3a7fbdd6223ab114a1ac02234. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560683010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4f2cef1c0557d828747b1d8ff4b95ea0509ef5268819bcaa023a33661b8efc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA560683012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4363b1e656af92dc48fa1668c78903abd4769faddf2c5ad1c9c015dba01ed1. 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/USA560683017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df7a8ff7483c8e4d62513879d982949bdf62f7ba177bcc190d9f0ba71288dbd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA560683018.
Jesus, Lover Of My Soul With "Fairest Lord Jesus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244f34a28e830651d20fff20fe510cfedf46b683cc1304a36d4307687b8916a3. 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/USA560683019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2447290901c52566760de44d363ecc1bbe26723f954c62361b7ec9039bb84e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560683021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f060a1a90ffe7a9333d6d0ff80a50ee142ef7f7c3931f0dc70fbda887ac4cbb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA560683023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8cb696b2e2297d9efb0953e18a930cba4d62c712c74cbc82bae07ff02b577. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA560683024.