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 0x4ce3c9ca7687f6c1714eaed202959d3c90b9115a83299d011ef2ac2b5d214417. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abb33785-82fc-4789-990f-abae033f7ad0.json and https://artists.proofprofile.net/proofs/artist/abb33785-82fc-4789-990f-abae033f7ad0.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 0x01028bdfab139d8ccbca45a493416a6e3b2c638975168a6f568d19d104668a9c. 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/USA4N0702649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6faab34b59828c2f6d80a27500d1a5b721714df70e7a559f2c60a40d4683ff. 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/USA4N1301376.
Christ, Be Our Light (Easter Vigil Text)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e2debf57345bf18e9b68b668e133bc515a217fc7cdb89e7858382fab671619. 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/USA4N1305525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3b07d9594a79b8bd5e5dd7e7bb66b7b56e117612808fa7c40d5a5d5db43971. 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/USA4N1301515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851a79819967652313fb1096e7ae16016ca1b6cc06abfdeb35065b333ec1189. 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/USA4N1600237.
Alleluia! Alleluia! Let the Holy Anthem Rise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45eeab949933733d1641dc84fda1648823154d9d90a5f669d330eda0e47293. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA4N1301461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4750f6343c0e8b545fae61b1b0f8ad32c36fb608253208879cae03646fa767. 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/USA4N1305559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b62f0dcdb2c0c9cb486777a3ccf8a2f99713a0d8d9a95949e2ac8bc489870. 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/USA4N1301518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc707c821562e940f367530f09375d25cf870655935d64a2d0bc0ca1732f028. 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/USA4N1200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3b09b7dd099021987e5419c27efa27bcadbd2288f696062d25917b4b0fe39. 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/USA4N0300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4dae5237f62b12c730707e18d5dc4af792e465edd9597dea65c1232af0b1d. 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/USA4N0300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a8d155a3d5519b3e7aefa7491abcbf4ece6f3495387b45d40e9c03e7da1a7. 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/USA4N0300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed4e1a605b484489f117d7509bfdd9fce3c5738052654a7463a93c73d2c3b25. 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/USA4N0300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f0c4258cdeb2e16cc073171ce9540fa5aedba7ea3e431c537b6b9faf59bfa. 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/USA4N0300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cef5282887ca04f57a4873c503c3c24b53d7c42c5d8992bea567a727eb8edd. 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/USA4N0300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a1678217b1c4b638ccc737b62b223a575f2498797f5f9a93db9d5f88e9bef. 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/USA4N0300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc00b54d3452a4cb2593f215c489b51240bc61e35d2aeb55f6c5f9a7c3a355. 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/USA4N0300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e81a000ecd2e96644a6cf91bade616c43c8879b34d0d3a20c68402660134e4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA4N0300383.
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 0x91eeed42b6c3b44b477c1dc3a19986861c4858272c3a44b12186a42be6260874. 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/USA4N0300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89363bba9ab443e539dc8737a57ad868ea83e6c0ddd991457d9ebdf17035cb. 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/USA4N0301365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9508a5654dd493f738a5d55a6e3d1cb974621d8c92ca45687534df63fe787c31. 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/USA4N0301369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c021c424bf4069151d8fb0c40b3c479f4a06b2064b9f4deb7ebf89e12723f5e. 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/USA4N0301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17da683053a84c8ef3aac779d63b9d27c178d1b91d279db3c6c779d284f531. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USA4N0301377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d7547d72f7879172af09d44c1e24c8cbb982508adfd515e5f9b40447cc492c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA4N0301361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e69c605d1b5dacf02ad3dd36233289e4e66dde717fb72fe79107cdb6e77ada. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA4N0301373.