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 0x10f0661a9afc91e1d0da60bfabd96cb6ee467dc37c7ed22fddf2806fea10771f. 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/4f8c08ea-040b-4050-aadc-049cedccd25f.json and https://artists.proofprofile.net/proofs/artist/4f8c08ea-040b-4050-aadc-049cedccd25f.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 0xc6f8b1c50d8ff86c2773bc8545f0220202b3d2d4505c6fe8789f7fb53f067576. 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/QZHN62030250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783db335157c5d9ad45346a37e16a71af404572a1f8f9db7393e5bcfe84c728. 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/QZK6G2035332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64452ee79188a9632089fdc3b8363e7a843962f461f3f011c6d7725f80d910. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA42132160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64452ee79188a9632089fdc3b8363e7a843962f461f3f011c6d7725f80d910. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA42132160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1438e7290467c1a9526c15713ae85487de7271075f3da964b3c11d46ae4dd1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEZC62320249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5865ac395b55bf0fb98058d2f5d4ee7ca8d4e42b2676bfa294868ea8e016667. 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/DEZC62333978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3331adf68525fee9576caf222cdf9515a815d0423f95a7ceb4c9d9586ec9d3. 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/DEZC62333979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea509323f071aaff1099717721cf0e20e93587cfa9b8c95502f9f8086b9b375. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62333980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664c17ea2f4b5a0ee0e4c1cc7486313a5c2d6b31b19e845d54a62596c0021b48. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62346670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53ee0e3701bf39135764800ed7fc4b242c1366ef390ef6e2e8597c3ff61165. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEZC62359981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead10001f31b2e199553eaa14337953adef04a221872715b63f259b87a448e0c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62494081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e1049f031ec8e7f3e16d22f624c611a91ba3b7c2fc14f4f16eb762c75a7a5a. 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/BK4DA2409973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcdb003f014ca081d8329d605e838f307e67869e8a2ae43b724f23d671b4f3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BK4DA2454398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6897be96d1a6fb1b413721127d04cf817f8a25e25e0e787e527a871dad22cbf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BK4DA2414743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b24d673be7fe4e88bec31314217c3c8418af3ea5a08549fe0f14b10d4ae184. 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/BK4DA2446767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42714d7da0170f1ea94bc6b4b5494c3400bb77e12c7bb3d8df253d27f0c13c4d. 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/BK4DA2524259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48609064625bd6d0251913a8717d61aeb4ef79aa8a98dbcce099221e66bd1c22. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:35:44Z), 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/BK4DA2526152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184ccdc768e39ab14c9b739a31c93ec2566a11ee8da05197226222ada17a684. 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/ES84D2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe814e819abd5b95c379023c515d715b04765c05e4b0a9e3a885dd2d983ae3a3a. 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/QZDFP1932092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1df1480b033db52b420289fccd6c157d7bc482af0832e8e53f9d0efe22c707. 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/ES11D2301054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bd37303d4eeea7e13708d2ef8185729acfc3120eab185cb4b1146b698803e6. 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/ES17D2402364.
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