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 0xed3b49a8e5ad7f994ca8167d17956058a11f1f80553bb8d9773f071dce14d051. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9265715-06ea-4c78-805e-be1a0ee811cf.json and https://artists.proofprofile.net/proofs/artist/e9265715-06ea-4c78-805e-be1a0ee811cf.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 0x8cb353ce899e4b26718f08666e8c00c601b7e8c6fc3e395c00e00052be6f90ac. 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/FR59R2123773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a845475cff0ab6b5389294cfe4fb810214fbbd922b90193211f7f91f9ab7e8. 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/FR59R2123776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d3fb03d1b14feb41070a3f3b4c817eed4ced8d4173469d059f96c639f25eb. 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/FR59R2123777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c31eb892118fbee28659520df7d833a47fa11448205f694d095746ac968df7. 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/FR59R2123786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaf42344dbc53d331621c747e1c463959ce9a5e835ffa81a797f7c729f881e0. 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/DGA072139255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efbf60157ea0f68079277c5541d96dee2695c7a8645de37f77237d4ecccedde. 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/DGA072139257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1fccdcd29a1e2f82db5608df575b619290c8b25effa2fb1814759fe4e25fbd. 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/DGA072139259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76df2ab9a0256413b69edb7491844614848ec326cfbab99fce2073519048997. 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/DGA072139261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e92da29073ae8808e266d7ca09c50d811ef1abbe60959ef2a253d33e48d2167. 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/DGA072139262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bad59c04f0c7ac486f600c6c4332bc9cd1aa2fe1fb1a0a6f8614b14c88eaded. 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/DGA072139265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27ce49539cb049f4b15a2424f46a013bd917a00c05f8108a3bfb9162d861e15. 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/DGA072139266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1124d2f8f05a5230bcce56e7450dad6f96af7f5334b2306a3fe6fd4a5e2cacc9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DGA072139256.
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 0x697912ad51d5a32aab1e4e75be9d312ce9706a3e5059d2429ba7dbfe386ae4f9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DGA072139258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9087563331c851ffa51a2224e3f66612d8af45f26780b9776df3fa91a2bd986. 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/DGA072139260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1dafd41b1ee90863eb2ca266acd946354942c12fd30de83dde3cb147d1ab67. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DGA072139263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7cb767f3e025cb52dc264178475fd05f3aa75eb2c1e98b503a7f8b88386ee. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DGA072139267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2cf892cf3b0fad401767bbf249adb99f4216a5fb6e45daf4442581d6d683c. 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/DGA072139268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e30aa993d04c8d7aabde66480a200935f074f66bc49ea44ec15e84b1d84211. 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/FR10S2184676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ef5f120d86d902568c2b52d806ef3a5ab54acade2e986b477f55273fd3d2d. 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/FR10S2184677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e940052e89e0791adef904f08084243033531d67262266aedc2c7184bd709. 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/FR10S2184678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe875d6890c19945551b9c9b05f544e9caf7fcb5ab320e26e5d7eb14b0e9ee97. 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/FR10S2184679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c837a1caa974844533fafc261648549b05fefc9d281e56433823615528daca. 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/FR10S2184680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf78a9a253ff498d80a09da1da7f300dd907516341723ce532f793bbec3ba16. 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/FR10S2184681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe6f01d108c1bb854cfbcf03c76212c8865189f4efe71169eff642795bffbe2. 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/FR10S2184682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a52200b5c2b5100bec37f9f97bfcd26d617e9579d9e0105e4d694c20001622b. 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/FR10S2184683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4e7be984e0c0015abecbe97fa8fac68bf209292d6129a8f81c77035704f63. 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/FR10S2184685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ac10ed51547f89ed6bba400ffe7fafd877efe13d2d2541395e038de88ac26. 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/FR10S2184686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53010029ea49cb5d31e3d08903e0e1a9a8aa51adbe5551172b376342bc6f781. 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/FR10S2184688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0ecb7e7928cdbe105a22843a86eaa406f195bd12b57f00f4206f9d4e725e1. 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/FR10S2184689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703fabc785f92b625865a8baa12c8f30d62bbaaa5e439e4052238dc7703a5a3. 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/FR10S2184675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1a2602dd43b6984fbfaaf3ae7f11ad2cae8151f5d742160fc80aabff4a5bba. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR10S2184687.