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 0xf0e8834c1d06d8d9797a565b031879252c03cf150f666fae8e31f6f5a51ff152. 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/5c6aa006-6dfb-4292-a4b5-27f1d9e004e3.json and https://artists.proofprofile.net/proofs/artist/5c6aa006-6dfb-4292-a4b5-27f1d9e004e3.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 0x07a1d440c65dbc0340a9b80c0e97c59509ddc06a9ec359d823910b0b1f22cc5c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHJ2380925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c2b86dc3ecabb7f6fdafff36e0d5ad5fb540ff66c316e4717a5db6c104fba. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAHO2311358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d3784ec5c6514659f02fc4da053f3624d2d604b2a88e1b1180c968aabc41e7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAHO2311408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3a7be6c13da367bcf9f85ead0887d1fbd6ad9b7bd5dbdf84b0a0e026c656c0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHO2311416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8c58c7f7b3db0afdd0a0b9f9fb7eabde896ae1ae03add7b15d03030d57bc0e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAHO2315614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ae34ab9922548a6564033c8ba141aed91febf0b483f62010f056a98df4192. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAHO2315680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21394a0c9e1aad364f8936ba847a3b7c6803dd9db76a3be342b36929a7fce8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHO2315738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c61be655084c2be1f23e5f1940348dcab1fbfa9c2a9b9ac40d36ce4c4691d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHO2315746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff046da25863cab7520a66192b7592ba9b1ce1ee1759ad4ff38baf783be46ecc. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAHO2315807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e31b07924ab8281de4d7abd61223d3642a462d7ed55568449eb255d1381941. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAHO2315825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611143bd9d3f21718175515f5efe67d8042b0402f72d58d7cfefe9f6aeed09e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAHO2315899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9a3af2b989851966a085024af759c1d270a5958051dd033fea45bc537241e9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHO2315937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f319d5ead6324322e2fb90fef72c48267b85a9c7d2af6c876bc13f7833108a4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAHO2316040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91862ea6359bee348457b0e3d6485ce01f4be088fd21d57a7dc1cccdf0522d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAHT2458356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293e5c44cd7bcb2f061616b1a6a3bbb5cd523771eb44343d0c75a4418bcbec8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHY2492414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeaf446bd35741e0cefc2f5dbd81de21652113f59a27651cd998af5beaaedec. 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/TCAHY2485616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f1ac85611879a40b162a5ba648cb143d403155764148932606eba9a420b24. 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/TCAHY2485523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22332dc020dabf96e0155d940528f1165ed32e2e4b10ae450a51cba0351b2de8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAHY2485602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf32c8148f7add72f33e8d20041177f17af560a31fceee1a0bfbaedcb8d408e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHY2485630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475990556f2a7f5536630ff5db9a5cf2050bfdb475b0f465c504e40315db97a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAIF2418881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475990556f2a7f5536630ff5db9a5cf2050bfdb475b0f465c504e40315db97a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAIF2418881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08482f57a05b687cbd9fc8f476a482e199c24adb658cdf433898d338ce23eeeb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIG2418853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2d13be0536ccd186517621f35b60528700be90a20e8fec2f082947e4a52e0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIF2418859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800830c8ebc864c70e41773a6804f02757f89a0b304fae7a06a4bcc4fb536a92. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJR2571464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992e005ebefe1c999083a195917f2ea99d1c11e18da0995be050f55f27059c07. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJX2533923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de71d16cd7fcadd4de1bd5e8d6ef902954b2557d4fa9ba5fb6630c85d067f29. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NLD682402184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a17525d78930098b07fc9bdf79cdadebb5430745101645851aeffcfa5d59c. 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/NLD682402185.