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 0x1634906c52be7759f9f2ecfe49b4e809fde8f09edc51b6ac116af6fec08508e1. 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/891ae63b-8560-4076-a0de-7548f111ce44.json and https://artists.proofprofile.net/proofs/artist/891ae63b-8560-4076-a0de-7548f111ce44.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 0x43fc5834b2df53d1fcc96604ee9235a6736def3092d8de55e1c8d6de8bc04f75. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:52Z), 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/NL4WT2000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17435ec69cd3e35293d4d7e72ee09872b258a3af33d5bbde9c6c8e81ccab4a07. 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/USANG2240359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68c92470a2ac6e1e3f3e0eda7014c2a2af7343f49a05f8b1e8a564f2e89ecd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2253019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710dc8163e5d20435f0b55d2ba343bcb0c7f65c3aa258512435e36dd388235b2. 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/USANG2262022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68c92470a2ac6e1e3f3e0eda7014c2a2af7343f49a05f8b1e8a564f2e89ecd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG2253019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe780ca1b15d5fdb67cfc81f38de6e544c9fb4188c1f34564a1b67a7287318fa9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USANG2262042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996c3acba0112a4c2274cffd5ded160bb78e4dec211dafba0c68e85f8ff1a46. 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/USANG2262041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb7f21ab72bf10795089400d154f374a02b318a0aecca973d515f02ca9c67f6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMANG2206441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dcfbc0f857e24ebe8ecd4ff44c8632c8e19aa522064e3390067e6df0a64442. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3DF2436568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69573c95d505ca6b604827c3d6399fa1f46f00b0c457f0f70825dea2574666cc. 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/US3DF2434716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b204d77f237e38cb8635ca66b1684f91dd53b81d305ad15ee488af5394445. 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/US3DF2434717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301e9f42f4b211c2f4affa4146fa4dc7e322e163d17069c6fe39cb8f898a7c34. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:21Z), 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/US3DF2434715.
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 0x6e63017a00a6aedf1501bb0a98a8e15048a281ffa9eb1d88db2ab7d0f710ce06. 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/US3DF2434714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055a7e5a3fe54d46a2969b04d5fb40e74c698adaf29e36d4456e50c99af397c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:18Z), 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/NL4WT2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a7c0d8982633cc32b9449d89d93815b5e9e90633e6afdb6f7fdabb849f6da. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/NL4WT2400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fd87a61ef630cd9080def4dc2108191ecf3f1d7fa88ddf4bda6cd73c99dd59. 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/USANG2223277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48af9b67a06303d9a8eb79c8e7557bde73bddf9ce350ed0d94b1e22f8a2bc50b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM3DF2207234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f890d7f4ea962bedc24c87c8ec977e059f0e76d1b5cb4a1a4547aa8b97de518. 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/US3DF2441963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a837c9d0ffc26f428bb760596b867e43497e12f278f168f5a4c07c307ad0889. 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/DEQ022390354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415ba5cddcb3aa04179d79adfd3410ba21a208ae73e5c3e7b813f3d7fba9ac5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM3DF2128277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1346972687d529e8606342c6630e7a8704d1a19fd21b203abb244bf9c066d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2285634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d58b18456b3ad6d89b4c13d98d4d18e59f85d55aa74c9930fdabe1a69d3fefe. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USANG2258862.