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 0x29dbe1550688a7b520c4cf6b56dc1351f5753eec27c6220ed6a79c96995ebcc9. 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/2e769cab-1d66-4511-8b10-68ed92e12768.json and https://artists.proofprofile.net/proofs/artist/2e769cab-1d66-4511-8b10-68ed92e12768.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 0xd305733d1dd9bbe4d9e3510042f6d91653ed86ccc15aab8f8419788bbbee5891. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMFMF2344789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fe3e740a34ccb8911a1bb1694e2a75751a93aed06dd4e9f60815c676992294. 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/QMFMF2345026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4dc1cb183d36dd2cc159bf4886407e34c29a5b46a1e6d64e369ebdd82252b0. 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/QMFMF2345027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305733d1dd9bbe4d9e3510042f6d91653ed86ccc15aab8f8419788bbbee5891. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFMF2344789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314f1fcc1d2efea86a3b16c5137194a8427958615d5106497820b2e74c5fe82b. 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/NLYV51900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583d8bc6cb7d942bd8e44de3db23f06b002c60fcf328f0208db9d96c7323c4b. 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/NLYV52200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83e5b5620222160336632fe70010b6e16d4792ba3b318ee559c7e87fd8b7a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLYV52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9441aff6ba6b5785540de9f452834b46a6093b59d6b8b143b9c5e288d7a1f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLYV52200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83e5b5620222160336632fe70010b6e16d4792ba3b318ee559c7e87fd8b7a5. 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/NLYV52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65907a3dade76acaeaf99386fdfe4c5330dc52c554652242d9d68da182a99303. 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/NLYV52400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba5586a65adab8b72a74a5503deb8a1ec90198ad004425306ceab9687bcf0c9. 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/NLYV52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6b2404927be5dd4afd357f46fbcbe3155a485e100c7001421f74b62d61463b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLYV52400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45356f9c3cb08e2e969b2fcfe8b8162650dd76672d6b7f80f8024a0e4ac15cf. 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/NLYV52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419e424e0681bbb9f4d481c3bbce9221a58f56071605961169fdf8a576864e88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLW9T2300023.
Feel Like a River (while the world is on fire) - Demo Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2830da0fac07d4610fd912a0c261acbaf39156c7b8599a20eb3de2d2cb84a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLW9T2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4c11fbb6182db5bdbc9698cf85ed3160763e540f7ee332010f3e8284477e21. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLW9T2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419e424e0681bbb9f4d481c3bbce9221a58f56071605961169fdf8a576864e88. 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/NLW9T2300023.