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 0xc42b58497d07c9ccace92fb218ee65e7db9f61c4bc9a487e739a093ef4e8969b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2e065ac-d4b6-4c08-92b5-0340fba7d3b2.json and https://artists.proofprofile.net/proofs/artist/b2e065ac-d4b6-4c08-92b5-0340fba7d3b2.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 0x70763c70c61d5408d1909c49f63f34b06e053b39ce88eab460170ade8768e97d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:27Z), 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/US36V1110007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d78a136b933f11f30d9d50b70731fe357f4d05b7c3d930ebc4c40955a8be5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US36V1710001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1c8bd5df0a7269e48093b771b223dee6125baf9a10e05540a4b77f74d7233. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/US36V1710005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6c4aa150c61e8221006f8168ecd660a3255ebab27635860b7c6f06d49a690. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US36V1710006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b46bcedf2fac2b02b0bd0c80866f71356e6d900474541f32fc01c0540dcf93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2338547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05576f16fe23a8b2c3752c9a27da4fa91c3b5da09915045bd91d8e56e0b95298. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USA2P2338548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bef750432b93221cb340e0626b047b321c09ad87f6d63c0adc44700d48247e. 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/USA2P2338550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622d90b3a37a8362804f525d75c664ae36f54ffa11600052aef189344d7f14f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:16Z), 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/USA2P2338551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c82988c1d777b05d0272bc0debfb582f76b8bc03a826f126e121cabd60a61f. 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/USA2P2338552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e36aeb83c6d03518fac3f727b4efca66a5355580c2abb0a3113bdd3ac3d8f0. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USA2P2338536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4d196edf27caf7822e8b4426878681c233d14e93d133a52f78a47307d7faef. 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/USA2P2338555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e013eb60bfb0995af7a424e7d14cba6b03903a6ff354dde13d7bc5c1eee96f6. 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/QMAAK1568432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d697a61e15281ac2d82e2be3a206cdaa2928d4cb53548924fa6a6a75c7200e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMAAK1568433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3951ad598b96d21c203d824a6d4ab2a84246afe5eddf9b25071798be7eda894. 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/USUYG1195843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb86d1c3849780d33652ac04e9a5074346b3f893ff500ae57520def68111d261. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZAAJ1901415.
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 0x75b4cd90260583b6905967cf483e8ff4ebdc375e02a0e4ab12723d0c370a2d97. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QMQTX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f95fe5b62b85ef3442b124c34575c764eda89c823b0244573350b4f1fac33c. 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/USCGJ2091950.