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 0x2ac29ce6ab85bb8b9798f7f3ce0f1237e87ed7ebca81e8d65ad862a0707092d6. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c340d206-6f90-4db9-98a1-b26aaa560d6e.json and https://artists.proofprofile.net/proofs/artist/c340d206-6f90-4db9-98a1-b26aaa560d6e.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 0xeec4d106fcacb7ce9387b14a51a5130d8fa71f0b3c9c39be1f101a198c8231b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGJ0640427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd0cf13026893cad7ec2dd1f297c83ef3221f8be8b6888b651a3ea103c540f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/IEDPQ1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a759e5c63cd2fb60121d51308c9404e087c5dbbd7fb1d79c9664e60a4a31fe. 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/IEAAE9809102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3eed80ac5bd2c008eaf5ad0f1181c672ab654c786555a5f89176ad0f9a024. 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/IEDPQ1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169938904fc9c134f97b8cd673b0a4647700bbc13347fdd37f2b8c4ddbb12f91. 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/IEDPQ1800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d4db818edc4b5f568238c3e7263d0c7f00583cb55308fdd307684d386ff5a1. 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/IEDPQ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d30e3b34212e1fef281cb728e5e18c0fb29c6573669ec120f352a4e339fc2a9. 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/IEDPQ1800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cdb6548d58946a513d3963b8797aa452e4cd2a64ddf6c659abc85fd1238e2. 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/IEDPQ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0d55da009bd383ae18d04568caeebdd2a4c3927851342346265ecbfb78383. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:56:05Z), 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/IEDPQ1300010.
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 0xeac98d34b23b886e0358ad1537d4eda3be2a66a7e8d06a1f83325c7c7423ed4d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/IEDPQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea818752c12ddc9205a3083943b1d1a68ec2e67493d50a9c03d7de972283151. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/IEDPQ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44f6eb8e0ba99a9b0b1a9c454244428d021eb191c5e1c3e0efa42e20ac7e7d8. 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/IEDPQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755d19c0a4c6229b9af3f49c56c17a3d5c6e2047d9461c6bf7292a0d861714e9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/IEDPQ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3bc80ee397418a51bfa4c9f7c943cbdc7e7f020d99030a9a85e9dd2badeabf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:07:50Z), 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/IEDPQ1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493a6237af63fb75d890a8267155b3b4bc7c44f2f97823913a62fbfa41fbcd9. 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/USCA29501211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087002d4c112764fc5b2b5027454f9e248e9e296f3c7d3647b702589d7b500de. 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/USCA29601360.