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 0x3fbc1edb0ccf4989755b043afa7271538633a15708503eac432302cb361f7ddc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d35e7c0-0315-4051-8c51-80cad26d41cc.json and https://artists.proofprofile.net/proofs/artist/2d35e7c0-0315-4051-8c51-80cad26d41cc.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 0x4c9cdc83d12fc734621b21d4cdf9ad0d4da6a9fc16acf65e6bbbb7fd6b4399bd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN42097722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390d044c3a836a694d633447e4a1dda5d5da0a2d59f60d5766c632d5b8b5aa72. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN92057401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100172cc5ead3aceed4f238a11283d530e6ea34371ccfc75469f0518a1b81192. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:11Z), 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/QZHN92057403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152cfa0a4afd57d216f5b85d12ea96aec7f807e578743eda230120ee3747ef0. 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/QZHN32193007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf014f88c97d7701e05f35b7ed38adf1b56fd7cf1394e943a3a4a5b699f9ec. 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/QZHN52239166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39212e672e6d392059fe93a5d3ae7e30ac7df479864d51c4629ce10cdbe04477. 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/QZHN52239168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993b20317769787ce3a3d8d4a504fb4a19b74d56d3ce512004c398b70ca79857. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:34:02Z), 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/QZDA82364914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ea493350ec4745d68302e15d0ebf5604c71f364b542b5cdb7b5ec82d4741c. 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/QZNWQ2478474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9767f7d5cfb4f2a7649d8a12a5ca6558c8d0800fabf49dff1a388e9c46d42f28. 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/QZNWQ2478477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f7f0e0e65570b3aa67b6b55709e86ee2de182a0a44d193faf54b87956ad2b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2478479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2cb1b7ea64084b467cc2a43f420fe5c73ac80dfc3acd6ad37bb44869650c66. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZNWQ2478480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cdec5cef69e1fc3027056ddb57491673f5c183eab58345c6f835ca49eb72dd. 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/QZNWQ2478482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec22641c6d92f851d54546a32945fba4fce39b97a1294b30a1a30c7d6a1213af. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNWQ2478475.
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 0x42e25a7a4f4a7e958b7138d5cc7256cca5a3333be609126cf4884bcd0a86824c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWQ2478476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626708c8dfd93420244d76b4b43a92eca24969317d91d45d1df62c831888b076. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZNWQ2478478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04004800cfaf7f1e99f0a9b52a9bf7001ba19a90576fa02ba92e4b16e617c2a6. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZNWQ2478481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d5a1721490ca812ea86fd3b5c617fc4211457ba9582167eba20ead328dd6b8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWQ2478483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfdc957709977d508854584bb0930b3bd694b77a5f6a70e7d9b36712aac0214. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB42516200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236244d4e48911a096fae13c4ba2b4c59e1923d41f7e92cf96fe0028ef12283. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB42516201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5582bed10827b1db8083202b6cbb920e3d7d042ff17dc831a26de26f4ef5a7d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTB42516204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46292c5910f5dbf55eba47403f96dde338d8d6b431f4071e146081f25547073. 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/QZES92251051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8429c45239c42503e99add9798614acb5168eb1b97bf1dc3e6b45760d7dcf96d. 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/QZYFZ2343047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94837537da7d3ffb3f9200c8060f70339ab5e8a8c7e80f0d26f0542acd762db1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CZUM72201029.