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 0x3fc45bf87a417a8405656b8b4b9b1aedcce403e319bf31401ad6a69cb0fd37ff. 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/44b5ff0a-acc6-4bf9-a4a6-cb5634a6aef5.json and https://artists.proofprofile.net/proofs/artist/44b5ff0a-acc6-4bf9-a4a6-cb5634a6aef5.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 0x7407ad8b06c589aab10344923b7116928c63e38157b4f823e146d155f58fd70f. 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/QZK6F2462750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311f9705b4f404d5802d0d4329533e016bdf32c41284a249b2f1e0f3a39ae078. 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/QZK6F2462757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d59f54afb3eac03988dbe0199a8ab1f665a955c06791665e937494f26e5584. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6F2462751.
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 0x3a7be4fccce6fd8861b907afe9df9b939b1eeae02ba61c8c2c2a0ac35f364e9b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6F2462752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca184e9b778664acf9e0ecadc5b572c9b0c89ed4b82b995b1e1341fe41bda044. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZK6F2462753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13202253c4f4ad16b80120d1260431ae294d9d8b37fd403062e4e58972cbd177. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZK6F2462754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc96d95ac777646a942b1d92a502264062b00c20a10411922e7f2a9af63de10. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6F2462755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353323dcc73d9d01f6cfaef488b41b68e96479e87390bf6fa381002113359cb1. 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/QZK6F2462756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6721b4c38fd4200e279cbc1bd2f4edf7dad5b4ec67253016c88087c92d28307. 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/QZTAT2490127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68589a5261f07f56c636e6b4db1e20a7b9c8223f5920e9cec330a7a87b783bd7. 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/QZNWY2499503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49cf87f5df24e28fd2bc78a6e7c51284936b011adff941cecff4b15da29efd. 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/QZNWX2437925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82441e743b01339c6f5127354ccbd14492ab7df51fb0a72bd6727828f2b65c49. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWQ2470752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590ad2dd2133af0da1f42d8be821b204fb9b70307f272ca88c748755990d2906. 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/QZNWQ2472420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee62d5046171491c6366735e7f00a8d2c50adf4141c2aeebae4d98b4267d7bd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZMEQ2474521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2aa860a31873fc0ee7e1f64b7d72a3173b3f2200d771be11ce6933422a3a46. 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/QZK6K2432952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084a6794606d812d6b64e49c3e1f279c2ec3433e6ba1b54c3b48217e1f893a15. 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/QZK6L2473235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1463ae09b751a62975589207b2c5ffc0581b1a2561ed5137ea8c45d501d3ecdc. 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/QZHN82400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8214f39cbb0e7dca38d9a1a7cc8057358e530d79adaaf06cfd01a4dd7c0d9. 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/QZHN82400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e67c642d24794615ad4908800dfe528288d5ac3ad2b79cecd6c188386c05b. 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/QZHN82400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973049b408dfdb4c25ed25c8576a1dac32aba188c20648e0384e0ffc65f3ec24. 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/QZHN82400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e9b5443f0902429744cbc69d834562f210f6e64f863f7c7b8d54abe6e5605. 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/QZHNB2414674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9054b1e03d2404847948c61d77aeed93da55ac11efcc2b02dea60bb94812f8. 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/QZES92490503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee5623976386239e57dddf841bd0f8406d94229dbbc795941f611c82f710e9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES52475344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f72ae75bcd0a1876e4296ca4d57365d843615a723010e12a3a69459c200957. 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/QZDA72407450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b939a9d8a82326d49b9d07cad6d1751e067ee5fe392f5a6bf3e22c8ea99e4. 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/QZWFH2390684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65007a31bd67783b498137dbf35ad9ec3ffbcf8a4b1fd1c2c86121665d699bcc. 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/QZWFJ2365200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8e45fa64d1748f746328e7cc7f0c79baebd1704c95804d2de961d817ec6d09. 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/QZTB62312813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6def9e99c9a49a2eeaea869459722052ab93b6223de25a7c286c42fb71e5c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAY2330730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9f57fab9613dc89de419da31fa295c5b20aee4cea8ce1989f0b98cb02837c8. 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/QZTAY2330731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6bc031de62967005ee4cd26586d342b1de3e0a10f1fbc49c29563474d4d401. 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/QZTAY2330732.