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 0xce64e12955c007e8882c4101a7f9b386024b76b090b8b3396ee3fbb1ce279c4e. 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/ee417db5-9cff-48fb-9545-6309eebbdf7e.json and https://artists.proofprofile.net/proofs/artist/ee417db5-9cff-48fb-9545-6309eebbdf7e.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 0x17def546b7da5464fe42d22bc1f70a32bac1cceb3f444f1c68ec454569eda49f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NOYOZ1702040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12459a7ca79c0c115482dbae50d2bf66ce502353cfce4ea2e0bba519cf9a6e59. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NOYOZ1702050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35558d3442793d2afed17a9d6ba5da04132f0dd54d74fb5aba81731476a91e07. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/NOYOZ1702070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5599160d36d1948b4d133d525976f6810f5603d3d3c0aec7e236ac1e001635d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NOYOZ1702080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5a303a3ba6b6677c61dff5a2a4ff33c570c01d6d81b544be4aea612b2c4ddb. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/NOYOZ1702100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e9f6410dc26d2ae82bff70a78fdee6b742bd829f262b95c10cdd10dabef101. 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/NOYOZ1901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c2c13a290ceb1b4bed5bb51572ca1cb564869a246c180457a37e3b20c639b8. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NOYOZ1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6feb5331a9d2fb7f839ec46dbb0f2edecc979de30487da22c7465a4e58c3bd7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOYOZ1901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de5730360113f3270095cbb5ce209b593e68b97ff24c49c4d26d37fc0cf944. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NOYOZ1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7f54b836e4797a1c56dc33b600b4c58fb38c2c47b2fb6f951e20f9cec5e4fe. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/NOYOZ1901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60994c1c84062494872eb0d663c49d3b4be8920507d1dc12ee118a8fef9a400a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOYOZ1901090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee45d2c590ccbc1be19fed2e562b5ded64f389c5808b0c2f118eea134d6d642. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NOYOZ1901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ff3c9de8b0a2c4e55a5ffb7fb4493f22b1de3ac0f9207535e43ce0cac5c67. 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/NOYOZ1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77bbbd4259b64f63c7804f1256cf8640388d920c45f480fef94c741a03c8b2c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NOYOZ1902020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1687b063f3b5aff1e5e38f89126dbc5c50c8548ad60deb3094083bf8f5b62e9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/NOYOZ2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7af942c5ac5cf8d47d4a7245558e35c51f81362583a69c07b03db1c2e2f4d1c. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/NOYOZ2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fe48dae083bcfedb0bee95ea81653f24a113cf3903e8aafe6400ec15ac43d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NOYOZ2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab776a499cdeb7e3dbdd1b0ccc438a27bcf2dad4ac9dd9b0a8681fd1f0543207. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/NOYOZ2001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19def3b5d1318e97232367256702c7e114198af13ab3710eb76885981e39d6f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NOGTA2112210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087e1eff67fa2517f7e80ea8ec68674dac0dc624f86b759a693d62ecad28c28b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/NOGTA2113110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beed1fba5c0e064ab4bf8ca28a24b6cc7b96819c290bf5e57b785e07d7e45e3. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/NOGTH2115310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d2f554ee7179b1e6da1beb65741d2643547f3982e566a2a2ce57d3741cb86. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOGTH2115810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858b2c1587f31218507522dbd6316f596c0a120bc804b129aeb2ec50fe2795c. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/NOGTA2241510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c421cb67db23a810dca3039f7c4f7d7f92354be008355f5c688d9f051d154a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NOGTA2242710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e34d49cac476cd09d4ffccccef28966da06a7c3ca2f651203310d5514fcd70b. 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/NOGTA2244310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a99237fee03ff574d8c6a7847cdf801e2b0adc0acd5c97684ec4d703775d0e. 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/NOGTA2253210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d7a5f17d013ca79185632a5bb224816b27b4d350614c3371a244a46b340776. 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/NOGTA2360310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb64dc233ab6591bf087e35f16ea2bfb2590f62f449de2335c2d1b750675405. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOGTA2468310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca82acc820b1eccebaf39b346938002fe363046b6a52ca93702627308395a75d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/NOGTA2472310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733d70bdcbe0c086ac8d4c31692d2a08102be0b36813fded3e86fb194095e4f4. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/NOGTA2476810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0210d78fb4ef2de45559ebf75c7b23f5b07cfc5c3c41190600e1aa5e7f89906. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/NOGTA2485510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da67ea1cfe572ddb34aaba44ff1f78c9b1d1808b4a1efc40101b4bba94af04f. 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/TCAHJ2317964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2e5e0e14cf4993dc02f413b22aad8074c3fe3e7d998c4745b801ac866aa93. 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/NOGTH2116210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de9fe381605d9a4bc0af18b5b6dc2ed51cd1dde836437da8e7b7bd1f73f4b8. 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/NO2DY2400455.