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 0xa1a6a7d1682fd400957865172152839ebaceba050912b426f8b1621dfea067d0. 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/7e07e0cd-9cd3-4098-b163-e2c3e216e7cb.json and https://artists.proofprofile.net/proofs/artist/7e07e0cd-9cd3-4098-b163-e2c3e216e7cb.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 0x94b38c385d9a6d87437b8c4d1ac81e34414a3ec632729a4fa52cddf2f311bc33. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/LBA132000938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e2f40c2d679a1349a4ca2f0b8189b322538a5ac08ff7bf27c4da0c43e3e82c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADF1732374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4742ed2208f73d11d5f2b228109832ae48bb021cc3ead1d0a507bbb7b63d17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADF1732378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe761dc72cc5f50032a6df44dc2c7f9843cc2ae877bbb714c9b83a42f598f9db1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCADF1732383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb751d308ca9f99cdb10f1dc48f4e6b06d90910c8cf48196b6f1ccd732409dd5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADF1732386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0526862cc7d34cbdd759bdb0193f234ff65096a559b2613577ed778dde41e. 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/TCADF1732396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4614c9248a2e9f778d48755a8add5fc132fc1b2bd9840d51ddcb4567b889b385. 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/TCADP1862115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9992c936c155cd4ec8748f8935159913f02560e2fd05730d25a75b1ad5dbe4b9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/LBA132000943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5536c91727f27c82f22a9a8b2d1045a4220d999bc3a11a3cf937bca13ccae9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCADT1847754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d222b88e10d0b5cb3e7f631a9068b378df84348fd7de5a3e107bf78ecc5ce53. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEE1918849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51e1a037bf6546b5b3b36add5deb2858e3b371f1495891412dd2afc3b188f10. 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/TCAEL1966219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57376d0e25a121a6027cacda821fbc3b74bc88aa73c75ab5b8240b5a291f44eb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEP2054824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d8c965d0d5c309482ce4b0a16ddb6eb366fccc322da0efd409765409374a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAEQ2031823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb8e92ef32974658bc362122f4256f4b4f9d056efe4f05553c6dbe2053ac58c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAER2031032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b9afe0479ad8f49c9cd8fd75077589c0dcad59555232d0b945c907d7bee324. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/LBA132001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36c4381f1a076b9a9cf84bb87f5e899c3ed9b390bbd49547448710b3bf75d57. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/LBA132100566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4931f50a6aab6bc2cd964695ca186af299feabd89e6121172a9f7ba75a05960b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/LBA132200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa742fbc9af8442f426fc1eccc4a720f1257d2c27b0e0804335a4a4e875a2cc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/LBA132200953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee6a08f820b4d4003e8a6a1cc0ac4511fddee822b4c6f4efafc7a9c1878e6a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGX2316802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f0c3aa9a6de904413b3a47e722a350ed2235fc9521e7d2ecccfc68e383f8e. 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/TCAGX2316869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb878ead57c7ed6a596271a82c3816865deb63299607b9028f216ad110737a57c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAGX2316900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac97a2cb7dda3c9252fda340ae141ee74f987b485691cccd1afd6f4d7f68322. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAGX2316910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6abb5582df802fe770599970038b9c0371f633c5d1f7aa9bc04f7008847faa. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAIB2408473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12879bffbc140ac54669d33dde188fe43bd6faa8ed33b11a3abb894867c3abc. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZTBF2549191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5869d73040ffb7db1ece243ff845568cce83f8668dfc21b3bb8110eef4d23cb. 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/QZTBF2549192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5869d73040ffb7db1ece243ff845568cce83f8668dfc21b3bb8110eef4d23cb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBF2549192.
Yamore - Francis Mercier & André Soueid Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5505e8e06c1ebc073bf6394d3606bc4846059b146c31fcca342433da91a1f9. 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/FRUM72401570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f72212a4c58f2222d2a91886ce1542849f94a75a1afb8d7a97c8698a5e1e0b9. 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/QZGWX2162184.