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 0x4c832f62caba6b550788b179fa455552dd17dd02a32b90f768e0c773b617effb. 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/417ca1ee-7b87-4651-b5a3-c5a3e3a9eb87.json and https://artists.proofprofile.net/proofs/artist/417ca1ee-7b87-4651-b5a3-c5a3e3a9eb87.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 0x882995ff806101f5ab417ae1e22cd3e38d6cfdd959cc1060f29c8a0508089f3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:46Z), 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/QZNWZ2084899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257776ae5683fcf6edf69f6e1783a7f3b6b1334fecc7062279c537f6e7a381d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:39Z), 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/QZNWZ2084900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c85ca3ce30ebe10d6bbdd2e0d8286d02d62b3f2dbf90a43df3d0a9c3c515509. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:00Z), 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/QZNWZ2084902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3471c4de86d84752804833c7e88b8868d05ca5f01d7d06a74f4709994a5fe1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWZ2084904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072c20641bea051638209c77f0bbeae1821c6909b227ff7c56f92ea41d9ed4dd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:40Z), 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/QZNWZ2084905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188c3685efd926b3157e9639a5f310f906335e5b73e0cc9cc9f6d3a98f50cb37. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:41Z), 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/QZNWZ2084906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac043f16ef68b7c6fae0151e42b4de939ef9c7f1482385dd98e5902dcb8f8a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWZ2084908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0bf7c2f43ebe7ebf2ec11ab41128f8fede08a8ba40c77c5a002994b05a81f8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZPLS2036876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130eda8034b2dcd88ab427e2aa0d88e80638b47205ad7d24dd87610270602910. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZPLS2036877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe05e2e763f69214dbd516c0838074e990722bad6a34bb3d9becbc1ccf8b01. 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/QZPLS2036881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78364a1005290a1f42102a3f53a50d76178acc468fc90ea3dd9cb6fcaf45bb7d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2036882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf2d191fd99b6867beeb78402b7910476dcb2a1786f051c9816ccac44621fcc. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZPLS2036883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6f989a339702234097ab29fa31bae9b4d6d464df331cdd7c50f3e71c566178. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPLS2036885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad270731264f3f3bb9fa73cecd37a33391c6001382b6364870ef9f0a623f632d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2197190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e619090a3787308cda30f209719a7d549059f97a8f492359c81c27782be9fe1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFYZ2197191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3f6634b778f490fcd37d0495ff0d064c400f6bc57f144c192ed916852f982f. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFYZ2197192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf3c2ebee9f768f1bf6f2be1df3bfb24c21e0ed7891a04c3ccd5caf8bb1ba7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:03Z), 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/QZFYZ2197193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63bbf32867483cb89a6c40c2a19997251d6514d3a48d7313883ee624fd7f1c3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2197194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d85d9984e61916dbcb986e149ae2591dc2864dd99e079b9b110696c5b6cc4c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2197198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff7ae11f3964909c0b072dd12cf6d089ed7102c8ba2e868be56dff2d64a5f8b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ42133315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd870ff00fdcd1b844d29b16bac1fcad974759c44415e57a474b42349710bc76a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ42133316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b92d7a05770f2f8ebade1a54b7ab1c7610c8f5fd726e548cd9b7532ed9a03. 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/QZFZ42133317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb18c823f9b76b5aece1e846e33123766943ab652137ece4e3c105be99b50bf. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFZ42133318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518bf458167bf829bf90d84cc33bdc75e1aa4e225a54e06f6596d73024b58ab6. 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/QZFZ42133319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b72ef0a27f1aff1ef2a3398ae87594c72b21fd3a1f45c5117984291ceae564. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42133321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d09a0b7b6175f96bbd2b5a3099c7906df7787f7c64b16b508e1fef97d60046. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:35Z), 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/QZFZ42133323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d6ab20af365203c42a13495f95eb783166f9bf2dec270ecdbce8766a6a381. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEP2131392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2ab1c3b3b66ea6e2805d7b11538c0ee51073d5d19e5a802d62e64ca46073b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEP2131395.