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 0x2f5af96a5ee623b2230ed915579aba4ac7595012c7942e1e1452217e961f6dca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2e8becb-a4e0-4e71-8d66-b34fb76c2413.json and https://artists.proofprofile.net/proofs/artist/e2e8becb-a4e0-4e71-8d66-b34fb76c2413.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 0xeaa157fb44b3e88bf9dbec59da3839793681be0af6a95fbd21536ebaa606fef1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:45Z), 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/QZ5FN2345698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cf5f5c02ffd38bbf16a02df37514f4963e708bab9730b0e97cec40fc874a2c. 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/QZ5FN2344802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5222d4fd6b0c45a24a844c41f7a2cac313ccafebb85fb1414c0d84fab4830. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZ5FN2352227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe907adc377dab38cb09e159ecd4c5ff065f5e856cf46322abd3520e4f5992f1e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLZJ2394373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d905763288dbabca00283679058431631bd921f7c8c6ef68aa29785dc21df. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTRX2347118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5aaf0435d390eaffc1c10828d20df4d4aaa232307b39f4a2108982321205b2. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZTRX2356792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e5e4aed70528c122ce29bbdc1b7dea77dbe74e646fd57a8ae7590c447be56d. 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/QZTRX2395792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c654ff495518aa10c18005ce5bcfe11d6c19a6b741bde9aeb3f05124261d469. 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/QZTRX2395799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46949287c524bffb7895cf40a9b1547c8fb33061c4c6b01e8cb5be9a3b2dadf8. 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/QZTV32303370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396eeebd3c7a0c4efac1f11e38c8de4bd5afe63d4c2ddb02f6fe32c5a946e353. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:26Z), 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/QZTV32303530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eac9efcc5252e70d98146d6d7e8cc9dbb9307e3934687aa9e15c595175219d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTV32303181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d7d6cf52311d32b839c3b799a67ac4c472f13e77b36ffd07f3eb3df6543f53. 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/QZTV32303297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34bec699c261917eacb3812a5cc4ee3e9f1cdc8f0f1784526611f9dc8e9cd13. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:45Z), 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/QZTV32303714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a621e8a7820565ba9de92c813744c08376fb3050303fd71c85526500c2bb21c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTV32303742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923caafe2a41f765c14c2c0178d2db223175facabfe11977c055fe9ba6a10ae5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:19:51Z), 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/QZTV32303449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd5984d7051904d0cde60bfed70f9dfceb37ada8a80cfee09dcbb84a87ce0d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:36:36Z), 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/QZTV32303689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918583e191f82ea43552835dbbcdab1115ed661468a69eb9538df0131c94060b. 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/QZWDE2324309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e34a50ce624b37dcd36fe8c57b6b14b51862fe5f1c2f9505bf833e087a7ca. 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/QZZ8A2429304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bde36cd8f6a513f0e62d761dbf5d13e27f9b40c11f1c9a347b32e1a1398b97. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ8A2429303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7c4bc6b736ab6fd48399d8b6633affe8d855ce7edd03a1726b2ea8cf789f30. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZZ8A2414007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914ff7e5b2884de8af211946b45b4e83e1e53cf55c4d884be7532eab044c973c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ8A2414033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26e9569bede27aef43fe4fa049e8a1fbf9f566683da34dc2282d7e68ab07b87. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWDD2545177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55d899a9cf599b2e7604d23357406a396933c7b81e563246f91f0e949347cc. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWV32505880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ff253a90f15569eec9b96814e311aaff0a8128dc199887961d1eef8cc764c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWV32505702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7617ce16b1357f5ec8d5c76e3b6e54e30b9f10828984e7875e5d86b732d7b280. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWV32505080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb524377747a4bf08ba41c6f5e39ef1a105093f852e37abde74c0977aebdebe3d. 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/QZWV32506050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa19030f1e6f3a8bf56b8d2b78ebf3bb47efe5e3cac2b6ac5727778edd7cea. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWV32506447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf33643584bb88372e54813b402200c09177763c76bc26a048c72a792109cb4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWV32506416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7cd3dd457c0b55249ac72913bc850af269fad938785ad9f269a3bf400b52b. 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/QZZ8A2515500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce096da8a4226ade2fa56bad2cf72b089545123d7eee293aa2b8bf550e633580. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ8A2515676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ea5350f4c478f98c33654faa291c4e71f4a968640e565965ab0ac43f412fb. 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/QZZ8A2515533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e19390ccaa1d28312ea1812a1619182ac3c231b9de15a6c1e3f668e1f8ea7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ8A2515478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8dff3f20b158e9ef63f3e09a2f188f25b8e3ba5ea52c3bbe03e72310f86cc7. 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/QZZ8A2512772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e035a6e647088edb5d25eb13e1f89e2a9305fbb6bdd6210b1ca7ab050f30e. 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/QZZ8A2512785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c3a12fdeaaa6e9688f8e8ce17e23f511250f836c900914ef6666dfe4c4839. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ8A2515429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749e24e6ba7f85c7bdf18dcef6fab8a8ff1d44ad9426fbac91d7efee5cea3eb. 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/QZZ8A2515464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3666bacfc12707e9e33c1b867a50eb4ddf7ac5b0663a110e5446e50df509c5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ8A2512848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cfb8917cd2ca9eae6eeac28b042a36b35645971df10146e68246eb230182c2. 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/QZZ8A2511978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013508305d8f5188c7bed9d2383fe9ca16774eb6d437bf3043d27e595fc7260. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:54Z), 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/QZZ8A2568056.