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 0x6f8e66d627b898f1bbbd13167df2ae7b170c679543c86098739aceecab229ecf. 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/ed3033ba-6705-4849-8fde-e37ed9347c95.json and https://artists.proofprofile.net/proofs/artist/ed3033ba-6705-4849-8fde-e37ed9347c95.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 0x6b1e2d4433cd37ad04dd7b18c74c168d07d03203d7564e106bb85428f3f8ff72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ22383812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0437402203b0c0a7ff42ac4a8bea45e7eca046938166829f9455bcb65c78e25. 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/QZFZ62378163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7f9cca8cc8ba7500732096ec9ac85c8a80fc7f4cb9f3f3a5812ceb0d587596. 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/QZDA62364274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21622f9c4113ec3f370e328c869161688b18b775a183e0a48a2cd3ab4a114926. 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/QZHN32380649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31fc7b313791aa603e71914b0b4e50f73785cccba3861ace14b4d03224387bf. 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/QZK6G2356231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d55608356babdb8bab9a8e3b5183da48a9c009f957a38136ae8f140cd69bdc9. 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/QZMEQ2368879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de6f54fbdc26e484eb4332ea568c8a200bedd124930844b5fc34cf87b8bd6d3. 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/QZNWW2319307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77581c194319dcf448d01e8a6d580561bcbe27e3faf957235432d76be2a5ef7. 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/QZWFQ2367598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a05bd6f5c93ed20cf6ea651b495376fe85eed23d1ca9138d49c570407ff442. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZFZ72451341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf17bb82a64a6a0f67586021d0331068dda1fd9ddf74204a12dd3e5e70c2b8f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZDA72449350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe560b1be2330b06150b1980bc7217d342ab882c8dc0bc92d71455d06d64d6ce2. 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/QZDA82491998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa901a7d044f602e0d272a1b119e2c3df5416183aaddce05687ed26184eea52a5. 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/QZDA82492939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390325d62c9a91ae56178379cf351467d694147f51b4c233d34cd10a9f98769. 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/QZMEM2432204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf45015de17d2857dc06540d51a96f499405c73f1a5a1be2da78ba12b919ec3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMEQ2423879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9604c254c13c3c7ae037d59f945c8c85f4ac7893f6e5221549d3c6448b9e49. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWW2419207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42667c8bf8bb31112f203a384fd31c0df21e4002a65c63a5a26235ad854daae5. 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/QZPLS2489200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0ca661cb54e162a027b523f87c69faa6fe79c4ef507fad95ac7a4c4b9519f. 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/QZTAZ2489200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435fb029da2bfadb9cf01dbdadfc7eba19cd4a799594077d39add683725634eb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB62425042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393139a0bdc1c4dc14d2e1f756b0a288351941d06995c09e6c56df2b75b1b8b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZWFU2425560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d6a7973bdc913f6a286986bd5dd1cb76d5efc712c2cfe727a473d4c6f4a21. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZZ772485947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86adcd98a9c13e0a5a00a8b003cbbd0cf9c6d1306957036b31315efe72cc1171. 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/QZZ7M2410760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e9189a1c0647abab8ddd80170800243fd64d649dd458d2d5f90a72c6e0a9ec. 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/QZZ7R2475025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fa0833bda9907181c3eff506f79055f66bdef7ab0c251b3e41819e4451ed28. 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/QZZ7R2475026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077e9526b0a649fbf572b5a04644e54bbf4223cbe04829a9bf28e0644df901a0. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZZ7R2475027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a892b01095765058a729b3c2e4f073bbdad6710c011d0fc4615dde24376dd9. 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/QZZ7R2475029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3859751033c531c2ea3b4767ca10b5964e8b003412b41f9d8c28f8c6cdd56f5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7R2475031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d529d920a1de6d18b1cdd97c7b3f75c75f4f0ac1de0f9c6c698e47bfb715f25. 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/QZZ7R2475033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa513b37029139bbe957af8cb78d8034134f760346d1280821258776e78acf314. 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/QZES72528981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e22431ecb0de7f281527b447a7fc457cf88b88f35235412ca1f441a8be8c01a. 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/QZK6F2580915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b5816f0643817e914bdd888fa48c29b295a45506f11cf2408de592b61e5159. 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/QZNWR2533313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5b710266c89b2a7903d74a707d5ffcd51a7ef11363b955fa2982e57a6f79ba. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLS2508588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b2d1bbcd21529ad2618cec3db043b706e86dc9ea158b2868e1535bef0756b. 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/QZWFV2570092.