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 0x3f4475386612fe64053410ffac0641f9f632a55d95f02d7501978f885693d61c. 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/2fdb96a3-7ace-41cb-9775-ebfc6c813ccb.json and https://artists.proofprofile.net/proofs/artist/2fdb96a3-7ace-41cb-9775-ebfc6c813ccb.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 0xee2de3436e48c5282f99bd56c64b841daefea465e37a8892243033777a63ebc6. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/ZA87U1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce101c2cd396dec6c66f6344d521b89b4d3490ae21bc3851c34041465473b7e. 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/ZA87U1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19104e0178ec9741445603f2f39ac11cea849cfc6a6d1bbb36087aed30b593d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:29Z), 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/ZA87U1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4ef3ad05e24535b7f9968b86236639a3a12df2975a1846a402ba1aa53de9e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:09:01Z), 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/ZA87U1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55731f9a98c4d86741f768c20e3acee938493ed20afa5c2891d207fd55210531. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:16Z), 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/ZA87U1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af216c70f8e7b25b64ef79b20a1616fe35cbdcb817b862653b62961ea63c19f. 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/ZA87U1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3de45794ed38a634d6fbda0b90e3806ba4369c9e5bb0a53eef24ae9d183b66. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZPLS2141220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814dc3f8b896f1b2000b61d54bcfe2912132b18599e64715498138dcaf358a4b. 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/QZPLS2141222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f3a363d91f1b1e55d923f11b3e457ab97becae776b96a8c26e2c7ba75576f. 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/QZPLS2141224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736d9b1bba7e471873a18978924afd5263d6eea7d56df8768a760bbb7f9e5164. 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/QZPLS2141225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd743bce014e69594096631b5054e7d13a91bca402a33359ce329c34b11dfbe5b. 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/QZPLS2141228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf026355bf66d364a475f3a710ec8827a66cb937072a46c623ee2be3f48769. 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/QZPLS2141231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dde8f8a9e189e2242415eb05ac19f598a3b528ee90331324abeb0c6be595a3. 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/QZPLS2141233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99a4828cf7f546450db27f0ed6bf216b43a8b3838c9078d6783dc2891303b5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:09:41Z), 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/QZDA82276033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eba524c58a924556be17793f52c8f50ca0a79cf45ebccfd136ffc1d2628c76. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDA82276037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a72c6b205aa6a19f45efa1b250b616a983147f5d08912b600a18f40d16c60b. 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/QZDA82276042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2da04ba973a5d054b476c571693ef576c32533301b8f4ba1141066229997a9. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDA82276044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6150bef4765fc62b7cee200fa5e4ad17efe545ef88ef6ef60053acf867efe. 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/QZTAZ2295583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc6ebcc3da79553bca6d5876631e38fb6ffb1ffbb8757c721ce6be97111508d. 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/QZTAZ2295588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba40ff2b172c66ddc6377ee1256932997f9677fbe4ac932c48976742280ebd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTAZ2295589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7628fe4618747bc02f0d26f650eb87d90665b5e5f3a4cd7cf3c267deda5d2a. 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/QZTAZ2295591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35c734aa7b598fde715005333a40aeb47241ff57781180ce66d96b2dc990b9. 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/QZTAZ2295592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf37a7671b68b4fb08bd7dcff3e4fa26f512bd09a5d214e3670e9e2b15bab21. 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/QZWFE2377547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf38fd41dc2fe90d3314e33b6800b468d4ab954f26fdc8a61f4d59b82e703b48. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZWFE2377552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb183bbfe492d9c983bf79f3a6558d03cffb7952c9c78cb99e0abccc31ca8b9df. 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/QZWFE2377555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388c41be68ddc01307fa953b01a2da5ec6a7fa0ab25dd2d21b5317de94495a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:06:15Z), 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/QZZ7N2402826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb79502274a1d7212c8db235b3ddb7c213cfbb4e1dcd457e24d0d8dc207c342. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:29:57Z), 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/QZZ7N2402828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a0fb869acc5c7ac3adb8b23e307e6e4421694637b38d98a93daef30bcedec. 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/QZZ7N2402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243438ff785d0603b1f806ea61adaae925d435312142b8e6b6683f98d678c957. 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/QZZ7N2402830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee8d6aedeb552d40ff8058595981602ce186f40c7a1dba4de54e42d2a295729. 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/QZZ7N2402832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f24cf57edcd2ce8e3a29a5ccceea5898f6ad80ee1384343707793725f5fca2. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZHN32540971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f383511057f1afdb9f45f1cb53b74d9873f8afcb1526d4a0ccf5013e2263587. 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/QZTAW2531209.