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 0x89e4efdbc209c5c0d546f4b08364743d0266a41deb8da148a9fec831ea5ec65d. 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/4b3275cc-024d-4327-8690-6514ac0cbec2.json and https://artists.proofprofile.net/proofs/artist/4b3275cc-024d-4327-8690-6514ac0cbec2.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 0xb94e1cf9bd7e6ebb8a75922cb664b24477186ef9dfb01a346fe57ba43f578542. 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/RUA1D2257910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfb7d0a8652d631680d1e7c0482b6091232c3cabd949abdf83da78a4889e4b5. 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/RUA1D2280254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540a8e4bf0ca9b775c4ba7a7e0eab702d4a24d642a098e473d095106ab8657db. 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/DGA092215249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80167eee0e1de9bc7bcbb65fad7c9e9396478b34ec7d5ffed32d5f43376a22. 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/FR10S2379534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb136bf0efb023e21004db63f4d7619312446031c053cf53f1e3fbc42f062efb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUA1D2318063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5ecbd07ebb783c17cf541b9b62af88a240dcce228a83a0438e8e520c7b01d4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZL5N2325370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceebdca3d265a68ee9e24e5e32f63ee5e14cf928f1fcecd476b7ed3eff5ddd95. 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/QZL5N2325371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284fd59e1d6091c90e6e56b242409c154e4fa5c7852087f9dfe284a14867d1b. 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/QZL5N2325372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0911e2feb97512ae7e09039600803d3cd041b27c2669ead39073be69705b4e06. 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/QZL5N2325373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b773962cc7d20fb9fab5ac73b0ca0ef92a98d0acf9e97bfe55c38597990885. 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/QZL5N2325374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c016efcee3d86414068eebe1cbb110cf00d4e7ad0983c8add2c77b5fbe2551a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZL5N2325375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e672d905980968ea3d76649614a51362a8fed4e40eec2d74703004caa1f2203. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZL5N2325376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788df0c789821d33fe088568b68ce8b5081fe4b451ec729a84e1921e87146693. 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/QZL5N2325377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46861b9ba962a5044f779826c95414c3d39cd5d0a6df4d12259a2113f8a14306. 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/QZL5N2325378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c74212b0ad349006714bce9d40463b198884af19a37202b7fd4feb9abac94. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZL5N2325379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f156801425a46a89283b3d1d048be5c8930f35e34e3a9886abad1e753bc727. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZL5N2329921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d8193a5ad681cedc447aa603a00a168bd8585faef90586296ca72f7aaf7547. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZL5N2333931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9915933cfbbd9295feb77a4b6fa47fc6203a29c44c1013f41f95d26a1bbf601. 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/QZL5N2435309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35729307032bdec36957163161bc6e896bd2a021efad1f73380d13dda0142852. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZL5N2441349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b68da83b6916df60a72ec439be34983ca92cf38edf0df0e7db557078636221f. 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/QZL5N2441762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ce44f183dc91c32ac70de398e9702eccce76bd09809671359249b6bb7b664b. 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/QZL5N2441763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58022305f0e72553aea991c4d5d8880f64c8b9251ab5251138f61bb18522dbb. 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/QZL5N2441764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11df75eec2adc806f8fce300318e447c8b57029c4e4684d3e06da30c386507ee. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZL5N2441766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a4de6ef602c7754254ef3337365925831518ed4e1033bd723ff32a8f42437. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZL5N2441768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61513d73a9e7e5f6d526e5e788bf1356c6053d8ad9e701358bff2e220db3a4aa. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZL5N2441769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f39abfd64cab8b1221f9bc33e91a43f147bc9fbce2e05729059a4b175376b. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZL5N2441770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e05bc4f697a395c58f7a6a2be2738d11434c4e2253361dfc9ff8aa1972b68. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZL5N2443893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f183116eaa915dc3110675f4aacc3fa3ff4fe3fcd16c813eff83b5556c0f39. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUAH62425287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a61650855f5b899ddb8a59b35fbcc474bbb8d2f492ca61ec4d23f485ff6eb79. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/RUAH62432616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c214ef7a0ddf1858bf5683c48e3774f6b26250a86bb55498dd82b543c61dde8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/RUAH62432618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe43f9ee1f95e879efbbba517a6eac6afc7a587baa2d3bece69d1ee6d8f961c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/RUAH62432619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e63e1b5af65f5686f650feb2e779c6ea0222655d47118adaae8357edc89b0. 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/RUAH62432620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a69981c6abd3f8ed25df7016eb1450b9a61baaccdccae1b9cab97c61190abad. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZW9L2452866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc02f5cee9cd66bcd2d7bf8b71c2df0075aedb19d2847f1b07a2f2e75a9247. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/RUAH62432621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa3778f1393c202749d5ce7b65e06a19755e6f36210eb1bb3e2c67d2f7afbf2. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/RUAH62432622.