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 0xba2903c3fad5ec95414d6dd3447622ac554c43c5a8e6851c190385e057f58166. 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/d07e5722-ed9d-4666-8b16-bf9b8216578f.json and https://artists.proofprofile.net/proofs/artist/d07e5722-ed9d-4666-8b16-bf9b8216578f.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 0x75dfad37924f4d31fdc32100b5e205943e2519987a79f6862779cb8a21569677. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEP2109413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3343ecf7098a8d3d8f1263213b53d7999dd34978bff3f3ec232174425c05b80. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USLD91757737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e4eb3453da8739f7e5f9e1429b382037c210819d6658aa9e5b4cf5a0271b42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91757740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6819a147cae22b8052aa269ec8f312494cb98a0046c6d6fc365d25d8162fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLD91757743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a39a741802a7ccb4815fc1780ca4571d2734d9ce71fd65f6d979aa07e35a1c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLD91757744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f58b6d312d284f3342d9d0d33c2dae92e3354830f468a7978abb32ccd97249. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91757747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c2d5e3b8a24bdd72032c5b8c1f5f3e426c585499913f4f2b3639b6bb1d01c4. 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/USLD91757741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d756e1afc697475350315d46a1054fc9eaf33eca6d2101ea05f851694de4e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91752675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3c08d25c74fad6a4b36daa164293ead94254065101c9ba4530f83f96356e7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLD91752677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec3f5233bea14a2a3a14a5ebf69d389c23f7d1aa2714e45451a14f050c569f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91752678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75477cf15250a62d719d8fc85dfe5881fab029168376b6664b61dca831336938. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USLD91752679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413e3d2669714e728a30af0f71dc01fe6fe738e7ca651bcf4a7a13c825f4028. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLD91752681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d0cde304d58cc49ba7c95b23712a449102b142e86b88c39a3107bd23174a0e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91752682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a59f6464210e2d78047167d706a6fc5e827c7911a481f56e32d029244bdddf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USLD91750189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96b17c8a4a4d35537f5379b9eafd74ae8d4d3265b9e340eb54cfccc50866d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB72271138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d50e62d6ba1eb33676cecb39ad5236f251fffaa482f0cd397087222d337ad9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB72271140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dda63865ad24235051c85c0fc761f199c2ea6b9332c317d942f96a847918cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB72271141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ecdff5d89a44943d8846144745706ede69d8b618ca2eb5928340403c29cf6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72271143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a06ea3da1716b108162082d0e0401180e4301d16d9b110810a50f8ad26d9e53. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB72271144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9013b0695c9347b394f474e37d5ea7afa96db6c58ce767d7ea43e0e562a70. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB72271146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea07936751c9ead953c72b470940d9bda6c39496613f2ec2dd86d5e06cf0d1a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWQ2466814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b60e13870d062bd0e6af04a4e6de1a41a38b139df9392de4c7b9f48ecd316. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZK6P2476948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a946cfa57af1c313444141160bd6e9fda719915ea904cba00501448644d77ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFJ2358350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a59f6464210e2d78047167d706a6fc5e827c7911a481f56e32d029244bdddf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91750189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a726dab6cda000d4cf0c98fedf1e68eae71abbc1eb5793b6463e5bb57d8d0a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWV2370285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4df7541cd03d8b2807164d63e4b61526de36dc965900e418c3045b175e91b82. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWS2316019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60617b864bbf1e150bd2090858c3c82a42efc6f60e01ecef012ed0725e267ef6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ72343038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5fca7cfc54ce3cc27f6e953bf13bed5ccf5bb90def21c654e20dc7a7002e8c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAY2238373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d569a78daac27ac93dd9c79389b0bfc9e2e0731464c021e2dddc093c79b690. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWU2207148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887807704370be283be8cd239e62774c956c88b350e7f820368514041e0554e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWU2206271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700da254a6d3bcbf897757902e5d52c4c157adfeb1a8a3db8303b51f7ff13b86. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN92232426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462501420343d94b900c9b32cd203a85c320b4e56a17faa616d25e425918b1d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42119125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9692adb91d81d02ab1eae5503107b0a4ecf0131c15d1706baa4363de44df6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWY2164245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dabd385807e11d51a86eaf7365624c26f6b46faa1e0365ba6a0af71a05b703. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMER2104959.