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 0x76fd1d6b57a2b316a93b7dd7123bf5d7c433f1278c697a7fbfa60d180226023c. 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/b20dd027-06ad-4d07-9402-a270e28001f7.json and https://artists.proofprofile.net/proofs/artist/b20dd027-06ad-4d07-9402-a270e28001f7.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 0xda1891ee4436db68e5bf393b6e5ce711abd05a2a5f49a7e83eb5e96a5efbae30. 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/QM24S2207144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c07023e04756d3a0a265ab55360c6b7f3fc88431753e22be5cb5f5d0f05a61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2414462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843a224d5a89963fe182a2ea33aefb6fa96b3090ebebba4b0a0ad3210f95a52a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2414461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ddc15224f601d8e592e01fad8c90031487fe0236faa47348872ea9086cce6e. 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/USANG2411216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dea8679fe2edd51a9c78d2e14b9a7269f5ca6a14563f3587037f82c1e8e451. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2411214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c6550246c99c6ec2778f18f53ff5447ec49a7dcd0ed020d9a283d9384617a. 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/USANG2411213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee49ce6f433060902e749adfbd80d4c106dfe026e7f7d757f1c527d2eff43a. 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/US3DF2420939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d1ca9b455aa44f6d3ea0352ac3c18ee5b676be7510885de736de8958c3b0a. 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/US3DF2420940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5c2ba014ad7f5f5849780bb543e95fd3a54661e4c3b77fb997c0c8ecdbbbfa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMANG2248530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f69f0c9941fc635e2b8bba40ac2935eb758f98e777624994aaabee28ab838a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMANG2208852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6c66a9590f37420d4576bba4de3311209673d952b8595267c1ca8a3b1ed2d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMANG2200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12e158c9b5c7d670f0b295febd680f1de7d772e330f47f21ba42f6a0c464959. 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/QM4TX2377553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a7b9f4ef65bc8fcfa3216ab8ad6ddcd102483d9de8c9d0b009f7d0371f6f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM3DF2248761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834bb2af5a3c3fd0b5c920602213fd76087226ce4847098b6d4a68fe937c82b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM3DF2246914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769679fb20f70f785ca58b07108efbc67def012390b1e4cbd1e588c91cbf3253. 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/QM4TX2377566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975fe9ca1c8b3e574c30fb06081ba38e79d20c0391aa15d301d7e29b5902c23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2210915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208c553008ef0fbf0ba06a09ef23b73f6acd57249bffdd235698c958d7fd945b. 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/QM4TX2377536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3223f90994af76795bfe5f5f553567983eb6c7920629be9acf953ebc05111839. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2279171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3134ede423f4ef1bc961f56deedb67a913f7977c81454dee74863c4b9b24f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2262541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9133daf2f0d3874939dce926e287d6f1bfc509bb90e8bf9b493c9368f05846af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2239276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4110f4f6bb740af673bf2b49ac3210dd0625c482093d5eeb8afaad2a449b61b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2234686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b271a6037201900e755632791dae542dbaf41976d564ebbe2db013f18678b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA72224473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c50d22e64511f86575edc5e226b869d67b05cb363c08de7cc18a487241e19. 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/USANG2216727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ddd82e0d975a5385bd673be836070e32918ed78be8b092b648e2803b99fe26. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA62204581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ede8a6163156f3f53a82b5c1179abe3586e3ebb91929811fa4a1f2fc22040e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USANG2202883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe53343cbe27a765184a4e176d98a14ae133add68f82a80d91576a599cd53755. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2281840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb287863d02655fcc5a342a857eae189c789d29c4916a90ff4fc791e5e0984a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2279107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6554762d77db869a0a32ed06a6763c59bca36a2ea3a8684d4933dc93073050a. 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/US3DF2269043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c55cef172bc7567dbd60e444f32841932dc6d5b8581d03d4579421138e66b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2269040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2206f6b9b3a397c95f727b70b9bfe8a169c1651d8f5e65dd58c50c0dfc566d5b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3DF2259283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12485bfd0bded693e610ff592f032b727ae306ca332d1a1bb1df6e46be3f98e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/US3DF2259284.
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 0xe8412495356a3a3ae41166148660a095376d967e53abbb6e2b4208f1c668e324. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2259285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33452f92fb2dca78b703be1f91e8137795775fb72df3be976533c3a806605436. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US3DF2251287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ce2198cd8e748a6696c5e7edc8464f99d42262724b181da48aabfd327dc6a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA62294118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa637287cb1e0be49aa223905c177ac4971b72a3a79058965a1f03acef22cb4. 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/QM4TW2288893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919ab5ae9b04f5a76d08f474f4472bc71b0769075fb8d284e85536d831a59c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2213848.