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 0x52413e09167d3d90bc6ec20a070dd13ee7132e8d4b43a4fcc2769b3f75b9b7fa. 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/5090e2ce-2924-4add-b800-887cc8a18d01.json and https://artists.proofprofile.net/proofs/artist/5090e2ce-2924-4add-b800-887cc8a18d01.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 0x8bd563eb5879979c28e646c291045eb4cbada9be55517e36726f4b448b8c591c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR6V81478246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f9e3a78d715359fb5cf8d27b214023796ea2b9255e0bd0ae0ab477af091eec. 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/FR6V81478248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a68a3c244fd3b90b2f497aeb6a53ec2deaeaed14648891547e8e674c780893. 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/QZEZZ1900449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416b2377995bc0702b46d6d3ad478d501ce7482e4a811074ba012bda764b9d0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:12Z), 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/QZEZZ1900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a1af28e41663ff6495827ec741b3ed2ee937b0d5c76eb8a5a1888fef890052. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZEZZ1900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcd5272c635510b7997d31ea87f42cc56556a53911d6729b02c3944b0de0e6e. 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/QZEZZ2000576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6420edb8dd10d93ca6ff68f21373dffa23bd5ad931cb308228dfe53dfe8728d8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZEZZ2100393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a276543c59cdc07cabc337f99e152a8ad05c4a5a14b5c4f32030f69338cd4a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:14Z), 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/QZEZZ2100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd80dfbf69969db963f92c7bf6f3d38d04dcbf8f7255588630bcefb92397e4d. 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/QZ5AB2424119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7e03919994221bf1eae9041c5f49d5c4c2e16dd1b985e4905cbe37b61f35a8. 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/QZ5AB2477325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e265e953730f9f1cda8cd584904c17f414cd946ca62596b25f0fddc6caa6c88. 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/QZGLM2452834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ddf6cab00843ea33d4d69516c9a18b5d1cbc237a0ea0c53c8c26a7b035da95. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZMEP2429198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39f0c2e8cb3f49776c130fcb18e645ebd04666c0500ae00e2f189100157f13. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:38Z), 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/QZTAT2430467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891cd78a56c889f1844d43d20da0c207d39ea0de8e9c85fb83713f130a4faed. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTAY2426713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae38fd405880cd771e65e6a915d7b7c84af523368664839dc98b86117b07cb7. 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/QZTB82492917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255d236404fb4fcd68c07f7005ad76d120216b7b1c44b53082af1a4c30d5f723. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBE2417211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8bdbc3919f4a9893556b017e6c864d3ad568ec8c56e5eb8cbc60d9ff68748e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QT3F22433571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403abc420b18540b96db36c809b695f2874a9301e306bea0050dc86f82d7156d. 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/QZFYY2523760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b3b05a5ea0be9c0ee7242c31ccdc13077476be1a38208a143d4221449defb. 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/QZFZ72577582.
Always Remember Us This Way (Cover Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13f61809bc7b0de3085034abe210c5ba894eb15d591e0776d39ed11ea20f22f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN42557228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3555b8a851e23c59773bb2140dc6b4561aad850c81da240eec6e7ea42eb987. 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/QZNWT2501342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89260f7fe5e3c0493d952d95b2c49dbd797971b36c4e8f3ccfa6c0267b127f54. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2571809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90ef2bdc72723f1cd60533ad6950cb0e8086af35fac2091633a58b8b55b9154. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBC2571810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266c4148041e39d191dd3e32f81c36847f0edc6907a0528f3b2109dc2799f89. 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/QZTBC2571811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b74556d310c2fa6f14ecb96128f251f5bedacf0c49d69a7de3e4fd8fd58f51. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBC2571812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e146d9112900f6d98fa3cb38ceb1b18d4cd9cd2c1e7887d0bba31bf33c91507. 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/QZTBC2571813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d547fe959e94900bce878437dfb774505853aacffafffe1b3308270e83174b4. 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/QZTBC2571814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0b49b93e01a33999a0c6a7643621ef4119febdb72fc57ca5d8ec968b0e2bfa. 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/QZTBC2571815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3cf7a87f27e1c23881f18e67ced683470c3ebf1c6d103945c5fae14075a828. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:22Z), 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/QZTBC2571816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78abaab4b6e2e0c6d843a885bcdac8fedf7e43a2f7316aaa5f6fb45afeb69ba4. 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/QZTBC2571817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ab4f9d7f4101c1fdc3d4a4d708cb215d3e73bb9a1e6a2da388c5025699a2d5. 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/QZHNB2365784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9229f34453341d30c525813fc01599ca2c51b00dc2adf79a110af27c0d2e0e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ662354090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc500711268c767e85d451d353e23e32dcc3c87446a42d16ac8ffbdafa9da1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITAC21600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bd9be4b800946076925792bd7a58c28e22d05e109e0a472646ad2ac4452260. 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/QZEZZ2000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac2b56b9f8ad34e19f064271dd31ec1dfb1e9905c41affebf6c94cc42b9fce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZEZZ2000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1402ba651f411444fb74af60386e3ad56a679eb0e5af143e7877965536ab10. 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/QZEZZ2000368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a85416f35b0a11d51492957410f5fac0d708a0c43a2f39eaa0f589a269fb728. 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/QZEZZ2000370.