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 0x3a405ce67be88052ab116273b1721eae60af32a89087cd9e0b42e728cec73a15. 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/3b4d8457-6853-4b53-a872-05719299aab7.json and https://artists.proofprofile.net/proofs/artist/3b4d8457-6853-4b53-a872-05719299aab7.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 0xbaac97c9ed5e6d2fe43b601a44560297d0aad7721b698ddf59c39c5c86df2dce. 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/FRS182023733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464321274590d06b3d2ca558a8958a4f8a3eaa8a68ec8e734d63c7b48462ccd0. 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/FRS182023734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179ace19defadad69e4c1dca006f36b63527123e4ba6cdd08e0776dae19dd62. 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/FRS182023736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afe83b7a1f5dd811240cbc21f7864d800381ad34c73472aa8aa8412687ab55. 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/FRS182023738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd179bfddcce825879bda2ed295534b38dfef8214a6f9b106237409a2c3249651. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRS182023742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b977833b4b673c258c367fef935c42093476498c68d275886886f0e6351a02. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRS182023729.
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 0xd4745de9613f52fe6351e35b7ba3e0f47b905358b8e537ccbea11980b0862ea9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRS182023730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9022571f3bc0f6512fefed128a6d23560d1bc4aa72a41d07d3901543bae2beb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRS182023735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202e7434c00452347d5d5898ab53d9520ba943f37e2a8a1b47aeb1017e7c3c4e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRS182023740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469bbc57991cacdc22b677cc5f7b87c0392302e1bf6109b061b13c769e893ae4. 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/FRX872021596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1511e47bafef556a15389d17d788b4758fd5147205a1344cc4e4c56903fc86e. 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/FRX872021599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472295eabbdc730e17ebbeaeb660f800e1276727cda24af959dc376f889a2d07. 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/FRX872021601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db5746478f946913e1e0847e35dc33e7393c64c711e43199d9e2a5a392f09f. 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/FRX872021602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd206049c8bbf0f4f5854f7adef80403082e1cd58b8c9161187f31cbd8504343. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX872021606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd20c85b53942052d2df225be8b6e914c189dd0de754452ec50e349f6ba3da83. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX872021607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6290a11eb4dcc73ae1c4b176796654378e3d927340a0c9466522401a72f8a1ae. 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/FRX872019213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fb0b5f864824c2c911536edc2df22516c9e8a8f602c9ddf632d42c19f14ed0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872019215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8344289596a38b26350063a108904335c952b68b786756edee06d75d32c43343. 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/FRX872019216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0cd45576763f29f73e96172a5f1af32700d6238505c4c35ddd9f2e91b72c7. 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/FRX872019218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ad8832246f3170ec12ae192503bec176772cc675b44eb2333d58ceeaf9325c. 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/FRX872019220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f3d7e0807bba1070ada928c882aa4503b0bfae620333fb7c1d3bba439f471. 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/FRX872019221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ac07630070cda9fb9d1e5a26dc2424774585b18d6d01e766123ab259eaf74c. 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/FRX872019222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e226f6b06f7bd6393029ba5762d7e8746bfd5b026742d8f37f8ed5169dea9a. 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/FRX872019225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068aa93a66769c1d78c85a8d55548e400212123bf6380f2266ce69ed80b4e639. 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/FRX872019226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e5a3b0e0640892a1fafc726bcb3e5dbca69ee948931fda6bf1a80349fe387. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:29Z), 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/FRX872019228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a6bf7640f426ef95b3d66c2e6e3eb0b6e565b61ca9190a57914d58d8e39f41. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:37:04Z), 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/FRX872019217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39a226bab1dd7816a3caba6d80a75567bb11006af6762e2679fd8fd52262fdb. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRX872019214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf534e12a5612317a3e464b9b958468a2926162f5633b95a8d996d7dd60397e7a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRX872019219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd96a32cb8dbd3d2fa28a6db2d28c203ed9c5e4638805ddce76c35a3654bdac. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX872019223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3043963a0c3701326047c01f79b46ad5921f8788092972f5e965abdfe60aac02. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX872019224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0766141b98424107f6d9dd1b0c899ffb0025d6e58c6de560a51e1216c84e6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX872019227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c2fb475ee2b3851dc613a52f2cbcee0014f4c98e2360f5216bf5f0d88942cd. 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/FRX872021568.