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 0x3529a409f8160745ace72bb427f22f6290c341795dbdd7b2535d8e57d8831a27. 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/def85ceb-d314-4bdb-b0d3-615aca1f1b63.json and https://artists.proofprofile.net/proofs/artist/def85ceb-d314-4bdb-b0d3-615aca1f1b63.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 0x34ddbd4010c51d235d18a5e6d9c887e2c07b95988040bd4d1c286d6fa891f95b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:25Z), 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/MXF399802229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debe184c74e2af9c995dc3e52cde6058cc11a04e66c401206d1761ea30d2eae. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/MXF399802230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfb4c9c9f4b9eb6337f9918c338546457df387461dea51e0b6c254cafac4dae. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MXF399802233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18980fb627aaa728a7740e62cc9f5bd5e0efc1ac3f55ae33f895c8f825c5415. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXF399802235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b76a9225a92505e684e28244ab1804a2a5a376753815aa32b021c823709544. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MXF399902482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8bddd403f2fb881924ed610094f94064c66c04e26db6299d61149df3433ef0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/MXF399902483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbf103f4fa0d8cd0b74373743c061ca8dc74f40dc7d656344dcf1fa3db7ef96. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/MXF399902479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47294420c1594fde118ecc374fc0086fa7b0ae1567476368d94cb9c48ad8a80. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MXF399902475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae736e078ebb2269960b3211d932b4f3f609cdba1c6d69d926c23cffd990765. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXF399902486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefac3d2866c9b9150a3fc89e37c44adbcbfa3dd6a025c6ed199df87b6c34e5c8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF390002677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b36f1b4582f234ba47411bf4e93fd2ab9fbca126c9c109e35efbc2b5297996. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/MXF390002683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd2081f9c5db99b75c24e05a965cfc432c449afeec915c4564c871817e50337. 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/MXF390102907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eac93cd3ad3872678b1ae4a68d2af5ab41cf36919ce9ec33ba2b4c3196d729. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:11:27Z), 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/MXF390102912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe874912f752b5d5dc1d87abba16fad602de64f1d02318550c7c0ea49766e2521. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:24:48Z), 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/MXF390102917.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec9ffdde74d2245b1661f031d79d7e85e248d3303b6e0abe38d7f26b32f9e2. 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/MXF399902473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975669d892f5c4109578ae9f091705f07b07086b455f71addb4c4bdf258759a3. 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/MXF399902463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d346728513ad81414a2acff0d72617cb3708f84fcd08ecc0921bd60ed67fe98. 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/MXF399902462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f1f84af59f5be438fc1b9109073903690dcabf86fb609e140b3f14c9ac939. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/MXD481812362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09705ded6057343e66fa11f9af08dd3cabead85b1be3c2d68845dd5d55ca139. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/MXD481812392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915d95238f6abda5be8b8e8e8e690400a21082687754b42a908daa7d9c6383b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXD481812412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbdcd40341ab064a64657d57ca010a2054300630d8b1a7673395571aaef495. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:22Z), 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/MXD481812533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35010e9f11856548f506f6c0f9bb664c9eb925e5c4261f45d63de1b453233ca. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:25:57Z), 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/MXD481812391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6a5f9ccb3b1269bc87dd570f41f4937bf00c330aaf6b0d002b92abf4ba16eb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXD481812539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63c4fa1737ea0a3c21e43971148a660427f04aaa218e217e0fd7a2e82614ffc. 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/MXF399902481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd376c38a04764d58f1c4fd1c8fc21a7b846770b1c468ee0e21f9647a849dce2e. 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/MXF390002676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc646c75d201a5d1d45c95dfdc77cda6c9cbb4565cc682f07b81c384552da4d79. 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/MXF390102905.