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 0xcf0c822c968a0945842723527c499a22566cf0bd2b671145e565dd2a88b4e626. 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/e554ed4d-3030-440e-a295-85515f3e10f5.json and https://artists.proofprofile.net/proofs/artist/e554ed4d-3030-440e-a295-85515f3e10f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xfcfaebd713f045227d51c57dd15d900116b8e7c3ab81ae26ad181931a38bc9b7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:05:56Z), 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/USA371412124.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d84b8fc12a70dda10904c4f9bedf2f399433620816897c288891e53af3d1a0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA371412125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825cb9f5e53a65db330c272c6d56d9dd5b24fd9d947dbe39b061f71cde8eea6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA371412126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868658fae7c7f1cc80f75bfd285f86d490672d75d04e47fecd60ed56ddac666f. 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/USA371412127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631d01dc7b0c4cbb110d4c02799c0a9d7d70ac37d4990f74629f35f4dd0525a0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA371412505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410b2d54ecef28897ca6e48e624d1ffefd1e1b65df692e04f59c628a6c678ec. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:39Z), 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/USA371412506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e453a29360881c7f9d416dcfe74fd9fdb757a2544cd680d341dce6a8fcac435. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:54:17Z), 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/USA371412507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76375833873f4c6e548abc7eb0d9536b24ea37d5abddb0efaf2d93f35387fe59. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USA371412508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe806bd2d60911e3bdd3d3ee1a393acf3a0b81919c0b1a4d3627cc4cc0ca117e9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USA371412510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511db75b4cc8dbfe4aa64d551c83df6988f7d67c12d5e9b7988c6cf64055bbdf. 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/QM6MZ2110055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c5073f2495b1ae5f7a64c83534c9160ed69de6f53b1443cba4a286be0ef64. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2110058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe85c2d9714b565257e55e911a5535ea0cf620a1f1290079345132a61999e7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ2110059.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b738a04450d82e3b0e1b15a6b115b81aaf3c3f6fe56d2a7c4533c8d468e370. 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/USA371412512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a8d330a04469e408964c1132358e2bbdcdf0e051dfe1e6b25b679f933563b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA371412514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6454e0c2bc4c6e84388d685673ef831cf98d4da2850ec545caa67a037950dc2. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USA371412515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99990f0706e440fd892f2f2691eae47344437493447d5698ab3a0cd8c086f623. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA371412516.