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 0x6d49fa5052bdeb1044d79f46dd1ff47726e013e0e9e4ab3ac13979b1eb56a92a. 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/0a383a86-1e49-4fa9-9dfe-5e93eada6256.json and https://artists.proofprofile.net/proofs/artist/0a383a86-1e49-4fa9-9dfe-5e93eada6256.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 0xb60b252c5f6899c9cfc0aa4936e786be8b0ce682e889789656ad37614598121e. 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/QZPLS2549552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252075907f951c2fd1574225201f55acfe7abf27f0ee2d29831e9e4351aff12e. 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/QZRP42525047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7b1c6f14b6317348d470e81ea6d717f7fecbe4101d4efb3dc356bbba0a1985. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZRP42526755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc19dc29861a374022ef93d5fe927229744bf38f6a19e88a9eba26d7f1a5ca. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZRP42574647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55216eba36748d286e4ab6b23bf22124d37b3d9781b697b5414ba5e4b8bf4abb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP42576754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5abde0de5fe974ce845b8b72411174989c01256b21f7fb76b947da650daf3. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZRP52516898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd943e6e05581292cd08b7ec221ee119af21f6f1e3fa757790fae05062f645f3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZRP52515518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ac5e4f5c29de0f01ed0327e4818d1ae437a23faf72b8e7aa78fcb13ed9a4a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP52554274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb362c55896c910d8c520f7cfd222b7d26ff1bd64c86a8bea3ead5a563bb06866. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52556747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbefd2ced2c216f0165f8928e196933ca6b46527a8e03d6d0f63ca2a9ac2a21e. 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/QZTAS2506036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe437c5ebc3e08794cdd5572d2a4e0b2d5622522a99d8fa6b22d21b405de92968. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2503954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeaa0284428be3000dcbbdc968ff444c7f44f37f73ac54a8e02e020e6e3b9fb. 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/QZTAS2546401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01de4ef1d355f09c5347f7c99cc15263793927171659f8da46c90136a1cb8ab. 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/QZTAS2545225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1014d91c4875c21c13e06b16d2cdc1bcd488d10c15311cd2001fde32a812c734. 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/QZTAT2533197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9702f427f529460d188d2332cd92094eea4a1ca0541e0c4d080e37f0da0bf3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTAT2533229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9b29f5b5df1beb4bc7b33fdae183268d929f54430d78d076d36169138773d2. 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/QZTAT2583464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b5325c358007d1030d5052bf41a16e9a65b496a3f7820caea098fc4cd3edd5. 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/QZTAT2582204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6ffda2f28d249f597939356940336c6a836e7e4865fc705a8585d3a45b6368. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAU2525282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f45c839144f15c66234585c964a69c3b3936565b82db33c706901385dcb04c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTAU2567946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99345f1ab98033f348fce48cc707f006e5040743889b3f4628363a4acccc92a4. 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/QZTAU2567968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5434e07977955ac0e22593addc4f02bec72748abd223f9951a4b9cca9120787. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2526569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdfa901e54b5ea92108019bf45998590199acfc5a3833df584566e98f7ddfa8. 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/QZTAW2559273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab593c8f9101c11b3c8de3f144fcefa133ee6dc17d29aa307c5bd7cffebb09b. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTAW2557238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02887cdb4e3e6c053536395c4bf80eb6607d7579cb697274e17a35086365ac8e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTAX2562416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f9d10e5f3cfd9e9ca4e79d798bf776fc6eb30af215ff71395446bd0838e7d4. 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/QZTAX2560622.