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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 0xf9022abfea2617224e8667cd8daa1573834ead202117094ee989b74b12a0df75. 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/9dd6e2e2-0994-41e0-ac67-a1ea20a04e12.json and https://artists.proofprofile.net/proofs/artist/9dd6e2e2-0994-41e0-ac67-a1ea20a04e12.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 0x04996fe80240ef78d94349b88e930637374ccdd91be7c90c5d45014f7db02cbc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBLFP1926875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b870793218a8f25995405d0c684faebc4e3712f536fbc347944ca1ecc55a8f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G1504222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9afcb6fc7362ec9a988053c98f94343786abd26410f778e3dc90a26e8496b1. 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/ES71G1504223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e6e372f0c00087b17576ad5961eba717f746472cd23d07e5465b601282f280. 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/ES71G1504230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1290c58f23601138f8e530b8cbd04a73d9f988ab5f6fc7eb5bcd35e78b013. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G1504235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934a3da78f75092f3fd740f2ea26297b20248a05c63594e1ed50a36e8b8e7e63. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBLFP1857414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0e3bd73c300784b0153976e6589b94d4fbd2cb2b91b51a0fb7cc44038826f. 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/ES71G2422157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a5a7a2f454e108445c83e38c07af35a6e744108d94a199be72be022243cc1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES71G2424558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fbfa14a421a3e82ed01243d6fa9be229dadc803de3e6ad30a97419f8bdde50. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/ES71G2411662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd39254e01cc3366ab2cecdb044443cc05aca8a26dc4b52e88aa1985a2ecfb0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES71G2424559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e1d36c0c19bcfb3683f93dad3a26c77f86c81ada9009563745d74fadff446e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ES71G2414173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436f718a37a3e676d86fff09a8c9c6f083b413a3d3903415f9364956ce85c152. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES71G2424567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34757b738a17a1be7155bcda1395f61067a512fe56407ad687285849f61fd6da. 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/QM6N22581211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf869993a02f2d7df4fd91da65e9c5f327aa4500eed26ce8ead5b6d6c927417c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6P42531096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d9b31db5e98cb9d7e14f1724b8c9c376ba31b138b648a39eb5746cdeeecf3e. 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/QM6P42544220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf0de6e6234c0e8bbb2b1c4112e9fb1d4ac499f5a548d89e650c60889908db4. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QM7282528354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7ef1fc4b64fd44c69b9872843854999ca43f1595b9a2b4e41f2204b5d9475a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PEBQ91719602.