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 0xf88687d40bb0cd9f6c5ec3d4ade95da854403a5258248fc141d518bc63307ca2. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ef39a9d-9b91-4490-9ed1-b6cdc5b22754.json and https://artists.proofprofile.net/proofs/artist/1ef39a9d-9b91-4490-9ed1-b6cdc5b22754.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 0xbc9f6639761882fe0354294e61d46d1625cef15112c4b424020285f64414482a. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTAZ2594088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1adb534ffc603bb6ea850f0d7c7b19d4e3e5ff7b18ead52a252534faea54c31. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:04:41Z), 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/QZTB22532043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ca9ae2960c83cf8c80e39d05956e4458482aa0a0242113e199b55e4dfd3b22. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:55:26Z), 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/QZTB42568292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f692d0a23394d17d606f0bab231b777a4e7cb4de62567f95f304b7d96733a1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB42567023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedeb467799b55639772820a992829e628648c5c3bbbd5d7b6519ccc019213b7. 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/QZTB52512141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9841e7da8b1861f8ed0a78ec8395b896ff16bd79b83d83e85fe30aaed0ce42. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTB52505524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3185ee816feed8f51a6344608aeec14db87cd6aad1517e00a3c3928e3aa46e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB52514391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7cb07594dcd128420296a82aa59c914e038b0eaaad035c6c4eb378613b069e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:33Z), 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/QZTB52514389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36231902d594209af3cd9678325f1ab855edad025356db6c18eaf9e27fb5d2b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB52552715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30831ddd4ce5d66507fa3db9108a93b736e751142195497e02f9e574fad57ae1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB52528740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b81f1d0dff1b67d9f9383c3f7a3c8fa52afa45b0ab0076d5eff8eabf7aba5. 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/QZTB52530430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d5de2a9e42428d19dd7e5ee26d5d33cceffb2905494521c293367ed273ec0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB52552706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cc422e27bd82f8c3d2b62ef1d1bd2627133ddbac3f246ab2eb6314bbc4637. 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/QZTB52552716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ac624e3b8bf1f98117ff32847c320e540e15215811f635dbd470f2be775c4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:23Z), 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/QZTB52585789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e92afc2071aa42861f09d9fd4ed41acbfd1790453e133bf9825283faafa75f4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB52574274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7d1f10c90ed925af4dd4bd9e1550f3a5a345d2ab57d9b5c71e4bb5d2d4d5e7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:35Z), 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/QZTB92573637.