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 0x1d4eaf4613a4cb41f0100094990fd456905df69e0dcb1de420492ab6abb65340. 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/967fc4c4-443a-42d0-b52c-c2cea7be4bd5.json and https://artists.proofprofile.net/proofs/artist/967fc4c4-443a-42d0-b52c-c2cea7be4bd5.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 0xc8827ace227737548d3c4913f30e89874cfeeb08e4c21661a8d3d0a5280ae2bb. 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/QZANL1711632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff031c8034416782959cdc088a778ca3cb187000945f0f2d2b0f3a0ab6ee50d. 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/QZANL1711626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b76f6a5bc80b95dbe434ae3a87196ab35a3e40969b5fb511ecf0ee7639bc0d8. 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/QZAPG1728831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f7cfbd33f8310fa43211abea73552b91d3208c0f52c15e8b567f4d43e4d593. 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/QZDA51850079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00947ec3013f1c04bbc583d292f7fd615f428460301b31cab70fc896be64b0ab. 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/QZES51862224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac08873645c302c554ef3c0ae53a378b78b9146221c4ab46041fa593fcddf5. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZ8LD1933674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3aa6ae0a16b5ea1d71c6209a1857387e2483e2c5f4ab64e0517db2e19aa375. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHNA1987973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c8b03b82b33e43d3acbafa49caa45763879311f33e91932578c70ad8b4850. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6Q1938803.
You've Been Quiet These Days (2020 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5931c4b9917f60860afbfa13566e4ca46dd9e89ffcbe5805dd7eec7f81a3f9ed. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZFYZ2019096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b3f2753d3175d10a9d44d99ec0f9b001f8b71640357a4d0c8663bb1c9cfd2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA72072246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ffa22eff64a249c9dffd200714af59a86f254aad4749baf60956de26ba8a1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6F2071932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccf9d7de4dd9b1f32de13cbd2c0dc3a21f7db4e1b7c4d5489eaae1f0a4b2499. 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/UKXN22197629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d022194bbf024c5d01edfc94fbc9e4cda360587ff6b1007bb45fbf052ae5e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GX3Q92110534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cb2fbcfeaa4ce6a544b2dc84b45a6525df7c51061cbcb67e496a5688df3d40. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GX53U2084796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690191f552d30e35f6dd3f392a20a483bd782aed9533f06934a13ee9e3f167b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GX3Q92334761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4fa379a9ae2cf78ba22edf22d1535077f93a99125ecb607a171330ed412e3. 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/GXF9Q2514558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48696c9a6eb4e0002246cee4b59981ce06f1efff887f724c6eec5651a34bfbc. 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/GXF9Q2560451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13759c14e99e636a4481d229caaa2e8e7e49cd5ad93fcc451fb38c5e616fdf. 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/QZAKB2134917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d8872ef1207eb565a51d7f6b1a4ec8e7eea8939326dcff39d207c0212f8e2e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAKB2134918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0c13042f1d92b67037bafec9df5bd4925ca398fdc0817ad51ccbe5e1e649f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZAKB2134919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a0e96e4965b801e7174c23e963b48c7627299f0db7e57e0895bde3c8a485b4. 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/QZAKB2134920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56604bb17eb1d5d92c2a458a46c19ec7e70e96c6c115d574749231e564fefade. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZAKB2134921.