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 0xb49c0f8db937308dad958be3a36b99b25d64831cf3667a6544b3437de0ad7d52. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71975feb-fece-40f6-b69d-1df8bd9d5bf9.json and https://artists.proofprofile.net/proofs/artist/71975feb-fece-40f6-b69d-1df8bd9d5bf9.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 0x201a20cf51104e6c38cbb1cc2f0cd31583cf2738e3e218e90d35b87ca54d78b4. 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/UKXN22578847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38684d545223b46a17e1f00b635b79d7b99b2b2827436d60edaf19ada2fb1743. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UKXN22578848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b0dec476e17b92db4da8a14db6b41ebc22d2ffbedac9be172acc35f574330b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX3Q92520417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5fbab7adefb7af4392914e1b78b5b5f4e3097f1725c291077e815e619677a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX3Q92520418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63cb0dfd3696782c514f8eb881646fc5185f0522d989893db0163125e05f1c0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX3Q92520419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc81e4acad5a14f404026ec6ba338cf55682fc4a95fb5a19d1a46f4e044d905. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92533363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ae1751d3b20d7ccd86048d58215f9c71139f6ac28cc18177c0d58377d5f436. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX3Q92533364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2f699567b825883b346a1baa9cb7aec5b7b026541afffdaff256589e3188e. 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/GX3Q92533365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f50f189d54e2dccd8b6e0b691a756d28024a9ca6a8d6233b97bab4ceddf69. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX3Q92533366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e9f8d7a34605442b41997e00f551f7f0c16bc3870324ca3cc3fe2220ebdc94. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GBMA22500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eceea04734bcedd8d13ab5cc083affc297e16cff6973422697aa317b19462e6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBMA22557440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c30dd7baa069d311866b169241f4effd86ed34daec7f4f153399c42463eec8. 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/GBMA22560535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc046fa16b0f6993f1e880fea72ae329841b2802182af76b6c0f5c1f0ff92e6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBMA22562972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f73098551d41256e2cbf863d058595f27011e3349118624a54340f462780b05. 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/GBMA22568589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139dd48da4529b4187d3a0b80cf2e2c0007041a80162f0fb2082801b9f25718d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBMA22572726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620fbdaf9edca8da8af8e007e1c72952709863bcb87f0cde4324363f414c6a34. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMA22580523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49aee897f5e58cc5a10162d45c084c30b0b9847d639244a3d7e756bf68ead5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GBMA22585773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c27ed80c035ac5c87c0b83b046127b15fa94aaa5a4ce00a97f66aec973b1d2. 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/GBMA22586566.