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 0xe556106dee39aa8865ff2df395b77024638b6330b20aa6e4b45c824de745c63e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f427e8cd-499d-4ade-aba1-974f538a5c8a.json and https://artists.proofprofile.net/proofs/artist/f427e8cd-499d-4ade-aba1-974f538a5c8a.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 0x8092d694bfd6167513a84ee9be3457849930a5f2869159a66865afaa49d30c92. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB72305750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053cc66bd3df6e142cb546d44db6276c20ba05cba53f3e93ecf4a063bc9bb4fb. 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/QZMEN2414690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4c4ff5506047561aea309a65bed267c021eb96f52ce593147dea6a703ec05. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTAW2453043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1538f079f4e3a2a0e801bcecc95fbe1c3f3f2f368ae7d3b356c0491d5cc3de. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB92454486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaca8ee4af8d29c6f9fa94859838d92e77c8edaddca1ca92fc16823c6eae2b77. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:21Z), 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/QZTBC2471140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb255f651a4ac7c5a76fd686a8a4b159d6f19bfd5a09c96746a9e1719d9e9d9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:04Z), 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/QZZ7S2418528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b70454da00c8972173dbc8e5bae7cb6f690b1745d8a450bca05a693844894. 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/QZZ7S2418530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf50ce14757fd304849719d7847c576bc4577350db5eb40ac9455e294e5ad4d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ7X2450230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd638cb88cc2b271fe1c17d92e3dc480aceb8bc26249fa88843c9a33a151c9. 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/DEYX82236318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9381a7db2a37a0d7958b41dec11496bbbb794ae12779580fd6d934eda9774dcd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:16Z), 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/QZES82511401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a164cb33f986c436e527dbd893728956f92365ecd1881675bb16a0ba1b9d8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6H2544423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec5f2f0334e5857b94e31c17a398125d2b3fb02c825621049ef3356f0236465. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMEP2537962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5a482cc0e2b137e69157cdea8650117a7b4bb698ea6c7ee83151638b44fff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2577615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7c5374968507ef994265e7ecc03e30418ef0d0317cc6c22ff3431ff1d9e7f8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWY2590554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e4cec98bf899512492bc9bf63d06ba6672404bfdadd2c6564a619f1ad2e720. 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/QZZ7L2597494.