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 0x1d393174b707c8e7bcf25e9acaf52634f5e23c7564ddfe91e5ceeca23907bca3. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/149f3ba4-422b-4823-8e64-728b2a3bc18d.json and https://artists.proofprofile.net/proofs/artist/149f3ba4-422b-4823-8e64-728b2a3bc18d.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 0x7c89affb752892c637a38b052af63de8e628716c79b8ceafb39b909cb5c348ab. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM7282502656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500d27cbbbf364426c8ac1e153ad454ff78abdb45c3f56b095f353c586d144a. 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/QM7282502659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf569928cdb7f2e69d74a840b610e9de56793b27904804e49589fb19d042ba931. 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/QM7282502661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bd78582a7307390c17f646e16e27c7c73fca28a8ce3fbc0ddab3a28465174e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM7282502664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74833b35fe4d8b0b99e7b0f464a02e4814f4b4c68d961646260fd0c75c44aba9. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QM7282502665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62cce4c0a603af35affdd0513b217cf539e196f5253b3ccd227142bb460bd89. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM7282502667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbb8df3ec424fdb99fce5908407cc92ec38e8c4ae4a5ae784fdb9511af89203. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM7282502668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f491c41029c284c96e1bca60ebe388ad21223631875616242f09400827338. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM7282502657.
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 0x436f47cde05cdda46cd282971c9c91cbe254b863c5355ccf2c2b66c595d4a7f5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM7282502658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946b4f4062e7b430ae85974cfd0a6277a3e4d5b40b538d73126c988d4801e18. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM7282502660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c971d7a2d32ed345cd470c69b4f9b690d8c9aa9cb07f6c826aa54db0cc9096. 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/QM7282502662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216e6af419973b443d0c1a29f9fe99c2a8502ee5ee271d5f053fbb07954c30b1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM7282502663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645f9104c34713d070ac5b54b2fc4253dfb580ff77f399ce025cb2709007b4ce. 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/QM7282502666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd78eaae2c441b0d8e0e6edaf2e35d13530ca9128d6510d89c11c5a075722ed. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM7282502669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f954f16bf1dc732aa52c15d8e9c5effa64343b2b7d61460d252b24fd1ef5926. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM7282502670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0160b63ec993a671e8cdb2d215a1173b66fee0ebd2553725bf40ade6b584ccf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21259315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776911bf2d683700af7a69cb9f6fc04fe61a0474b56531cc7fa09cf00008b7e5. 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/USHM21259316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31635563c58247c02cdc48b7f3faa17a643e4e1843600b9c41d4c38af68e7e46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21259319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824c84456fea8ad2627a44d7d4e3e153cd818332502b94d160b664523bc3a199. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21259321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8cf53faf3b904e48a11a829bfb8d6a41f0a22b992217fa14fa35042af2421. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHM21259317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6baa06dec69c910a897b5fc5eab3c6468b019da45a4647d7636f592f06db660. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM21259318.