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 0x6707572061dbbd8fec686332badbaed4b08e5413be9da1d1b40ebd0668a2aade. 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/31699b8a-fae6-4d79-a805-8546bf65ed59.json and https://artists.proofprofile.net/proofs/artist/31699b8a-fae6-4d79-a805-8546bf65ed59.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 0x8202e3233f9f645191b88179caaca95b20e280a5d89c51c0447c58da3219cfc6. 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/QZGLM2536552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ceb0e7475c2c665f6c69ea16f29992d317c7dff81938707c0b75cac65799df. 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/QZGLM2536595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586021c50fea1735286916e44e0e19f8750977863e80564443d19171ebf1170a. 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/QZGLM2536596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc6ab8a84cb9c04fe3cb01ce598cbd3853c4a0ddd7bafd01a51f41c834fa57. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2536597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399fbad5e44a9c7e2daf4089792a560492e05d828a789003f8ec0283e0ac3637. 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/QZGLM2538880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4862215af4ee89f9887eda41c4c819e6033d2bbbde0d4ce307153acbfac69b6. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZGLM2538951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd798df9a71d9f0af74e6b03c68b7ec231542c1f209949907b09f36fb9242fda0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2535944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39836519c1aa5162280f20c9d47da241cc8e70a2f426d1f24abb8f2f0f88c3. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZGLM2538945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae4146bd6130185836137617371cb6541bd5beab819cf33f5073f071f09fada. 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/QZGLM2536662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f4031fdaba77aac27d31d23d8e90c30885d4772a1630a1fbe0834813bf13bc. 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/QZGLM2536612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70320b7ac423d4c2c6a4748e6e22368adc255bbba821bddc228bb435084ae956. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLM2536608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b291ef6315dc988b3e491391568279848f58ff45669095481173f3cc95e74. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2538761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7968a8357dbd6a521a6f7392bf2eea997409ea09abf09ced786cd2ae9d1c206d. 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/QZGLM2538781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388483d779b895720ece884ec1d80088b7a52b8a8ca1ca7663741482ceeb4904. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZGLM2538784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622b1f7e3b7950f3ad2d6a5f5e41068a3b06b072abaa9bec1d3870f0fd9d0b5a. 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/QZGLM2538809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79153c968647d4ab6e46f76df57f5a1ddef6c84b6aa51df2a87a5970af8e7f20. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLM2538802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af09375465ba2aac873e5b38c7c86e05d7dcbd28ba2c272aae96bd2b1b6bfd2. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZGLM2537463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7112840d434a3b18c0697d40e7a0abee69ed83ac83c71cdd514a764140ec8189. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZGLM2537408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce6105d9fbc90a866d6ab4b9d1ab12428784fe8bba2b3441cbf8310813dac3a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZGLM2537297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6617c661a031374d85817f5cca258cd86f8542f93a1f2462603a53b1504803a. 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/QZGLM2537254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30535920f0c3103207c78d93ebfe12cbdd496b7cb2c192008e67af2dce9c575e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2537250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d69368cb5e5986dc3e69a6932faae2b012c3b2bfd0191ed2ca93f0acc001e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLM2540267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba648e4e35f59fde99575e33bc2571bacd787510ab619df83df6ac35c9d9aea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2540313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f98fe4b0df0f99c16b997f4dfdcc1e81af32e0482f56df24f774b566e0fb073. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLM2540314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc4e7f1ddb3905719cf4a0dca9b01baa544fdfc9dbc6ca5219e4a84ea579357. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2540323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a951f08ab68d664209607f9eeeb41cb95d606f41325128940e7b05965acf8. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLM2540326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592ffd9ccde6c7aa775150f8cf391f99a7fdcee381184366e5a887911d22cc8c. 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/QZGLM2540951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c01c6896e1c7d4abc0ca6190a5b041048319183091eb0b2ad7d80a9524c8609. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZGLM2540358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d220e04a9738ef6ca209ba22b981a6db177cd8bfabfc51fe492138be39aa651. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZGLM2540360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937f7f1210a941aff80c6eb58c52d88ec4adb23e10e36fd88ca8af425711bd4. 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/QZGLM2538675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e444f64443c06776b8d7adefed0381e9fa5a04cb4fbed0909bda79f277871e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2538678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9b20eb08de1028978e31c71f9eafa91e7882e63c6b4466e63f499ebde10435. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2538726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e3e6c5a736ad24a9395c61e9bb2391089558c8692725171860ee818381bc7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZGLM2540263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ddc56557a6a38644cec7934770dc09e34c24fe83051918a4b2e21c0e30a1c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZGLM2540311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eea8ae6ff4645ff2b480469a385a5285554431c40d614ba1099c2684b76c5a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZGLM2540357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a2b4c8bfe4da64ef8d8c46d33804fda14056e9c886ec960386d6e6af52df44. 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/QZGLM2540909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6e5a81a5c7ebe0911f0716dba78eae05e2e1beb421a0f12d9fb6807f516c4. 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/QZGLM2540422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477784542d7a711bec23feda02a7b7ed91ecd6c1721cdad3504d277ecde76d7. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZGLM2540378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77131376c82981d80f33a22b5c936488c86e468ff3f44c65f4407b07cab7488e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2541004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47cb2764d8355a91d56b177e060514070d2dd3173bde53123b68f48eb92e1a. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZGLM2541349.