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 0xf367df3d0f2246c885aa651202b2e4537e0c0bfde16d9bc009034e3845761514. 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/de4d17ce-872a-41fc-9168-2ed9a388f0b4.json and https://artists.proofprofile.net/proofs/artist/de4d17ce-872a-41fc-9168-2ed9a388f0b4.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 0x796717debe20f58368924a19719969915f63050d525595ce45b47eec5a95485c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2295317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd3982c01fdcb24efdd21ab6c2b3eee77d41a51dedf4f21f0dc436a35d3758. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX38U2206878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedf98d845c54cbf3d10786b3472527667867159ad75194cfafa0a8384214e00. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU0000955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99daff0bb9e5550c64411aa74b30e78f492c6509f56b46406e38e107d9a7f946. 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/SE5BU2361388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7b8837b7e3097307a0362ac86cc66b4712021e22593bf061659024bb2245b9. 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/SE6XX2242855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e7b68f42d79d92d0e4afc293d45c76f1f5b7881ead12d8f7520b6e180872e6. 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/QZHN32206349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d091ded44ef9cffc5c09466a4aa853ed5e1075bfcfc3ea5ed84fd2b7bbf1c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUM72307436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57840d4bfc043e23614094a3a268d19b697c18f9c89dfeb72cb40bd142f581c. 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/GX8KD2342774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd8d8dc6655b7b97bc18073d942c7432019b23d453bceca792c0d0f462b2a9e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX8KD2332995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71e5167161766cf185d755074c44a70bc2ae2aac8b3fdfd06af5cea5fd1815. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2320071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90a892fc6629ff53befb745087ea824d1e810210fcfd27476feffabdbade03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62202893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162d256b3a5474559943811e02df0158a358b0f3acb7d0b0e7bcbd60f8f403b9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7411a219026dfccc87f3ab16ab613f6ebeb36dccdb070c9db083fa616a7a51. 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/QM6MZ2291048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b365c0c132e283a861aec5f556d9a319529568e91ab404be81d47050df620c8. 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/FR9W12201378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ca9541a667d754f6aea59e66362427b998db5ae715e826fc0af009dc470fab. 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/QMDA72155790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1562808830a13765b184613b2940c4021a0c672dc4a3ffe5fc011c207e1fe08d. 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/DEMA61903220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4318486a1d59238c67f2765c490d11157aa3db044ffeff6ebccb0bdecc2d0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2119382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81330bbe1d00846868ce4ac50b1e3207e48fd89ebeccac031b56fc8f58d9c9f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2088995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a2a61f425f7cb0e4e1005dafc7a179d940694e1dc706ea460fea92d4a71ec. 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/GBKQU2545281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40311f3bbf6ce0a141d71b41675cf99c056d7981191a90e14ce040be39517677. 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/QZFZ62305094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291a706a7b7e8bfba11fea2ed5a3b49d086411324ea2511cfb7bef18b5ca3501. 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/QZFZ62305834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52fc5d58ee4f305c10a73750bf78e14b7bbcd4afb3aaafd6a7f5c3c6b475ab4. 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/QZFZ42384182.