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 0x8140928e8c3612b56acba92b5c58c436b1009134ca81e2950ccd06646a4aa76f. 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/4e9d56c4-9d7d-42b4-824b-d628bf865efe.json and https://artists.proofprofile.net/proofs/artist/4e9d56c4-9d7d-42b4-824b-d628bf865efe.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 0x684910b3283cfddab2e434e56f03ae4885ad4c7d9e0d90e2980a2b20dbdceb94. 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/TCAHQ2338907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c642f59d504146ebdbf14aefee723cafbc4543334037b56a965195f6a8a1b9. 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/TCAHQ2338908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904e7d3300e4418f2f4d5e821e2ca0d38f6ce70457438c4a223c624e0f4fbb29. 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/TCAHQ2338911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1aee9122f19fbd11a70bd856084b74a72ea3d472f3ed0afb525f5f524d965d. 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/TCAHQ2338914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026c38cde99262ef9f38fd4d5188c492da66aee3650eb6b5ada87a4053347f76. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:49:26Z), 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/TCAHZ2472875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32491bb67f57c834e37c2b7dde2d98c920a804c66203bc57eeaaa06f9791331b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHZ2472882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430943036d4ed087fb15e8eaede281958c189175238787fdaccb9c46c414dca. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHZ2472889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdba5814f1663d0e70abf7e8bd9d3ee9c24d55ef854bfe9bf79e38411d771f4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:17Z), 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/TCAHZ2472894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce83fd511fd9ee8670d7d44b6430673ce33838fffb897286a287d672690aa55. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:25Z), 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/TCAHZ2472901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616d589f998eba0c34ffbda1fb8a8493fdb750584207f5fc8aa77be325957bf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIG2435850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15f21ce0bcf476e8145d297e94913b3c211dd31a7a83fdeb41f0166f6616107. 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/TCAIH2435857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7cd93cb6326bf65ee854080870da5141bb88978f19900f0402f5097e75592f. 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/TCAIG2435863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda262a56faf8027e7c5b07fb7312c54eb53ce83850ad4df06c8bb3516f144df. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIG2435867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93b2bac785db977d6647c4b6fdcf4f20bb99271735b12c6bb64d6ae2189fd4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT65X2596933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa932638d0ccf41be051f9e60179aadeb08ac6abe5f3fa52a3e0891b68648ad88. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:55Z), 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/QT65X2596944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a8c550d4e22a9e47b7528ebccf66a294aeb2ed5b2296e3c0d0fa68540d884f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT65X2596954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb580ea56e17188ad18539ebedf455fb1b2896b472764c8be7a70b458601370d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:42:50Z), 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/QT65X2596959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d683b05daf59fc99314fb3e154c75924efa2ef17d882a64089da6c7833e40d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT65X2596965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a2cae86bdacc77d075e37ffad422779d2e89ff971b34f1b528867372f7ca2f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65X2596973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51a88ac8353d316af14fb79e6f40fe3c5730aa952593193858c641da667c617. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:44Z), 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/QT65X2596980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02652f54fc587c8475c080e9ba03e159e2e4611ea262c61fcc0b1d69894f2129. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT65X2596983.