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 0x6915fe7f23382f3f48613864cd178621ac6d11d8df74cfeb0e4e14878f845423. 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/406ca418-3646-4758-8b04-7e6ab5e607fa.json and https://artists.proofprofile.net/proofs/artist/406ca418-3646-4758-8b04-7e6ab5e607fa.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 0x92428e4bae8873af6e76d4b30c609d6488c405bb97032e8737ce5dce5a2cf4af. 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/USWD10630645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22692df0bfb31ec4b9b1ec2f5fd7f414e68d536de26b39a0fb0975f49966cd98. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21505730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026a71e7d79d5c20463b01f4fb02f7b5b58900ba1e220e790760a757d06e2353. 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/QMAAK1503734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d388e9c67e5c7f9178a9f3dcf09ec662474aee0b3b062c743a872d92e7810. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGH1618420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb416f3f354f920445fd9ac2bedffc183d066619df42e3ff3670619192a919cae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDY41628883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e4dab02c80e54260d4c9d9c0178ef8f7584499876d15b9f293e7b4cc82f7b9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM21607770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd5ee98a9eb487b79881f64a3b450232a59dd8f3310323ca57a502d367da06. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USHM21659941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb949bdb358c587139716dd9882aeb11dffecf14ab7a3181edfd236012a4424. 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/USCGJ2073872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedff843d733024389f00b22377d7e2bf422edcc4a8d5feb7207cef9a9682f3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZK6H2082290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d818b545e5f27043043c3feefd58c65eac08a3a76152ba5b1f81166a99036af. 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/QZTAW2220479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d860c42a895f9166bf0487f29a00e24c8aa28b3630d043de8349e032094d9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZQAY2381688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f7abe88c7bfbeb03820546bc18172ae7762ac0461738d0c94be01987fc888. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZQAY2383785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f102630f1f2f53c36badc95b061b64139ec43de7f50d1790aed5764fb5aa384. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZS7J2361139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b2a6b3b8d659998d99884acf94b6a2967ba126572c5286fc0574569f95cad. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZS7J2364979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f5667ce050bb4ac24e915956e1d25f8a96349b7bcd854b6bf367c6eff1ff77. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS7J2444982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e86562799b04ba18585f9990d4269c9cfd48d040264514a5d9c3f35ffb018ee. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZS7J2454910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5ea46a855d2e22fc764da054c7e6ee1746cf7b05f56611b9d9dcc0b063326. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZS7J2405850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5eadc1ddd1003bf67a2936fc48fe0ac22e79d576764f4f00e962d2d4483db. 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/QZS7J2440839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798dbf47764433935d7a8cf44e2ea1ef6fa769b8d9ba8462017e2a727dc5829. 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/QZQAY2530991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3d0fc8d10e920aa07e87b61a37984efb994bc3d21344c97a7ad323103d49f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZQAY2500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bf287ab1f0d89b4d8db512f94815c54795cbad67e784c8a9fc6f76f79733ab. 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/QZQAY2506443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798dbf47764433935d7a8cf44e2ea1ef6fa769b8d9ba8462017e2a727dc5829. 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/QZQAY2530991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf5f02d46af8b04067445b627a8f66e2e5d7c40e68ec4e5887e6672de187b7b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZQAY2521067.