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 0x1145e1432cfd5be9220690a74245025fd175310e0b2e368ead52b2849f134881. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/856931fe-2955-48c7-9717-bc973f9bbd29.json and https://artists.proofprofile.net/proofs/artist/856931fe-2955-48c7-9717-bc973f9bbd29.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 0xebaf71f891ac1047369b4957f8b9140f09eaf067281b107a81ac90a2ff662ad0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2380006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd82418105ffe230bb721364c4cf5d45ee61b09096764a91ae91e15f6361925. 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/QZV7A2380007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679c70689ddf72f0cf5857428d010afcba2b085f8064866257d33a1b53697dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2380008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867702487e9a451b69d36adeb16c2610ec0c93b73fc6ad44c13766182a2eb24. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67c4ea72664e9cfdfb960973d08a982de6cb85a9eb53c1443c9e31267c2918d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2380010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeea9adc25a5ff3f4b965851d4c35e5ffa562932afa2e0767d5339d0cdc32bf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZV7A2380009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb6d730fea45e793d867662e57ecbe4327458f2568d52fc2e8e8b3fc3c451d3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZV7A2200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e02a3d32e02d7805cff58ff63e639bc8607e9a48ceaf694888ffc27870133d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZV7A2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544670ad02503f8a2b219db05ee37e24c60c87c2ab05d4cafd8b83bea06fea11. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZV7A2380002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19704bf7e065586f69fc227bb8a21970423605280e532c5a59cc44bca6ad2a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2380040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01a318ecabb693138ee278ad1b3f4105788bf7a9d567e9980d0cfeb19549f5a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZV7A2380030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca738217a82c3b0a6d1085f0901edffc8342c8457acfe6a51f9949096a142a85. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZV7A2380004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f8abd9f1af82debde58c63502f67cb0e7646adb184191e6b9e9a3e473c43d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2380000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f65654f51e34b93b26950097fdba476fb5bec4f36262b20ec586ac442a32df. 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/QZV7A2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ec6965a37bfeeb430bb21717781f57f89c9d22b33fef54a7cebdf300a1fd0e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV7A2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6992d4bbf2b4b3274cbc02c3668ecb961ab50b0162d5d2c4204df40264699efd. 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/QZV7A2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cacbafca517e7df390ac965f5ac7054a722f645359a6e0ea385db24a46f9a7. 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/QZV7A2200014.