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 0xf27d121e242dbe5d1ae478caf19e157a37177c85cda2211255151f5b87472820. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/477857d3-87ef-42c5-88b2-b9b0040985ec.json and https://artists.proofprofile.net/proofs/artist/477857d3-87ef-42c5-88b2-b9b0040985ec.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 0x90e34fea9f8bc90f795890d8aa6116673e5e29c1fe8078fd19759226de4b5718. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:42Z), 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/QZHN92433330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb5b8b1a44d5714df5599d5206cd5d2f297c9e42bfcc689244ea8ca69e3a889. 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/QZES52403457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687714061e0fade8237884d1d2f5a4ac6fa6836229ab43703e9eb5846fe989fd. 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/QZTB92206684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f57e28569c14971c556560bd5f4f28183da2e690000a8f505e9cbd4987b1c. 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/QZWFX2470487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76889f2e151a455799f44d33ae8b376f14f423fe3a5812bfeb5eeea20a8390bc. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:55:03Z), 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/QZWFL2378429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c72d7761cfa32525dee197cc2294ac85ddee7e1da889c41c1776b5f9d3a3e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:29Z), 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/QZNWS2384979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd44eb276761c39e29148643353a7e4acd2ff46a2df961a446cdf900ecb903. 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/QZMEM2556904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b40944f950b56d4f1042ea811cc04357d7167b74c5948e6c172468085d3d08. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEM2556905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c519be5037577de6c040409e78f948975bd80d18a15ca2b591e586bdabc7813. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:52Z), 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/QZMEM2556928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74915b5d36e935c8480c6f4f0b682a61d21b21c55b940099002f31e3a4be06c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:54:33Z), 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/QZMEM2556998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a861ebcb59d4db64a952ee10d9195b3fba4d5314abc4cb871d4c1837eadd91d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:00Z), 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/QZMEM2556921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a26ce9adac1b95c049d12ef654308a18e54b7cda25a08ae5719d91c4327a60. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:13Z), 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/QZMEM2556923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694dbabf7d2539ec510362d6b73c4fa6a11e71333b9acdb08884cead3ec5771. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:35Z), 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/QZMEM2556924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb754e7d2225d809cfcfe32983c978afc1adfe6c76f0801edac373e0a4c1a2aad. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:40:52Z), 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/QZMEM2558616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0633f8280856f61941b4176437cf4a04ccdb77f7ce82a38b72090757c127a42. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:53:47Z), 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/QZMEM2556918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3839a46141e4fe35ad2895d976c52baf406e76c76368f10056a4143471422997. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:56Z), 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/QZMEM2552409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd44eb276761c39e29148643353a7e4acd2ff46a2df961a446cdf900ecb903. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEM2556904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b40944f950b56d4f1042ea811cc04357d7167b74c5948e6c172468085d3d08. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:34Z), 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/QZMEM2556905.