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 0xaf42393cf2274c40d2bd43628c7b7e0cd6c13b64113239394f0e42a2874b593e. 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/0530304e-1c54-42fd-af77-21b8207aafbf.json and https://artists.proofprofile.net/proofs/artist/0530304e-1c54-42fd-af77-21b8207aafbf.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 0x579e5b3ffe81e97e07ead4d73a9885c0968dfb5ba536864a471222c599465c4b. 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/QZHN82124641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c3739849316735bf5c34a4545c30c5682b7ab9620bb68bded9221819f2be30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN82124642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99779de6a149a09e1d2f26dc2af8264fc33a1e0b658787a177b0fdd95192bdef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN82124644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3199564387641c90d74aeadcb4f0c50d95ae9128f2c03458575fba5781eea490. 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/QZK6L2140419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18436c6a3512674f053f3c2bfa17c482124e1cf7a34970a536c642f40a553cd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6L2140420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7419edb7f54955bbe398515d0221cbbaa9fe2f5eb00101982bd57afd06b87684. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNWT2141323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3115dc171ba189b88a04cde544b957d2853478480cd41219ee632f2be730789. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:11Z), 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/QZNWT2141324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a0531b28c38569bee2540eb3929026609af049c7a69988fbf13807844209af. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:34Z), 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/QZNWU2382814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b6579ad66df2ed7dce0b32deaf0044952acb587f5bb2e049b588bb63b6d18. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZNWU2382819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c87fd77d2d59ca11782e81fcf907dec0c2d561a7c0150b0d3302d8ceb946d6. 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/QZNWU2382822.