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 0xd7bea1b0b3fefa3e70321c10db1d83c0f628a5073405a26090fca42228fd61be. 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/2ac50437-6c69-4704-adb8-9e1ecf37c920.json and https://artists.proofprofile.net/proofs/artist/2ac50437-6c69-4704-adb8-9e1ecf37c920.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 0x62f89b5297fa973c73f67ed17d939491216afcee85172f6adb3111cbb18d85f9. 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/USA2P1665576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159a2a8fccd94a9dd6b2c8229c508956fa91ed9dd1e402491044c3a9ddf4b48c. 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/USA2P1665578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960217b3ddc5fc4f3cfffd04c4bd718023458c5c95a8ef8ab4bc2f5225c392ae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2103611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8ffd635a5c78aaf22d379e4a377e1560aacbe70147de465b3044f330ee802. 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/QZMEN2103612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487766e67e1f873acab5526181206716c68d8105f91c9591fc7fac1a223f0f0d. 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/QZNWW2033196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafbf6b3683c27371f904ae776fb1b07e9dde65acc141be26e3da54ecf35de0d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEN2103613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1825011361fe5311aca42475500487a427aa78a26d43dcb62f2b7268abdecd1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:56Z), 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/QZMEN2103614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd0e58350ab4d3aa1d258a8647b4e63778730ff6a78440d8e52920a38eda41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2103615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622931032b85cedbc49bb92463b500c9d57d5e26b94ddd145cb30102df95fe5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBWUL2311476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1c46cae137fefe6189d4f852d97044306b507adfd5ae7a6a3f47b3740b7dea. 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/QZZEB2475859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b972032e6f9aadbe96d408984703aeea22656afd1bcba0a6b8384d8f8254a15. 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/QZZEB2475863.