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 0x20187b555b824b150d93d6b1dbbd1466ee5dc55ae0b88bd4b74453d418931ca4. 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/b0401730-57d6-4517-a15c-d367c1db5b26.json and https://artists.proofprofile.net/proofs/artist/b0401730-57d6-4517-a15c-d367c1db5b26.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 0x87a5357a63df94234cb4ca065253ae9f3de2f51a8171b1c43feab2f3f619214a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:59Z), 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/ES7431500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4932760464e2b14149c6deed4f49bfc6fea5882ecbe148e1a02f7f8a0bdbba1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLPF0095670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4c59eae2444e080571c7dd1a72b089f3de7a89253b7b212651fe805497cf2f. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBLPF0104163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8715d5745796250d7381c67cb6b17c076f7c6de215c8fcdbea68ac43fa034e96. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLPF0104166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbce799ba51ffa10472b99b8b6d8e6c62e3c103813ae78eabf7cb9d8cb4eed2. 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/GBLPF0104167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a37228b3662069cf55dfe1f242b4dd5fa4f93f0e63dbf0e226e60c96c539904. 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/GBLPF0104164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2c7af6cbc63070342004b20626c58e156bd659c6a2d7094c9bfc1cc800f97. 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/GBLPF0106671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e284143c4c84fa2cd4e7abb8fdbe31858e256e8a525d9d59fdd9a6e52aa301. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLPF0113990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4daac4b40ee874a2c5df9967740418d66d75dd2077c568e349992ad4277b5. 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/GBLPF0130549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3e8fc7cd31be90cc07ba468b952aeb53b5a26e6c2ee71d403165090a0bbca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFME2515331.