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 0xf572f45f22a8e60882d46580a8bd0a7206427c258d6eea193540c66ec79cc645. 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/43df5214-4529-464d-b5d5-1f8713f61423.json and https://artists.proofprofile.net/proofs/artist/43df5214-4529-464d-b5d5-1f8713f61423.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 0xbfcf0a45b77075164534a567bedc819537520d0b90d181cbb0c4009ce1775d6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBRKQ2409677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe1bc513b616212d02140305db64d93b6900fc3bbe937bc63b1abb2f5df5e0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBRKQ2409681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b4d08edf420cb45c67424bbe90e8a2721899333bbca2018ce74bb4e9ee4ec9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBRKQ2404240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec8561517e98b9a627bb7ab99f933858dca14dbb30fd6eb864292b7dfed606c. 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/GBRKQ2404247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57a7e5015f2a102c563a3dd1c4710e12d10f227cee3f377721d9f25730536d. 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/GBRKQ2404264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e005ff031b7f6760bba9097d38b0ab6c69c94b5c568fc07c257a0cec9737cd1. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBRKQ2404174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a2fd7ce7258197c294429a6a36a9742ae79ae096c56fd203aa3a54472cd5a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBRKQ2404181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1db2f5ea7e08b497b8fead38d7f7fb2ef294b8db658b81ddd24b6e055c45e. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/GBRKQ2404184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4089521e9d326acfb4438886b56d1acdb051db40f65c24fdcc809259eaf251. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:34Z), 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/GBRKQ2404189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e886e69cf14ba845388692de014446ae27902ebdcad614263f80ed525d9a6d. 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/GBRKQ2404192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1339212563be397352f55d78e203d22c4d4c69edefd7bffd352336b799bf0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBRKQ2409795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef461f13fb3aa15d1da02ffd9c161aa4f5b45507e5115a97c28602f895bac2c2. 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/GBRKQ2409798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1864e88da5d19993a48f5d38e10dedcced372778491612bb658dfb12cb0d51e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:18Z), 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/QZZ8B2467119.