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 0xd733430e758a2698065100667650e671fe90a22c34836e53d9d140a84b95148c. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7176c615-cdd7-4fbb-8995-a9152ec5fb94.json and https://artists.proofprofile.net/proofs/artist/7176c615-cdd7-4fbb-8995-a9152ec5fb94.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 0xc1170ad78f80d301783b9d4720447f54e8f1a73131a82f9c8d8c5bbfa01a2abb. 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/QZMEM2294584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc9e80d561b7b9af5f17f6e1fe8a7b4854e7f232724ab821b1b0c537bd1bd7e. 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/QZTBB2383619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e281254e21038cf67528693efb9e92efae6cb8bca42797db3da2a79c6fe109. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:17:51Z), 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/QZTBF2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf060075f4ce981b6b817fc93d4fb3bac4d279c4503063121158b029f00f65c3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTBF2301082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146db8454730f0b5dba86ed2e8785cc65c5f55ec49304292b75c2df10da3eb2f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZTBF2301083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3dbabf15611a7ae6a3ae43a0a490bc2429646207c7d822adde7a13ac7edfae. 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/QZTBF2301085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a99c6d640e6b8a2a9f455cfddf635dd1c4c540aa801f87d2948fc150ab57ae0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBF2301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4545a6dbde77c9bda2ef8308e011b353c4d05f5f91f6bc71ee981051815ae2d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFF2367353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f08a2c07a9ca32b515d276d63a1615345f3842e3867cce1961227d5537e48d4. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFZ22403080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeed58dea060a0474c88b3900907a0028e93db3318316c93b601f01f94b13b27. 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/QZFZ22403081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340dc8a88ae1236acb9860943ce6006bb22843ac32e3c9eb5657cd00006b9f4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZFZ22403082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67528c4bd438600985dcbc3d8b898890e56b7a17a53c0e4166239a484e377730. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ22403083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4889a95583dd4c8ddf3afad4566babe39e6bd81a4916f839759447dd2d56db. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA72514880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef28f0e00d5a6d7e810713eb2b9d8e473753406a4b329874d209b9c4e36fa5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX202531769.