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 0x1ce958ed012b522680e71e88a54889fd4dec5ae89d0c7ea1abfbfecce476f3da. 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/cd7f5ee1-c3ab-45e8-9a0d-a928aba328d8.json and https://artists.proofprofile.net/proofs/artist/cd7f5ee1-c3ab-45e8-9a0d-a928aba328d8.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 0x87aa3dd1757b9b350396551fc48f4b37c7fc87b7de32204714c91067760e24f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652321817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9520afe6e1139713ac4fa00800ff3ea744f66d751135763d6079113a326b7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2369857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434609eb1f549df6dd22158c9da955837205e49afed3b1468bd2bbde60ac7ed4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8LD2331050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deb40b63bf30b70e8051c70b65061f31eddabb584bf1ec7dff068720f74badc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHL2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8f100ec41ac4a62f2cdbfe9f8daffb8d4612eacf0f06b84a523ac33572730. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZMHK2391412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8884d450873f0d0858d1cf6c9e2a420ac84b15159cff8067207173384f74fe5b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:13:52Z), 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/GX8LD2248574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632784aa23b8a2f6d3e75cb9c8524af70f704b3406889f3893486bc1aa15f364. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LD2234487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29b4a7cacaa7f827a0dc7bf655a3530b74e08e70d128090ed8b89548f0a70a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LD2205309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52e07ec9dd00e452317d3896a16ba596fc4d07aeb4d122d6577bf9884313c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8KD2265202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236ad5b26f99acff86cae05bf17bbcf43f5f92b4bd49254d5bbf0d1d1e1b9e53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAZ2238557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1058b9e76b705f477a76e0fdf6d270e60c369a29dac1009b5178c5e4f5f72ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS662464095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6ab49854218b543dddb6f042a75d67233f6456c4638212986dcf968aca5e0e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2433017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad11b4bc40ea4aa842be029e31c6ba8e23e3087c12853ff772dbbcbb3a3bbd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLZJ2383601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb55af747e85a548cf6acebf0eef018b04475dcc01d787ac7fa0c581aa2a9756. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2317550.