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 0x83979b166ae01a772065dcb07b2dd470ae93bd5c1f8182fa835380fcec48a9a9. 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/a0ca7bf3-be05-4624-9aae-d5106baff6c0.json and https://artists.proofprofile.net/proofs/artist/a0ca7bf3-be05-4624-9aae-d5106baff6c0.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 0xd9763113f415f7c60fc28d9f2ec3ca19d8a9db809a8b87f06f846df6a71117c9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:45Z), 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/QZMEN2261802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a93be376f4d645cdb179dd5c85ba8e2b9bffbaa10e219ce4c6d36be7913f90. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:42Z), 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/QZMEN2261803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ac26339ff2d34b9ba1979f78121c5413a56f47c73759b89b8700d10251bed. 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/QZMEN2261804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ae1b4b2c6a1c148d0fc319ae688b02322e9adf13925de6476d06b78182281. 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/QZMEN2261806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b242022cb11824127f232a6323a20cdb60503d69dc5a43e42ffd6c6ffc0460b. 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/QZMEN2261813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac0fe01302cc7008f2f7b64388c31c7b105574dd9f37577b4349e6708de16a. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZMEQ2204966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1298e01b6ebaaad38e45e6574b343031a6f0071d2b0e5e69826eafc044c43559. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:57:47Z), 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/QZDA82375981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79cc26a007817006b524864ff74a2c56dbaaaab1cb5dd79943f2b4edba355c. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZDA82375982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521dc37954c995d6dff5b01c34a89b27d8ae4e0bd9d17c5d6bc00b76da5df1e3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:44Z), 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/QZDA82375984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d43cda2bdba45fae984d5efad1c0576a3d4494e65df7449a5256d3a0c1f38. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZES82305522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1e6bb099837c23fb532c567aa10ccff80d8e4d9888e623f72cd6e70e79bb9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES72395165.
Tarik Ab Mezagbki Amine Tesfaslasie (Eritrean Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76331bcd275a87891d5e6f5193bb46539f02d06b62f4ac851b6b0831c009d21. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFK2472886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d81b17434d97dcdd1ba38c06068bf3ef910189f71a6a87fa9562190907646. 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/QZWFM2443763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10b97b6504b082605cc3bbf8fbc538ad5c3f4fe5bc2f095827c3ced6dafb39a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFM2495351.