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 0x0cc60749bc3c7a42ee1fae8b445815456dd9145d0ef3462a03a8a5b7371809af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77e42cda-97e0-40d5-9118-0f287aafe4af.json and https://artists.proofprofile.net/proofs/artist/77e42cda-97e0-40d5-9118-0f287aafe4af.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 0xa1bafe843e9b679da8b1c545ca4e9cff840c312e0b3f45a40e55d56d00c93ab7. 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/GXD7V2558326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c8cf2b7af9e969d0eba383dbc1ce1314075fb821d0ff009d98b9900920e788. 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/GXD7V2573385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae79908841fc805fe656acf9ebdd103644c10712387739c8aa658a9b4ab7a88. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXD7V2505307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26de2419ec28c18b21897ca5e200a83acb33282019bfc5c17398fcf78fe9898. 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/GXD7V2572661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dbf8f94a692607c6e3f3994868746a93233921c4b6045539e2123e633401f3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXD7V2549196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e1a3c0a95eb41a5ab54532d165b9d31d49b4534fc7af24a5a7a7cbca5a9790. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7V2540285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e89f255d3497d153bc0397a9572b8295563c2232fe0767c282e384a2aab17f. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GXD7V2523216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3331d532b277d568be80265af8fd0447778fdf816a7f6794776ea29e5c84123. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7V2588721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db98d47d0489be5758ab9a29794f7b07a85c2c09d4e9dc3c1fb49f7acb6301a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXD7V2595700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc88a499b4c8500565b07275e316918d3e77ac747780cd3951cbdd9927561ca. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:59:50Z), 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/GXD7V2534860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637c817ec00c313fad49d4799c82ca31d6b3810d35b863e6299582efbfa29c3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:48:18Z), 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/GXD7V2507587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71fba0af41ae7b3552cef80b2435e5aa9241fb870556799e79f05960a560442. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXD7V2516541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e659fc6799ee5eb7ce673d6600a4b3104dcc74aaa88c329949149150c3e27c3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GXD7V2594166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcb49f0588d7577792853d7d3d5e14fefe8f25a303dc1038739e5a3de52bf65. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7V2542408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741cb04bc3ecd55972840d6288e16b1514cc4216c184d8628fe1d3e14a9466f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXD7V2569224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390e1fda9851a54613544bcad669cef693a96883f42beb75b8070c0e0193c97. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXD7V2542134.