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 0x58c7c3cfa08285bf42f799e61a4378613629ba1f5ed6780b59a27ab685f36196. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91898c40-3291-40b6-8695-2df078e5a7ea.json and https://artists.proofprofile.net/proofs/artist/91898c40-3291-40b6-8695-2df078e5a7ea.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 0x24b49d4bd1f503450162ec4e8d43f92dfddf6827a60878d03756e82ec20831e3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ESA011775001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b776fc51c3d0716c1fd7b96f4c3cfeb7555b545c852beea249e4d58afad806. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ESA011775015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c488c1d095721012aa58c163486f135ecedf223c5557311cf80af9a3dde3774. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ESA011775016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b039b2b6dfc6895507a41ccbd2e468dd5ecb3a5b198c5b09e90bcfe10335d7. 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/ESA011775032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c73de906e805881d4e4a43a9dc24284a9508b56c59bebeb1f58f2eceb464f8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZNJX2199847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a4923c22d8a0d86c08092bd97809901bba1f93e182e0a17f85d38e4e1a531a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJX2199850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cd29501f381566a273ed675b0f4116febd930f4af4d06876c05a1a09292cf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJX2199851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90abd92d5a88371fe1b02494f3f1d6cda1e02a8aa234214047cd9d5f9ab5540f. 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/QZNJX2199853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d5e576b25b8887ee95f287d5c81f5c36be8310af1bbdc963c9476c97e0a82c. 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/QZNJV2196856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7382b9b9cbf804e787f13a828970abdef0079b8404d462c73021bc21e5152afa. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:11Z), 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/QZNJV2196855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd53b5b0f343f7b918dbc2e650770c3ef859467534d39789b843bdd6859e1da. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:27:44Z), 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/QZNJV2196857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9972432946e9fe8c15288d5d1373c0b94e7f418441c117b5a41753ae813ab9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJV2196860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ddf4bc8812ccd8deaedbaad76a6cc9ef4ee502e3bb847d66ec189f15a08a00. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJV2196862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8329ad6671b0dccd52351d929db7c6798588d28b78b68c5483be9f0092dfcc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHZ62140224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57740f5ff063eb56841819c47eb69378db9c77882cf23d5c39455e0d00eff7b. 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/QZHZ62140225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f5d32f399bca8a4b6c8e1bf24e663a148fb9d0dcb6e451eacce15e5205f4ce. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:26Z), 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/QMDA72181918.