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 0x4cf696c46da37396a36ac7bb81c173dad04635eebc8e47891eec1d6fbc3bfa8c. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/407511dd-9fe9-4d6d-900f-dbcd93f9e2bb.json and https://artists.proofprofile.net/proofs/artist/407511dd-9fe9-4d6d-900f-dbcd93f9e2bb.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 0xb0ae99516b81767c9c81da59ad889b9fb7e21e2efe85da17bbae4a11010c7cc0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEH1938349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389cbb366c10f8172b9d6712690c0792dd9f03b0fa2c9eeee172c8f871115d05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEH1938358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d39c5d47bf0569ca44f976e9235487c3e59d3296c616cbb2de76e4823a9db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEH1938359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419da4536d8cf1d1007a794b965a80106dda57dc088a95c451791c853df01177. 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/TCAEH1938360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12e83ed7c7a147b2a3689732b0a127090d81eaafeadad185c214ecf1820cc0. 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/TCAEH1938363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291719951aa529d246ea3c17da85d0e6e3f5ea1fe1fd5449b27192ccb01378c1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEH1938364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d70b8e7812260f555503ab7320cb641714d0f84fd6278f712ea7263610f1a. 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/TCAEH1938365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c308ff67c347f58cc2ff1abbc2faf6ec0d050c1187bf62d93c65ad8ea3e51c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAEH1938367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bab89f62547a3e9a788785a55ff1e32f88b0e126adac89268698db9640b7ce. 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/TCAEH1938369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c3da959aec0306896a76391c1238096149a43b6bd15b5f686079690d74224e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCAEH1938374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfef2f2aa8ce97fe0711b37a650c72698d9aa6526fbe9c5a13d59f48a714664. 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/TCAEH1938377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47e1912ef0fecd27ed8e0eb3d6fcc8a304c6c48e4b124adf0aaa59ba42c2701. 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/TCAEH1938380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b156458337f749c39e604001594f8e398b7359df37305faa6d9aa90fd4b8143. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAEH1938387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe676f9e55058c94604a6cb77efa9758757ec175e8b0759de44e7f8f6f8165289. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:45Z), 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/TCAEH1938371.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978beeb94d7e1bafa487707e4b56668f84294a49251e06daf6b694e445990e38. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAEH1938376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7001948b91ece03afc4cff38f86223016f493b52ea43ef93baff6223b2bd68. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TCAEH1938378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8f91a4fb426faaa29c96f3414fe330e780803dbdebcdcb076082533c5e1ccd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEH1938381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672fa40190dc9e88357fe56d1ab5e9133801661b38f06982fe0b3043e754b9e9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAEH1938383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676b4cb17487fba2e6bb629f058f8fb498798ef9fb505eb32f4e7e025cc0437. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAEH1938384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a88658649e11713e507fd9c8dbe77de597a706a68549b754046b40a53dd60f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAEH1938385.