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 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 0x8222ba89696d06555ee99e786886c89f8e50fb71373286358982dfa02714c093. 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/c52dcc0b-8c7d-4804-9c64-50085faeaec8.json and https://artists.proofprofile.net/proofs/artist/c52dcc0b-8c7d-4804-9c64-50085faeaec8.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 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 0x87fe0858b04f64a6ae8a9c82a4ac693e0243603d8795bcf0b5865b2e05522d73. 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/IDA172121011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62334357331dfe32eb64a5433c6936c09f40c55a4ad530e4fce92b74cceefe08. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/IDA172121013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a680633b12c6676ab34fad03a692e982d77ebbc479bf11e10786c567fce26eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA172121015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d21b3af780b855641da619ec640eb2ec0478adb7124f93683abeb189d0b50f9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IDA172121017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8fc9b9607a844808cef61378b9736422b7108218dd52a62330c9f1a9632ec1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IDA172121020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad5fab9f01a5c557132d048b39599796646c8fda08174bc2f99542f5ccd850a. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/IDA172121030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7a0cf41b2c18e1822c10790d0b55af5cea00c34a9f6b8fbf1cd11558a335c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IDA172121032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef72dad8a2f98032ab0eb705ccd6b1d3bc2b6bdaa26cfd8debfd0bd47ad195. 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/IDA172121035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08890de16d0fedb6166b606c69288a88571f7f804a6eea1119cf3ec4d00b741. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/IDA172121036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b22fc89be45394c1591423d5c4fe0e563a4eaba9982c4081a1d3bca3fed471. 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/IDA172121037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673b22526f4f87b56bf374b6bd403394292135e82daf4ba922ed7a916695f59. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/IDA172121039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eae4d3033fa5be5c81b71510a507cce80155b594ea808f022ca793026635d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/IDA172130075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7ab0908fe01f5da4dd08e113e241d371bb4e94a4ac238b0a4753ee39558e04. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA172130076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515ae1a75085aa7f8415337f36b9177c5d391301f6b3335d4b5ee86ba2cc83aa. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IDA172130080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480451be5a0c08f28d722ae011a822f3d5aa018ac0ca6ad83b557c9967146e58. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA172130083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4034f9ddf613d773d7e4e050c393f3d3cd5c8633d4616007f1a12c6bad7914a6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/IDA172130066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee3ffd9b6fa8f8ff515bce00804f3f0a121f1ed18756277f747ec71e5369a8a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IDA172130070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a029f1c7061ccb38d87a0e2b4a79f5e3b4bbc8ec4a4f026d629ef983396e93. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/IDA172130071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be2c776e20516dfebc15828b93b81d007e89717254972755a0563d9e7b34a4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/IDA172130073.