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 0xe7b2175d2481877ec82c48489e4377fe99e19d5c05586f71d88dceb1479a216d. 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/86812591-5fc4-4a26-9611-e24cb910ce8e.json and https://artists.proofprofile.net/proofs/artist/86812591-5fc4-4a26-9611-e24cb910ce8e.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 0x5aef64d6e6a4d48c45769a9ea208c4502ef90647178d5809cb90d81b910d5c8d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INM431600488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b99ef3a31cfd6f7f6dad47ae15f03df2a9ef833d62510a489d4f975566f11d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/INM431600697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb6496943da7d9d49eb1ec3bbc28e6cdd9c9ae3bfea3ff0fb9376009b69174. 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/INM431600695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5163096ebc954bf08f7230deefbbade1d34c8801c8947d237cc40fc988afaf5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INM431600699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2448e5c58fa4ac267ed59800788781c7d96c54423714b504e9e880a0aec44042. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INM431600651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73845fa92c75a154b499da182919e52dae65e9d67c143be0dbeb1dc85007ca5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/INM431700196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3095f9fbb77c68189a2a59a86b9cb475e9417244e2adb532878b0f6aa2d5a. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/INM431700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d200f58da1973106d9641089cfde298bd76d18a2fc2780f1322b1d1b509155. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INS181900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ebe9991b23240b264dff347bf01946a94bae934918c4c62e551ec6f9549e59. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TRU201900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8dc1ff26e3eb64eb0a975877aedef2c4a44e598e34df26c9b3ae6ef777cd6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92189791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb69b692c271d77b8b088f0f9ac7c5c933c269905ea4a220e9b168da8c19a58. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFME2190377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66337d65093bda5dca4b97d349a21bcfadec2287ce12c488313d467a237ca481. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ING501803292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28103a4be3d44cc3ace54657e1729e88be99cee522caff9b8a510e4ad5180379. 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/ING501803300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05120cfb87913ac5bc8a3667c3a79403d1b115b7d98a94759d670f1ffc9bc86b. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/IND712213995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac975ecfb3fa8c5244ec629455dde82074e8233f870181cb6974b8ea346254d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IND712214202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb03ec5208923adbc63ffe07302635915fc4423306dab5f8a97d5ee64465b377. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP2249724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90aa4107b7e5e6de0fc2c2b7b58c03d58ec9cb82f91ca0be8a955fc464da00. 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/USA2P2429143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1db41651ac8abf36aa1f6b97d93f98160a4f97a483896d4e9f827d9dc3cf1d. 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/USA2P2476120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c329dba7425784767b6819d9a700496f739776cb2d0a423b9d119760465179c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX762522836.