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 0x795066b33355fade9a2d1807bf0b73a428b575c9a967a480fdaec55517c272d3. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1253fe9a-5214-41e7-861e-fb1d7e1cc2d9.json and https://artists.proofprofile.net/proofs/artist/1253fe9a-5214-41e7-861e-fb1d7e1cc2d9.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 0x660132470972d6487433638f06f6bf514aec209fa4f781b7f7af9e4b63dd827a. 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/TCAJA2408241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d997260daf78868385e2610e675a28e0e6323096f510728d42bd74f6a990966. 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/TCAJA2408250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e654929f18f28bfadcada457befb36f8dca642453509b718c31b8da7ae0adc. 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/TCAJA2408256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf39f951566d20dbe447f58faae4286efce984145dc1d5a77d8b841c1759a09. 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/TCAJA2408258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb45cc31388a495971c0b74fa47e0d07e1a90b45be0a294aa4f2a23092a3edae. 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/TCAJS2597540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016bafdfb0ed8bb9478b4e0451388705748440405589ce473dca74b908e29e6. 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/TCAJS2597544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c2deb24ebd94751c4d9662dbb03422de7825fe6e6775940a4ed321b894744. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2597550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5212a724ea2ca1c0a83a970a08c1e8374a2688508c82e735ff5b3465005f2e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJT2597552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e2639e3b12076a3685de963e42c603c1639bc40c5f4338f83b22cc6b1d717. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2597556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6811bce7036fe1b60837124cf464710bc80c8efe379f2e1f2288913e446b7c54. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAJS2597557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f2a15157b06a481de44cf4f9f8d1008671d129cf1690d3c88476d3db81266. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJS2597559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6942f077859bd3a4dff23c7059bd2995bd6c082dae9d43a0ab723176b0bdc2fa. 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/TCAJS2597562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c01ba86c3e370d87546826f0fa9834cf489934a120751852dda8f7a5d102853. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2597565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a62d848bf26f4b2d4f626577594f11b4b8122a90071e025623b6029d631244. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAJS2597568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ab7ae247ab908424e8da7d9df4b867e5bfc65cef099828c733cefddf010c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJS2597569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbc5e1a64779703256b5ae09b0a468b956a28dfe01c6a225f2535916ab25ad. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJS2597571.