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 0x4579f7b7e59940d65651d799da033684051070b10f4a98e429b1581a5a401663. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8e2e59b-9248-4425-a5d4-793bf564490e.json and https://artists.proofprofile.net/proofs/artist/a8e2e59b-9248-4425-a5d4-793bf564490e.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 0xa3d950c890fcfc1b4d1e7ec394ee24be89c989d9c37e4ff8ec42b222610268e6. 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/MX3741700735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213c1375c31e7fbe60ab67286ef4baa2bccb90aacf4e767ae91addc9ed40db9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MX3741900263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32731f2182568a20e543c71ce3426d9cf26bc7b92ee6d92d027e336e8f2cc210. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MX3741900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50792e8cc3be9cfa26c7a2343e770431a077487742e1681723ff41c4fbf7dd2e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX201928604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b11ef7eac95f5fe97118e09d6537d9755e7a750526892d929d3a1f609e9a708. 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/FRX281932216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baf124696bb4fee31091cf9f236be606ff3a7401b5495262141b0bb12439ace. 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/DGA062066512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c330e37df2caf011044760bdc623a704320f8449b62c78347133db856ed721d. 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/FR2X42143824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae374659b0614bcedd0d45d6bac5296faac8115415bb74bdf41f1295e12da5c7. 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/FRX872025674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baf124696bb4fee31091cf9f236be606ff3a7401b5495262141b0bb12439ace. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:00:10Z), 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/DGA062066512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5f782c630359bffa413bd55fac5485b503b62e40ed9cb849ee129953dfce2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR2X42325476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd2fb3d04c6c6f1320df95d5c766e47bf240e41a08ba44e7300fdd327685b4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX452302696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e06995c916eda5ee9ef78ada53e981e91c3c4438357820807faca0d36add5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR59R2269822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2662f8e637afdb249767a2414a3fe03411981a36a7b92a2c7ea8d61df9cd537e. 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/DGA062213495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125cd14857284b2d500642d3eeb6ded102da2edff8a4cac707d6725e88428c2. 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/QZWBK2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43476ea518fed7a3e46e94e77ffdd07bd5452051b4b88ae3537a351504742a6. 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/DGA0R2454316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919acf4982f0109d028cfb7ab1e9a35f55368b666f47f0b7111219b75a4e83d2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:43Z), 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/DGA0R2454317.