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 0xb479847d74aa699bb7da9a72f12bf2d1f0abd4e1a425f9f8a2b10a25f9d5d944. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2e1b9f2-2294-4e1b-ac3f-013d7167ebe7.json and https://artists.proofprofile.net/proofs/artist/a2e1b9f2-2294-4e1b-ac3f-013d7167ebe7.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 0xdbd18b4a3a40b47e32e330263ecb3756f401a349f7441b5bbf8e5a52876f83a4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEMZ11500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3a117faa43ecc30a6d0722bf02a2e296dccb54c6209b188b75ffab9e8cf16. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/DEMZ11500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3baa020dfb6233bd6aa4fdd334a6c6e5ec6f17276a5ea01f53c2a0f5b0ebc4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEMZ11600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940df5b1ae316e7fc216270ae71eedd6e985fff2aa33e85e741f8b1edcf75a8. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/DEMZ11600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd819aa0b925f82098a10048b15c051d1d9ae3b3c69463fb919520ef5f952fc9b. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/DEMZ11600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23e924e44ba01ab295d61a575459274b34d6b87795d946fa2d32bd104fccabf. 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/DEMZ11600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b9f309929c65f17efd83e6c5ee4c528bf8ed83c61dc3cabcc8a4c2ac964350. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:36:35Z), 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/DEMZ11600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b1c3ffa74890558360cc95a73697f8dbe675f108448c992a3bdbe13f357c0. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DEMZ11600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb19a24435f46a8769b173e9f5e18496ec8fa389b55cd345b2da0a9b6a7bf6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEMZ11600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baaa2a21693e8817c2210107283e53c3c94721d61b0ce0292eebb69605d0b62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEMZ11600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7f864425e590a2ba28ad95e97cb9a3261ba6678706411df08b47ebc9aeea37. 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/DEMZ11600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a41f40d4bebdc4ae309997078002a3263e155283478b1a76bbdb366aef16a3f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:51:03Z), 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/DEMZ11600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60528d1980fc382dae237371b81d55918f1881c4d966f13283aa88cc98b0f731. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEMZ11600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e836915f80ec163a7c6fd83c01c174130774c9619995bd33fd6215d2ac187fc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:41:03Z), 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/DEMZ11600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a70ccba07a787c495594327d6311b7fb253976b014eeb595aac0128e07cd61. 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/DEMZ11600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71423ac19537ef40a5efb36cd546f4142efb683c6d3fa2f1e0d4b92a5ac42f3. 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/DEMZ11600080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a470af87bec220f2b9bbedae4c03d3d19a662af68959b3b3935dad08d5406b9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:18Z), 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/DEMZ11600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836650350b73d3fa88e940d6307faac64505f395f0da1a8efe95d76b17ad088. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEMZ12100897.