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 0x333579d2cb2af802948d850697decf3998cc97484ca2028a03ac2dbec2c4fa4f. 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/ad5c071b-fd71-4118-845e-69d6295b041d.json and https://artists.proofprofile.net/proofs/artist/ad5c071b-fd71-4118-845e-69d6295b041d.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 0x62200245df5c24dfcf551821119c2042de24846edce42dfc174e46abc01b6cb2. 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/USHM81770855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8271b68ac0ee4e82dbd60f8e57cae245778d54abbf07129b938669d661d01389. 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/USHM81770857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826b6eb380c06be254a8c8017d746e2a74b2e8d8ea7d576c3f7e4ad41256f99. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM81790668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117e091521bd7566e4cdfa332c06406015fe7bc5ed38e34ed452d90ceaa1ea58. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USHM81790669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf810eaa8def0815ec7ce0001e77ffb435dbc3dbd4367dad97644cea4ee5171e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM81790671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22ad83c3296b1f38715c0373389b1cb0c917b9b0926dedaf920c7881b3f0114. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDY41794534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205e0108d9ccdf1968af49d6b1789347f9d38d7af4b554989f4402de56b0e450. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:55Z), 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/USDY41794536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9757714b591f67317d8d27485e15765f2b13e3864899b1ef7acb993b53ae55f. 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/USDY41794565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f35d45dd645139171bc92ac4513249e52d11517fceae30e95dcecf9d945984. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:09Z), 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/USDY41794567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea2a858b908202613d6b5a8a96423a8d77e09767b136df16e6aaad49710a9e. 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/USCGH1867335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a111ccbc4ad154981016961161e7ddaf1e83e9a3412d4899b791e905e3d91. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGH1867338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d7f55dae802686ebc1f113fcfdbddda4b59f340ad578f94e0a35a7b57afc5a. 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/USCGH1867339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb34ffe388ee0cfbacb065a84eb38c11f1ffafb52bf84fc8fad2a2f059f1b925. 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/USL4Q2035408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0964063516fabcb3f22829b1c6eeee1de834704842df7d786ed058024c2056f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USL4Q2035414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c77ef4dcb514c49c2792bd606cd03bf2e0bbf93eb118542cbcff7c4aa7780. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH2224992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f8c40e01e8acb5384969e4b544ec7b0a5de47ef822ffdd19b1352aaed5f21e. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USHM22208046.