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 0xd481a4cba3c61b1a3595e74bae05e919508b0741eef3b8a8ec20b72dc4b3cd62. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f508f2b-6126-4e5b-ad3e-d0f001be8ac4.json and https://artists.proofprofile.net/proofs/artist/8f508f2b-6126-4e5b-ad3e-d0f001be8ac4.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 0x1846eac254c169a8659988375bd6983994c4485499127d5cce01c625ccde209c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81312248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e1578dbaee692f2b5d3ea08a6a296b954b5541239d0c4a4aa94d5522c37d71. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM81312250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2b225771c2a75ce0481bae060391aedf66c2dc55058d49430d839b85123f3e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:32:33Z), 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/USHM81312252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031969b66883617227df9b0320ab92653b141ca4880539b4889ae685f9d4aa82. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USHM81312253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c342a54908e5ecfae8a56795b867b30c6a0abfd798cefb8d89a4cfbf4b3916. 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/USHM81312254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98efa9211147c97491abdfb938b74b12923738fa07d6bb3f3f76c4f55e0028b4. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:54Z), 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/USHM81312255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630f9eb9d0db69d8c2bda7dee65b9a9509d327f0f9f921c0db443f484e7003a1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:46Z), 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/USHM81312256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d745ec85069b0f028587eed4b3ec60f9fa767864b202162d75cd0649a2a423. 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/USHM81312257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b3e249a58cb495d7aeee699bdeea7636184aa47ccc58d72e52bc83682e6998. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USHM81312258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d12f9f7b2ef0a4a9155364ff3be99f0356231ca49a318d08699b838f88577ce. 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/USHM81312259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cb39503e0b6389f9c4c9f950ddb7fb47c4fc4cca03255c41e09395f70751b0. 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/USCGH1938054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e886dcd59a3e577a442172feac8ce842a37e7fae32d2308de54489b76d9f667. 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/USCGH1938053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89bd3f4b9cc76a79a6053b6e1bc2fb7a74b995e8c201ade0f34a7271a9f14bb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:19:23Z), 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/USCGH1938055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd13dc451a86135bf66191475597b2be83d34b714bb84d0da0dd50dbc3969cfd. 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/TCAEH1919077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cab11e5927c3952eba9589a9e62ffc915988b85ffaef3fefc1fcdbc3ffec4b. 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/QZTAY2425349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5572a8e586e5c49aa930d603c29fdb0d5f525583493f5df25451b2b616c3ca. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTAZ2459182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe665e368da9af0d71390ab998c22e276ab0c5e49200455eedd13ee4e3485e100. 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/QZTAZ2457011.