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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06f12ba82c0b10c6130810f22a8a083741ae85f2d25796a00490682ab668db. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76aef17a-fe95-47c6-8b97-d83654098826.json and https://artists.proofprofile.net/proofs/artist/76aef17a-fe95-47c6-8b97-d83654098826.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa97722604ac4a05c1ff2242a9262ee03843f8fa7422541581e7cf2caf9f6aa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UKXN22577158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80602ad131efa4b1996d4d60a2f8a198a81ebdb659ebe8c0ea715cf3569ad91c. 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/UKXN22577159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ad5cd6a4d27e513a364b072ac55028e5d48e3fb82d304098db8a3808b406b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKXN22577160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8f4d2f9949db9bf54ce76ad03ddb511611f37c8437f54a04cf5b9a521cf0c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKXN22577161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07512a9760864516d161f3cdc8a98f6b23f99504dd956e1b86b7f29d7d2f78c8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKXN22577162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dc4116d4291bc8b5583e8311c45de2700dc6b9219c5d4557a6aeff083da71a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UKXN22577163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441127ef5607b405447d481d7b90e64345da3176b0f89c98156a5975b5cc5502. 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/UKXN22577164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd848b588eee819688a5dbdd27c192fbd0264488cc2273489b122eed209af0d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UKXN22577165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd191821ed60d809884b4dd57609ed1621d72f2899ded725a12ba9a58ea46f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKXN22577166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8e3f14b0cb11c9cd29ae6d33a968f774c988a87a7973a9c97642ec9e09258. 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/UKXN22577167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb525ccd42e626324624c196506f89c85497ecd309fd3000152f09bf02d9f81aa. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/UKXN22577169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1aeb4159c00402e3fda50109310725818eb8582db2ca7b3916a5aaac41e4d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UKXN22577170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae375b42bdc2933541f6315c273f0b7fdd5aedaeddf268093c3b624fb431ebc9. 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/UKXN22577171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ca8034c66f103dd404c33ed9c3b0bfa5d85ce13939737c129421e181e0998. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UKXN22577172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54c5c0423a34c9305e25dc325259c55623e64d28239ed2d1a8799268db0dfa7. 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/UKXN22577173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36f35cd0d8cdfa62369b7071f3efedfea829d5a56565f4d0684a3e4a5cfa08a. 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/UKXN22577174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac875a8d645c41c89d4afcca47e49da6e93b827ed684c75b553621d63cc685. 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/UKXN22577175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb384c63976242c6a393ed2f7624d84a0bd1dbc69b4641964e43ae6f822c27b2e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/UKXN22577176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65d551b727bb69d9866c0f3ff0d08c02fc7120fbc80a738937df0fec4cb107. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKXN22577177.