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 0x9f41b02632d68c0d30637533c5b35f511e02ff79ed43e9c3c393426d8f6fd7ba. 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/046650a1-93b9-404a-b908-a347d1378286.json and https://artists.proofprofile.net/proofs/artist/046650a1-93b9-404a-b908-a347d1378286.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 0xc68cd06ca511d60668098c4a9b9e2c44f59b95f2c98cf79e78ca812232af2881. 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/QZNWV2023421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d121eed8a0ae0fd521e359436d9acea2c197fae845a1f8589fd494cbd57aa4b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZS652189929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b47bce57d0fddbcb998125bf6867e1cf44f1b8c9e0a779bbc39e7912ba9c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2307389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9df8291932c7d6424863a4a391cafac34fd6632bc82ea4deae5a5a7764e55. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2408508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a97e7ea2c3467937c3db9986381912f40d6e2accb68e46a5a4eb8ecc4f428f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882247542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ea0ca713e4668e1b9f609512144c564344e6fbebac2e2d939e8de4c448ca0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882231973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5c80d3af3133bd00126acecf5ad397e3df3355012d78bb6ca9cb82c0c95287. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZGC2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc6ec6dc610efc1ba03ed0e2789f0c807f23dcc8bfcc360a45e1009322fdb2d. 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/QZN882394944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cdb41cf3f713f27bdf4598d72fb1113643450614c97bba4695b79941b50ebc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62138312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9df8291932c7d6424863a4a391cafac34fd6632bc82ea4deae5a5a7764e55. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKZGC2408508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e7c6cc999f6e99ddf3aea922e0e6b3d55b1b27f8d53da8083c412b258c875. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2189470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d423eca3319dd805a5f2471eae9a3dcf859aa207d1d6f4be71f7482bbd848a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2187738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2ef83af429182094d15d8b86d08feb52b50188bdacacf05fba611aff6e377. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2177680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d8baef55724b6f3dc1427884ca8b7096a58994279aba5a5ce17e58fb240f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2177891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba7f4c5b8a5612cd6c50387850a0dac525ea6a03f0dac0fbaa95bbd099f704. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2187367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e98a863d98e05be8dee2c1d8800562a162494ec7a5253cb6ffd47ba0eef1b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2187368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e1836d443d05c182db17b980796665a8cde7e542607ae66da0c8dfdad8df0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2300986.
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 0x05ddab49ce176652eeb7766bff7c7d9c82bd7602992e7eb2136b48de650be57f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZN882293655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c4535f040650cac7019a3e2539f53dbd66be257f852dfa4fb9ddde797fcd2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/UKZGC2303058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd661d0137119d7b1a3d11c2c3638b192166d206977782e6f6ba820e1d57d4cd9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLV62138326.