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 0xa94c506badefd1cd9fde2923f19b904a45af77a9e88020291c953a47d1d3866e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc28c030-1716-46c4-a36b-38712bb6b8dd.json and https://artists.proofprofile.net/proofs/artist/fc28c030-1716-46c4-a36b-38712bb6b8dd.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 0x80af1296eaf7dd7d121b41178f72ac9a0f432dcccfa0453ae52bbdaba0c23969. 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/QZNWT2379716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646482f856d27abe6e2ec83ebbf2f7ed5b0295568bbc7cfbf8571328b5846f2d. 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/QZES72483183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b1edddccbb4201eedee69eb77371738089972224efc3f2aacb72b468055fd. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZMEN2438043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d984259ce2e3bd0aba0f199b789e4be2ff214897a1af68c0ba9489848b5e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2438044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf882a02745189dcf9c951d7ae0e2a12593ec82a5b34c87beb641d74bc3b8b9. 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/QZMEN2438045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fc3f21a6abe159898788a94393185db7b1fdd80d88f14ba5e60cc9be4340ab. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:41Z), 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/QZMEN2438048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe76d4dcb1e21cb2bac6e6c15bc4ad5979bb89708549cfc16a6232fa6798a7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEN2438049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70064074866c850f23a8822e8b3cb9a291c3a5b9ac73d4b49e7daed0fbc773b0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:26Z), 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/QZWFQ2428588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7e546ba2729d793f2c5bf649b3ac07fe424234e6b37615ed7ebbddf0f58dcf. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFW2594741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8ef90176df0499e36e678be661313eed98e9cabbee46ed4ecd2f16fa90feee. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:02:18Z), 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/QZWFW2594742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcdcd8d4b73a7c336e65a8e5e8fcac7ce162a080a2a82be6c713290e352ef16. 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/QZWFW2594743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027592d33ac273097b260c1ba0a2f30546d66c827b2a1856f9b5a5ed7645f39. 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/QZWFW2594744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da95c7a11e09101b8dece9d4cb9eb55978001e404cbd05188838a34c10ba48. 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/QZWFW2594745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f1fa2c8c3e4584b3a814e208ab89978819770e0d0533d9dab05b4aeadae8f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFW2594746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eeb74c6670d8c849f66ad8056a0bcd86ad702d2ad728feabcf1542f4f4a4e9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFW2594747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ed4c8d5467b0727971d6a93a599aeb4f2cf933bc5c48926d0531d688ea03d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMEU32511796.