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 0xdd6b34be4b0f409eef51bf46b3df6fbc49da7b6aefc6e2d2eb81406228f78553. 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/c2aad2d1-52d0-4b2c-aac1-8032801deabe.json and https://artists.proofprofile.net/proofs/artist/c2aad2d1-52d0-4b2c-aac1-8032801deabe.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 0x5d32a13b70ab61cd9257f06fe692ff911ef7b9e540c0b27be4f3591e727f709e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN62103310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d94b90a67ef1410db127fd6107ce5d2ed29ee6a8045531c68f4d25af819a30. 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/QZHN62110264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3ac469b4f72024d77ce8fdd33b65f86d510c19cbb518d60dcdececdcbf5d9. 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/QZMEQ2293981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eef00dd747b850fb975240f294a1f512d6cc2e2f95fb11e2edaa302c5d37ac9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWZ2259125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639e1cd3f4a0c18d14770dbd806555d646a92d50a3fe8119e9084bd6dc3e39c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWZ2259128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488656f98322607e1d0c210d5d3946be1d6987e67dd56512000d0048a0558aa1. 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/QZNWZ2259130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb787f068f44bfe9955379de1672a648e1c291213bd246cc469ca7cba1473112. 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/QZHNA2363662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620f107f783e6d6d60b4922a9418a54e9d5e3449bf2a38e6223f995dc4d62523. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHNA2363663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a43c4889b10eaf3c400197924d69875c6790d7fb6e56220a5f43751a0005a56. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNA2363664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b36027e70cfe94045ca605ce4ce7e280dd11d7c2748d214fa5bb33c996f83. 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/QZHNA2363665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43d141c8784f9675b0161e5e76791f3b499aaa871289c6c7145a0c2f9a8eb0d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNA2363666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a515a7cb5d8ce23bbb46b99a85bbb239ae0b88919231bf74f02a9f74d357d43. 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/QZNWS2303998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a29587bfee1a09fe130599efe4378c71fb1c2126ef76fa2a7e84940fda551. 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/QZES72413401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a29587bfee1a09fe130599efe4378c71fb1c2126ef76fa2a7e84940fda551. 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/QZES72413401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c50771c4025b7f38e68f67d64b2eaadfb7141500ee910e4baafeea18f5dd29. 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/QZMEN2484795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929acc22cd456e09a6fd5d87667c9660d82b78c82c1edf06350a2936a76da4d5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEN2484796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af38140bbffd2c1fc9845cacaa980d104652c488d0f4879ce359975f37fe192. 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/QZES52299014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f1aad197cf5a1b81886f8cee8524f6f6f5ae35f02941010f9788b257b3a5c5. 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/QZMEN2484797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4890b7f2a75ef6e06323b6535708f5046815e2c022ca1f6b801c0108e9ece8b. 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/QZRP52277797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d32a13b70ab61cd9257f06fe692ff911ef7b9e540c0b27be4f3591e727f709e. 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/QZHN62103310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc14f31c5ec255b930cb5708947194fb19448d31615807aeaddcbf569200a80. 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/QZMEN2484798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a0a0f80879946981e017dd908511489b17bae7ea507aa55c2aa5cd1ceec655. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZDA62587866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37a0629b186dc15f49a853fba6db157d26adfd385aef94c674336a1665b1b9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FB2571534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b29e6f30feb718168955eef20034dc4769d6a8c28ea7d5f30c5ba5ee96851e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZES62108526.