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 0x59c2fe0523e0c7102ce1d2aea515b65f6085426e5180b2aa588c03e831a8e6b6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/534675d1-b3d9-4b3d-8938-576017daf84b.json and https://artists.proofprofile.net/proofs/artist/534675d1-b3d9-4b3d-8938-576017daf84b.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 0x52f39b3bb8d2e0ff8432652671ae3a6f5405e3e4603897b719bc67512e046212. 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/QZS632116540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb180ecb52a8e3c6ad12c1faf4c2c37e85bc526d6ace9615622775dffdb1b6f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662102557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2023fb8f2fd2088e82c1fb02cbf0ae4e25a8bf50b8c71affb24fc3e9593599. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS662109782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe19f3dbcf8de5c774833e8fd7dee574668a89a66a458be2d4d8a6ea614fa9b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2119708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c146a04af87f1aefd86a8bab3cd3d4757a7bc51df48020a617210ed96e7e675. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWDE2397748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1349f3d0f85632486c5b5589dc9a061c8d75a8429c7d9d79dba2a4147ce5469. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZWDE2397741.
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 0x410c11db228e73e33b15253486328113a664af18db4988c6a7f8434e28d6cbd9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWDE2397743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75d10f9d5dc29a203fcb75f696cfe381de7684e96ef443e1a8d4fef6d11f62e. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZWDE2397747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7adbf1c2bf51139ed2519962771d9c393e0a8b98eba2c0a5c580467c573770c. 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/QZHZ42293639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff6261101733b39e8c0620e3087630ca591000ff230d4a6b2489b6e93f683f. 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/QZHZ42293640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89c7ccbfe1a3464028657302af725e4bbe21fd91463b99c60e80d553036b9b. 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/QZHZ42293641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4dd4f4c31bcb2c5bda1ab1b9d68f861253f3ba892ef539f86da6eb3b1b9f32. 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/QZHZ42293642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1476b67d11a2e5d7e6e2ddad4370e8227646aef882bf36856c137856dee76d. 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/QZHZ42293643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbb00b1bfa6e1017fb8fe3514cebbe101727fd71332b9c33460fcadeb2f5a37. 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/QZHZ42293644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d60a4acede7c5955d2b8eac5a273cee27b678c28ea48f4629f4f526cdc537. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZZEB2340207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d21a54de275c00e256d356d21989ccc129bdeb455906f4c8a9c649c0da44d43. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9K2456158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad7acb7a4e75b2bab534c1da3d4fd83d9526d6fed8d23e1f31a62091b0c3464. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZW9K2456160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08dc178c85ff14dc66fae4b998eb1fac730c45fc23b49a22b25d72f0965fb2. 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/QZW9K2456163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3dcb4fcf7628a2a5202146241a048758856478bc4e2e73f04f514cdd8ddaf7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZW9K2456165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f205cd081a875c4820131c3857813913783dffedac2b3ab6684b399bc30ac. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZW9K2456166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9c344eadb82377d1c01ca3b9f63bbaef4b6af3caea94c184e97159579bd3ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9K2456167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d7bffc52de0b17dc8f1e5d84ef07076657982f6fa972c0a4622921915661a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9K2456168.