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 0x5b0ab83f5436b11f5900a78a77200a62122be0d8f7ae7c1c029d36c735c9aa08. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d8995e3-b301-4f0e-a791-41940f2d977b.json and https://artists.proofprofile.net/proofs/artist/1d8995e3-b301-4f0e-a791-41940f2d977b.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 0x4339b337d7ff6acb116a28d660462526fb08a096ea81a5a9f3e95f1e435dfb45. 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/QZDA42461330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654fe86954c30b24e81b83481373c6106710b04c6b301bca82c32e066ba0cde. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL5HJ2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0c3604a68895001aec6ad825727defefae89b9a4b5a1bb584541120c08111. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N22429565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3858cbdf5049ab76e69a84b1fe224acc5726b052dce2688a73aeed2d405460ea. 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/QM6MZ2304685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451cb764bcc9a3caf108a6b79faac280a8a96ed55231e2bc6e650ee8105060e6. 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/QM6MZ2304691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107fec681a9dfcfddd6ea8a581f2a0e185fcb131a6bc96894f9f7a2b24afea01. 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/QM6MZ2304692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c88f1b50af863704271cde9d53fe5877e76d50f519a1345363ae7f89927b74. 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/QM6MZ2304689.
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 0x20078841168ad6d3a84c75905bb113b54791b89c9362e3e93f9e877be7db847c. 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/QM4TW2373583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407fd9cb763011ed318d30997674843b91ce6a4dfe7b3ab95f351714653f80a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL5HJ2300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202b4ec63c5053abe23fc3ecab8019e216b0cc8de289b2ce5dedd7b65b02d36. 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/NL5HJ2300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e2daa55bc6e9b8eecb1f34dadbde08c15f75761d79fa58383411c5178c892. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5HJ2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7672d2d13563fdcfcd6fa0c36b4a53b964cc0776fe28a7b3a19f145a98b70a. 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/QM4TX2561986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a756b96fa89e60f306c71cc4869d5e36e72c3dc13c59c1cf216743750446635. 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/QZDA52537631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b6c501063a2ae0d346d8f1ed516f5e0915ee18ab79af91ade1affa41ba6e12. 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/NL8RL2454365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5b76da4dbe0e6aa0a2b95aa44d25e70cce04ced2a44b5e7978faa1f675972. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:38Z), 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/TCAJH2526959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda020e8edd940b40990cbbd6efc0d4c5a437631d3b94a9dbb488a5884f4dfe98. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAJH2526978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202e8aadd08562cb5b7b19844f508b0d92f28292b8ca4281db743324b0bcdd2e. 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/TCAJH2527009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dee3d5504d5dc6619f0b245684185dee2dbbc611ea95cb1654e1e27a16ce31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAJH2527030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358ebcbd2380439bc8ab03c8035f6e9d7e889744461569fec84b8431cf75b5a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAJH2527273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a57b2c62ecbf3b8689d545f57fb74b4c80e7223a8e44d253cdac79415ab8780. 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/TCAJH2527368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549b4c17fa87e62a4f4712d070f5614c8f46f9a44fbf0acb8e951a1fd4450c07. 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/TCAJH2527401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e1d9896fda8a36c4c5f4889af0b593be7b867a1e595b796eb4ab48e90f921a. 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/TCAJH2527422.