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 0x136807b97ca723122a0ba052d96731519f28721f63af25030249610473e6d5c6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22e0902f-5765-4659-b13c-1d9b7ac88ba9.json and https://artists.proofprofile.net/proofs/artist/22e0902f-5765-4659-b13c-1d9b7ac88ba9.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 0x91cce3c556376dbc2b9ad93ed7980d00fc88c3737ecf82206bc46a2afb074073. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:14Z), 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/TCAFZ2129232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d649df5b984d7abd4b45af0b472a56a2c3e6da9fc077bd6b86c4c1d8a18a2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAGK2293009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9be9089aaf82a3192f7349a9cb2db86b969d4c38a7492e8537a3440121004e. 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/TCAGK2293022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb928eedd6c0ff90d99511922bae4a1ca4d06a3ce0acc184b3ede70c305e88602. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGK2293026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3232849aa2ea44000ae112395c41e9a46b87a7a307e9fb1507205576af671c. 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/TCAGT2345231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e2261335ce950a86de4ab1558f2777e3cdc0b3c857a8e4508b2acfdc41e623. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAGT2345238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88dd06f09f7ca45db4f5f8483e893f8c4ee39bc0c8b5572d053ecd7dd28f83. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGT2345243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc841e6b0d27b168b77d636ea30ea0ba954e3eacbb958ce22f0400f7abedd6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAGT2345246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9364e646fcf0e179b29354d8dda1ea38e5a63fb7b03530ef1ab16c93b88f6c03. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHC2309173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f57b524372916d878032355d178a02d0ffcae0e14a4ad58febed4b8b4293e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHN2354925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d4c28397a7ba707dd21fc142a24539bb228fde8bcb90b235837f285cdcc85. 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/TCAHN2354927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b9079c9a7622e779f76503579f1a91722221e110dbcb817aa676b05aea3d77. 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/TCAHN2354929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be387e82625e38acee6a44ada17552236dadc2215634bb1e3991c6b324a4d1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHN2354931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dca7386e32cdd12c3a2754643fe5fedd77f5ca3ce9f26ee9f8eed59a1a5c2a6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHN2354932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b64201659e9bc517e54360d4c5a473076f3bc80614b264d141d59a7d3ce1a8. 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/TCAHP2355481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e70a39195b915b0fbeb334623d4a3da148088a9e7bf17e2236968da702c230. 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/TCAHZ2462072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab9bee9bc0c5cc026dd33a529a28066c68bf8bb3bfffeb84b620a85c268523. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:14:57Z), 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/DGA0Q2467105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9a9469dade8eaec32f99bf16f9c081798eaa6c4a27019f53755212c6d3cee7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DGA0Q2467106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222fee0bfd12165e108ae5896bd4a201f3787ccd96ff9ab6a01ef7032be7e095. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:45Z), 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/DGA0Q2467107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59a7d26fa51b46e7aed0396ccef0c6be5143ce1a48832b6f8f331e0174fe665. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DGA0Q2467108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21de752e696d567547494d1478671d790b56a198a70d3dcdb0e6bc317ea54d9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0Q2467109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4a8be440f5a8a4650702798ff5feca65bb4bd6e06a3131d655bc707335582. 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/DGA0Q2467110.