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 0xabb5b735f9ce2bc3b2be6c8190162bfee619cea715a44f58b54475227a718c1a. 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/15e52e94-889e-458e-bcf8-15c96b52673c.json and https://artists.proofprofile.net/proofs/artist/15e52e94-889e-458e-bcf8-15c96b52673c.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 0x78b9a822a9d51744030beeb516c299e9b21d10ae72050b08a075e5ca7934526d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIF2489971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84301a679ed3284f1ced56fa823ab3cdffbdf869ca9ed0cda9b691a2cad40a75. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIF2489978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26d9e5e584cb233f98ca35795db5cb6fb8016835247dd2e4fb947c44eeb4aa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIH2468379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10233a4bc72087cb04111cbe3e5a5aa6efbf9366ce75507d040d3525a8ceaa7. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJP2507930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea157741caface92d106c10941c22468a3484af674ca7dcfd6db923db7a07d3. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJQ2507935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9bdbf6d13bab0622d5230ee0cfda8acb2500047f66e9ee574409d35ee97b5c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJP2507942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e198f23b3642a2c51be6409887b8bc5c7a84d293490eb5c2cbac54132e423. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJP2507946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3bd798071a7078602181aa71443efa3aa38a200b0d3024bbcb03af95e46b2e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJP2507951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ca61bfe0e9f67e0e8a8c467931202d4a35202cbe13736eb0db691211aa961a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJP2507953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9974ee6265810e5a5c7c7376e42bc485623cff09178290397743882eb374016c. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJQ2507969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087ee48883618376547866c5e6c62a810a69566eef73b9e7a00e9e493ac3750e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJP2507978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8a444e22e41388cd85d8d38559cedcd20129d73fea2a22e713d3858f959e74. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJP2507986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fd4fe5ba4d8568780c8c20768cb6e2dae8c04cd6d58592baa18e8d62f97bef. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJZ2596613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca780f8dc6cd24e3b455fd4538788323a5bb1d05d973ec41db88335a869fc3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAJZ2596631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e886066dcbd42b47c5f008dae968bcf7cf12e0b8aa79bec4038f0885ee5dced. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJZ2596638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e67ed840cd60d118d464ff71b261b6e12b21bfbd55f66bde39f297dc939af84. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT65W2589568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa9bc11842751888c0e56b9a5c4ddf85a9ffdf2fcd0869dd2c8d851dabae902. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QT65W2589577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26302329946df3c7fbf3bc351ba9fc5f3edab4e1500b5bafaa52e8390f5d0b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65W2589582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352bfb08b0cf00f0a04da6b5de2acaaf0dda7b377ea60563755447edcd608ee. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT65W2589587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fa9a6411c4cf86b2b831d2985b8c508fa5ebb888d34bba2d5f4fcf0f7ddeb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT65W2589593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae81866a9a77f4d21f91f72e01d4148bd09f3ee59b494a906c271e2c3924ec. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT65W2589597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcf0aadf62efd55441cb2e52e1ac8106b92ce0d4bdd1b8dba688ab724f03b95. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT65W2589606.