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 0x80afa825a04149fe7e37f646f49c80bb287f5d144b4af9cd83fd4b17b5015352. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f94fa57-f9b7-4fa9-a10b-48cb14f14212.json and https://artists.proofprofile.net/proofs/artist/5f94fa57-f9b7-4fa9-a10b-48cb14f14212.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 0x497fed6f5785a52de6b955658120b8372d03cf69e96e1501936ddf94810ee045. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12358054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089f922d0efec38ade141922952d1c3a19303a5d2280caaa317b55c38797c05. 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/FR9W12358055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a8c73c7924aecda8b60d4074e5895035b992552cfb712f72809cc92516982. 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/FR9W12358056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e3f3a41bb860796c76058bb6f32efb9e6c1f72424f0acafbba10dc2e196aae. Chain 2 (Bitcoin): anchored in block 956960 (2026-07-06T23:19:16Z), 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/FR9W12358057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe289bfdcc422559dafd80689929401154829ada2bd63ec688d9e0c6c93f78137. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12358058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758ebc19360529ad3b87186ab974d7a0f37984480cb0ebcf2b012653b345620. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12358059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694fdd6e288e2c44e95bbb804a70fdec6d4b2cf9f6f3596668fbbc196d660f93. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR9W12358060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f3f0c2dadd4c344036a414952d2fe8ce92d9563f4f1546f4a328fe09c62c9. 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/FR9W12358061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e27636e3fed44e62b7ce023ac682c15936ab31700335ccdd8eaab76a471112. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR9W12358062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7bf3c4a92c2264470311a34aacb8472a46fef0694587e9afd352e616e032b. 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/FR9W12358063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599efc2d0b1285c8a933faac5cf1f610d12251dc20c566e8341d999773b6e3c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR9W12358064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758ebc19360529ad3b87186ab974d7a0f37984480cb0ebcf2b012653b345620. 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/FR9W12358059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe289bfdcc422559dafd80689929401154829ada2bd63ec688d9e0c6c93f78137. 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/FR9W12358058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f3f0c2dadd4c344036a414952d2fe8ce92d9563f4f1546f4a328fe09c62c9. 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/FR9W12358061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089f922d0efec38ade141922952d1c3a19303a5d2280caaa317b55c38797c05. 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/FR9W12358055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe289bfdcc422559dafd80689929401154829ada2bd63ec688d9e0c6c93f78137. 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/FR9W12358058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f3f0c2dadd4c344036a414952d2fe8ce92d9563f4f1546f4a328fe09c62c9. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/FR9W12358061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089f922d0efec38ade141922952d1c3a19303a5d2280caaa317b55c38797c05. 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/FR9W12358055.