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 0x51a51118a87ed853b2da880bfbdc3911af850d6a6c8c11c9fe0a1f59a5231613. 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/09433d34-aaa2-40d1-8a36-a406778629d6.json and https://artists.proofprofile.net/proofs/artist/09433d34-aaa2-40d1-8a36-a406778629d6.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 0x78664e4d7385e294b36c2efb868536e75c341288349cee50fe091e90235bfb1d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPB601302699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78664e4d7385e294b36c2efb868536e75c341288349cee50fe091e90235bfb1d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/JPB601302699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9845cd2c65d1cbdbd853f03f8caeca02954480c6422d41ea628dce4683308f33. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/JPB601290432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ead66a6b8cea193d41787215785a371d6de9948be297e93d9de2e2d0f2420d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPB601214601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a59a0e192b3bd88a492c5f897aff98a82bce2ec2eafaaf7e22ab3fb5a3e725c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPB601168601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e08e422c164e72fcec65199e9f46cf1296527ae85c6b24eec858895e8f272. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB601230401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7248e24417cea25f4652f0f50225da927ecdcc4e13a4121351af3d818678206. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPB601400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a4721b7e34b94b11cd252c5737debd08f08fdbc73ceeaebbc97f2bce5ed7f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/JPB601701968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083d7a77fc1b1e6bc0d73084eb00a30b765df727b088231601646dc31e97af36. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPB601800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbfe94e2146c775f3095570a16ecff5289992326db29f02a14f3fa609708122. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/JPB601801663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df87693da64bae686a01434dfb6be5bfd754f8be8e9012a1d410c2cd432397f. 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/JPB601602210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59ce1404e8a11e193c99aadd7340e3043af209fad8f2b6457c62688cb78202. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/JPB601701966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c5644d70d2bfeeae0b5f41e79cfb3885fdd05944b91620f9f5bbb14751be00. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPB601700473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d24f4b85737147162ddf32891b6dd2e5f85f20d06d443ab931eedf305d1439. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/JPB601801666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd943d1f6eb7cfe0bceafcc415e05c274b809655b4f5921725b330972a0bfa246. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPB601902015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2905cd22d5df99445f44d9b5836150b27b3a4e52f3191131f9d149b50615635a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPB601901920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b59152735f210bd9f1536360f89d3219aec7fc146e3d79828660c8a9c2173. 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/JPB601901922.