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 0x256c6433dc030462dbb1c72b96efbd3d07698711c9ad2b3d493ad5075d5ae6fd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a0e78f7-4b0d-476c-b684-f4eb8c3a65a3.json and https://artists.proofprofile.net/proofs/artist/7a0e78f7-4b0d-476c-b684-f4eb8c3a65a3.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 0xe319b0ecde827e10884e34a9bba4e4518c9e964f70c4cbcffa98f88c1470e499. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:07Z), 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/CAENV1732345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4067fe0a5957853f4ae848877172af9ec17afef09615fffb4dd951f8cc5825. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAENV1732366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89373df79cc7920f87c67fe7203b9810280b939450501733ad6a09b3391f4aa9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAENV1746007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c88fed2df61f60c90c862b7c021aca746a0f33e6c33d0e2e696db999d92662. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:06Z), 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/ITFR81810044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4325bf1e23b04cf6131c45287de619cb59f989276326990f342a40d924b8301. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ITFR81810042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be63afc1b041f5df9dcac3d334ba7cc2764066708c2cd8274ecd8f2ebecce01. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITFR81810043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3c7ee852319930d2872258ef6ef83fa8b8ce80169978e688465989154ed135. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ITFR81810045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686a5be30b39f577db8c9ad4c0a974736a4fa09104749cebe6843a03ff1aac3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITFR81810046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8181994c7e4894eabae4fcda901de4a17cff88641ef8becb740ba0650fabab. 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/ITFR81910020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8181994c7e4894eabae4fcda901de4a17cff88641ef8becb740ba0650fabab. 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/ITFR81910020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f23c47986da6d915c7bf2dad0b14796270a595e23579be47f11f0be76a0247. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:30Z), 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/ITFR81910039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490225ec40800bbaada0d337e399fe94a2bb262baa50a8ef54dab1229dbf586. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/ITFR81910040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68147131dbfcf964dbafab956176303f19e271097bb2050fea141d285485d3. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/ITFR81910041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdcd8fb9c99ac325d1e2d455ba02c7b6ee5629caa9219cfef95c739ddfed2ba. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/ITFR81910047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe29b0492e2e85c30dcd58a68224c4479f3017e7e082b311530630908af724e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITFR82010042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53bb5150053b8167c27229f549c564a582cbb3e37fd353d1a855d23c25a3089. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/ITFR82410020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ba7112b35069083bb7e77e1bb82ff9ee1d7b62353fcc5f5fdbdb424758e73. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/ITFR82410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7cfeb30936af0556f2b17625c7b11fc9b3f5052b8a9c6c3ae5bb604ffe649f. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/ITFR82410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e2beb7d7bf6467230a972a970d41703f1f50b543482023743d179da59df99c. 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/ITP841800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c5c1e259bc7f830df01cd5f9bc583a5832270a1f34a2c6121bb688877fd2e. 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/ITFR81810072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0111e4973506ca4169524d41897b14de2c2cef72e0963a3e5f5cbeb86688b5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITP841800300.
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