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 0xfb72635a291402547531faf33d0f6a8a765bbe67637439ee3a033de7c8f360f1. 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/034106ed-2257-4121-8e71-3bb2ef85d28f.json and https://artists.proofprofile.net/proofs/artist/034106ed-2257-4121-8e71-3bb2ef85d28f.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 0x537c665a856e39c4a28ffeada61479f596ba841e907e7a619fb6fd1ced357d7f. 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/QZNWT2212040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136549238727650a3e231f9f1f3d6ba11a32628ab9fb64f4081e1ce8bc2102fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2212042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe642775447f096870e537460309930f32da68ee22bc4a05357bbb5c5b441cc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNWT2212053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e747ceffd7e3837a644dc9506fe4cc3020b9dfc1adfaed14d4fbac564cb112. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWX2285062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670e216f12e287691e3eedbc79e1d7105409d5a1e8a71e6cc62d7284e9e50c0. 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/QZNWX2285066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089e066b5de24bad0d53ff6643115ee0a1a2e33be4ef1d33cff349a1fc41cdb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWX2285069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18ffac3339ed1f6f5425f96aa84d0a74e9ad18fa77c821c17491a914326aac6. 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/QZNWX2285070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef7b59513ac223dda81d47ddbae67012129cb16fc1656639180725ae927b071. 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/QZNWX2285072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baf5c5d1d5b5f9a545723e988933bf585b05db5db66964d81fe774efb55abcc. 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/QZNWX2285073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d3bbae85b684bfeca78ecfd5efe74a504c3555dfb2648d571e0d7c91f46090. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWX2285077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601f9affc7114984c9396afb8e350d300456bb1a6355a80f3da4281406c6dfa. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZRP52252424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5934503a2dff8e0827ddf3eeb953c4405dd52bbcfe4842a9d6fd8d169e7e70. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZRP52252426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c6b204e7e373e0c9331d0fa3d09669b14b91f2337ee7b8acf9419c5dc9aaf1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP52252428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f668ea86cfb0ebb4e54d274dbe7c83818386b9ce0fb0977316dd10ee70f9cd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZRP52252430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278c9e103d8f707e8296920bb09bada138b913223a86c3a8d31391d7cb82782. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZRP52252431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c09b733934ba407df05a508bd00bab4844a95af7c57f8c9e2e2e47e7a44064b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZRP52252438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5120b8dab4b21a813f65704927c20341e4fad59b94e39b3943032b13dba50. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZTAU2259573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25949645ae66eab42c3080a654eba02dfc025bc77ee34afd935fd289c892d6f2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTAU2259577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa018b90a5900de8d213f987e379c964aa403e48511d917716b2d6996d5bf5db8. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTAU2259579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4052dcf09c1ece5ad5e946daee15ba67337561e9d23d3224b4fef6fbb2b5eb09. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZTAU2259580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aad5fab091631d582f3f6f5da113c3aca4bf5a05c912cb8ec371c42b6296a7. 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/QZTAU2259581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518319e617db79f86b2e673b206f1a67c1a3413d8acb6c2701b4ee0cfcce249a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAU2259584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a08eef057bfb0e634a155e69a875387c026b9b12a25337ae240a330831546e. 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/QZTAZ2217153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbe426a73b9e3aa342a0dfed3bfaf03f7d5174e905d591c2378567bb6e26f37. 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/QZPLS2305836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb729eb6a974f653594223393658a48c346d3c779166aac993fa3db126bcf350. 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/QZPLS2305846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94d94a0a3c1f59ec25ef307c58eca7cda078380d3e8bacb1665d601a78c098. 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/QZNWW2471300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fdc563dd6705bd4b4400e1444d4c2d94f8481c41d606f96311e44b6b54313d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWW2471302.