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 0x3c982acc612ce93a9b726b6a1eacd0f9ee9863f1a8cfc13570d8f435baf40d8b. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e96ed104-e01b-4afe-9c13-3b3f03414740.json and https://artists.proofprofile.net/proofs/artist/e96ed104-e01b-4afe-9c13-3b3f03414740.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 0x4525fa7ea2a348aae3278d70858c1f15b2d9c71a0aa4100c6ee3da029e53a33a. 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/US25X2105738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1063d75718c24e230950c2226a839ded587e8f848ea35269325b68140b949210. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US25X2105739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d9292a5b77c0875778775ce4798ffc54f5beadbf652e3ab074eeccc4df2bc3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US25X2105740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fcc542a903a5dc9cd93b60ef7d6b468097c565e62b2a9ec01283a4752e899e. 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/US25X2105741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389224560cb99369c26c771c7794a4c1ef25032a2c6ed4047472b0729e02a93b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/US25X2105742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dfecd1db116a85011a40cf8c39bec5e88aeefffb042004aedfeee8910dac82. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/US25X2105743.
Anna (Kelvin T, Teya Logos & DJ Ditto Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28ef99ada285a40d564d5196220a98d9905b292e1ffb5856cf2931caf7c9a5. 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/US25X2105744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ea1f96af32552a9a8fd3568ea1f94ce624ecc1431af245126793819931068. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US25X2105746.
竇 (The Private Rooms Remixes) (feat. cehryl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a546d619f2830f52372657d58780380a71f2cbd5c8c27f2fce1ce7aaf2b48f1. 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/QZTAT2460691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5573dff248634d5a3fce854cdf32ae7873d5685c1a359bea5af5f0d3c85f13af. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTAT2460692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3497ac5216a991a25a91bb9abf74fe9ee21c4d4210b7565134bd63ba67193e. 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/QZTAT2460695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4444b8f5249ab87e1b1c0d0c25464d48108a27e857f435607900c611056c2fd. 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/QZMEN2472190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa069063f92a6f98f0e503084ebcffda4a5a1bfa04e7c4e887f0432de04f46754. 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/QM6N22259303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad0a246185a2d6cc9765742619983a94e903baa26241d9bff73ec9aba49f58. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRX872108497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449537ef5f1bd82f79c423ad1eda3e40aad02f3ccf10d920d63045a391cb8d2e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX872108498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955996bd1f991e9f792de2ae91610324834aea185dfcabf05b06c9bd344eb485. 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/FRX872108499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360517e5d92c4f73eac8581056fe345b9564e28b90f037376164b6abfeecf800. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX872108500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cf53312a53827ba1bbbe5cc196703008e4f1db4214ad1287cde1a48a013ea3. 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/QZTB72359049.