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 0x961d5b2cfb784bdee5847e893fdf010d13413fd11ce27d8f15f38382c0b0333a. 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/e1a09f35-6e86-4eaa-b977-b42e782d4a5f.json and https://artists.proofprofile.net/proofs/artist/e1a09f35-6e86-4eaa-b977-b42e782d4a5f.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 0x41110961289871856ae2a06564805ec1be8ecc4b6f5def6e7b8ddead1f718996. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USLZJ2007816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee41f6bad907547354e644ac1ff1ff03b9c2033553909479be7d285aab12c191. 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/USLZJ2034593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c506fa5e4daea5f27627db798dec5b78d3dffd3692e05a8fd64c40332b58dfd. 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/GBRKQ2028674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cfb4088073c7d35ba6426168ccb87cb8f9b8891455df07f6f9b0383409966f. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZTRX2338922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f996c514bb9e324b27a8f92ba5616b4b547ef2ce01acaa1c50689594cf4e674. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBRKQ2309331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d95f1f45322ff42d83ad01ad675bb4e3a21982059257404753b3eea5e98f6a3. 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/GBRKQ2309334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a78050f064426425603b61de534d571661d398d0e1c8a66f8a78db83694bc96. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBRKQ2309335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0c6471e41c43a4bd49eaa895a7d3c830a0f8fdd6fd1b4a5f3ae7de82274b1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBRKQ2309360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d31dcbe69a46aa5dc84c5b9a4d7cc5909e3b85fbce600af946a196c64d012. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBRKQ2309364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd270ac26ccdc917dbdffa54a0db3063148207e9578c49bf82ec14b1c073af885. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBRKQ2309388.
In The House We Built of Pearls (The Selected Demos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ed153a7b63a11546bbcb5577c1161dd9187d6e948a51ae1b1dca6a3c4de571. 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/QZWDD2323474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379ede809d5a9e95a7d6780964765a137f39352dab5f88dc567265ad8043c16e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWDD2323477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0addb41e08250a79202c4a829170dfe3f9ab4e5c5ae04254935824546895681f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWDD2323486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46656ec922f99cec46a7022ca2bb32a89741af83ed48287bd394b121d35d63d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWDD2323493.
In The House We Built of Pearls (Side B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3037c0e255ade0430816eee215f9ab212cf439c2a466a5d48724049214090e2. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZZ8B2364102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3897fc207d845561353f325a5032f5cfa08af5442b348e2d359afb804c41e363. 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/QZZ8A2410660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c1b5c7847331fa57ff53c65e2ea315b1678adfd485ed202bcbb5edbfee0523. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ8A2410662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dc2a82b123dcb6c70f39271451e84cce13a2e1a4494c5e828bf1cf1d9c27fb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ8A2410666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cc186016bc4241ea5ff541e0917dfeeec4a1e08d8b03af5763e656012307cf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ8A2410668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa54a0a9b0e3ecbab25db412ff01092c632542df0efdc068dc7a6cc55cb130d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZZ8A2410672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1adc73a850418bc486ac52ca8605cfc6b3e24f764c57832dbbc7e8f4ed8a23. 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/QZZ8A2410677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701bda041929b808fa5da73788402c3194fbfc20122d4cfe1013fc783be299f6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ8A2410679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30286e028983e0d3efd00b281dd85a1ec35794ca15b3fe437b4ee4ae1fba9d4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZZ8A2410683.