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 0xbffd1d5d68609f232b90ad16ee10ea58a7f708efe5d0f4bb78344ed6bd3c73c7. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22f37751-0580-4827-a42d-2fcaddb3854c.json and https://artists.proofprofile.net/proofs/artist/22f37751-0580-4827-a42d-2fcaddb3854c.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 0x686bf8923f27d809b8a9d8d6ea35abb063184f1fedcfbbd550b1c6402b9de93b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLS2035619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd1d447123352b01f9b3632888f7ef3fb1fb8db437c409863dc12e64a4bacdc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:52:42Z), 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/QZFZ62282177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e7fb556da1b69b5688c6cf85098e504c7bfb8d86e127be3e285b93d97b7f45. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:12:13Z), 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/QZFZ62282178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d869fe1a0f0fd8539cf965cad4ab194b4d5f095df80066349e1d61a4e8340b2. 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/QZFZ62282182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64be73fdb0da4bd5c7faed1a9c4b1d74351aeb83c019571bd0660800d5a10d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USNCB2424302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31bfb7c5f1463ff9ba3113d0162442fb505afc7040998e9fe610df6e63d69e2. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USNCB2424303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e559c3411be33a7e02ed8151b095275aba42c2ce56a0e672c5c51cf9c35bb4. 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/USNCB2424304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd135ea8074bbee96ab8cccafff26ea4da93795270ac37ece814cba40d350e2e7. 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/USNCB2424305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb88ba9c0b694b645b8dbc968a06b7925c573ea76fad8d3b154dc4683ac3856. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:25:39Z), 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/USNCB2424307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c66b2d756a689825e7ccd8ee84aea7acedf11ceb7920a29d58298a6cf289caa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USNCB2424308.