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 0xa4fdf60c0651e17083cdc0630eb436f1782288d9895f59185a213b03ed946406. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc2a65d-0d54-4e4b-ac95-828c87d63ee7.json and https://artists.proofprofile.net/proofs/artist/dfc2a65d-0d54-4e4b-ac95-828c87d63ee7.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 0xb11ce7555b970e60230cec939bbd66f25384931e0bbe4709246c4cc221226b64. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZAPG1781093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3001991f32c490f3c3228e4073e6b639dfa7f6ba7b54d73dbefd91a23814a. 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/QZAPG1781094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0508a8487d04dc07616465cb98b6f4a9e0071133874412c8d371111e9ac9d92. 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/QZAPG1781095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be0752b0ace446737390c23d17b46bec0eedeb229d83b4325a36238a9a1a71. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZAPG1781096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81001f673399dd926d5c977aab1af6ad7a393fbefb04f4303ef0243c067e594. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:07Z), 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/QZAPG1781097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb854e9f67c50f45165c198e955e3c5a687ddf5f0c3e172b90d75cbc9889fa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZAPG1781098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f7e8a069c812ae917b5f5b981a9d776090aa594594d79c1fe942f4c61b34b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:39Z), 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/QZAPG1781099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e2c0f071f1344811972f7ab07dd77eb476a78a93a257bfe0cd191f19dc8b4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZAPG1781100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb75c27b7d2a2dbf6677c0f9396f83b2b09412028fa35d737b071ed3883f05. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZAPG1781101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13576c29740ff0ca74d4f502e2fd0bb6a96741c48e4f193b5b3088a2e48015c6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:47:27Z), 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/SEYOK2316760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93718422e22bfb923470f63990290e51d900b187ad36579fa13f80e534c360. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:21Z), 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/SEYOK2316764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf3f0926d799d3241b14ed39add52b98ff6de8f950e1cc6eb0240451de67ff. 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/SEYOK2316763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909392fcb2978e9e2a614ee5c58d8aa1565ffc91cdea78feb8c0b5f9f04675b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:22Z), 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/SEYOK2316761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649f4af2ae59a49bb053d41da168250257963b910eca436ba0464a0b5e02d30e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:03:16Z), 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/SEYOK2316759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dfbbe1b650653b83752104a43136d3a555c0bf98568b02ea23b2290431c928. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SEYOK2316762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136aa08de73018cc4b4e2e0b94e8cc56301e02f9e6fdc1d9c74a6ff403f62580. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEYOK2316765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918754760867378494c8115e5507edb73b8e006ea9ba817b5aeeffdebf46d129. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:14Z), 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/SEYOK2316766.