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 0x7a54e490d0402f5314c46f6cd98be85f487cd9e1184dd3a6285025a06da2d9b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e43a4c5-b693-4f89-83be-fe63f21d1e1c.json and https://artists.proofprofile.net/proofs/artist/8e43a4c5-b693-4f89-83be-fe63f21d1e1c.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 0x17a746cbd8e8cecb4a031bead1927f4e6fd86fae3c11d3a8eb54a07d51783338. 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/QZZ7T2403739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8076b69e7f489478572c0ad963a1746fd10bb4bab3cb476317275e3e8a901e0. 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/QT3EZ2498615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a3adf6e6e02c5b12e5e73893d20e2c7f5cdd60d08f01876b9e18f636ade9a9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWY2570060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a1f5f0e01dbfaf1bf81c76fc54523f1cfb20f9ce6dafe16beb8bf686c5fdd0. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:03Z), 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/QZNWY2570062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eea8290ec0f755e99d473cd7ecc5db721c872a246204dd4ab986b6f3a39024. 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/QZNWY2570063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc579d46bc61892f70194e5dc7fcf37b2bfe8d810278b34102a2778d519044d4. 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/QZTAT2580631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f75da3b8b182fe4c723a4b3c65fb0469d692dbecb64cabf399733b32b5d6e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:20:54Z), 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/QZTAT2580633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f98e649d31a85e59fd99310a11c5b458ea564a49009dc9cda84ccba7ad179. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:12Z), 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/QT3F62527108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130dc8e407f95e502afd6ef28c165631caac574d41cd021fbb3ca67ff14e116c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA72405048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0f5d5ca5b5a5f89b7e1b58ad93284a9385884ab2a65159912934ae9d165bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2520366.