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 0x547b97dc5a94c7f22eb1c14fde2d4bd242dea8544317b25a7fda528c9375f248. 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/c00aa208-dac3-4d1b-8c94-d88c9280ec94.json and https://artists.proofprofile.net/proofs/artist/c00aa208-dac3-4d1b-8c94-d88c9280ec94.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 0xaa58cb9d567dec788fb1588a5f12b2f8c664761720f8315db6529cfb4850f1e3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/US38Y2301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930a05a584c156095d849384a4374dbdabc53b27fadd276843c9e32abc65377. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US38Y2432961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2511198bd3e1f3b28c75e17e53384d57409fb79634fd6e19500236346dcc10. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US38Y2507104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb92b5704fadd614dd652e7958bdb4e72be09102ebb024200568d60fb87dbeb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/US38Y2539991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ee3098c5346f4668aaaf51e15e1c25003b603f972bab66e645485653710363. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:51Z), 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/US38Y2520978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f27348fb9e08e302e491f9298e7c2e726c4079b4543db942ba06368a1514b7. 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/US38Y2539992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d651fe8ad38669a60bf7abc9774564fc1e61a5cb9009a47a3dd9a1aeccb781. 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/US38Y2428083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930a05a584c156095d849384a4374dbdabc53b27fadd276843c9e32abc65377. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US38Y2432961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe986f055cfaa8439af8c683ce221a399b3f8d4dc6a75326427cd7d748e1bf14. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:38Z), 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/US38Y2539993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb63419a279be8fce209bf1f4779083a3201c218bfdc3f88a4f6bfa748a8ddc. 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/US38Y2539994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39cd314d796e9d12236ac424273cd7da026d9e09912d997fb73663e440590d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US38Y2539995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2511198bd3e1f3b28c75e17e53384d57409fb79634fd6e19500236346dcc10. 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/US38Y2507104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378dbf6dfdd726e6180fdc7b444a7e9e6b6252adf6593df26887ae7545438409. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US38Y2539996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d1e83af80cd46a5074343bbbeccc96ae4543f2279fc967576bb836084a8fb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:09Z), 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/US38Y2539997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1789c284b61a1ce0305eac2f6d06c2b49dc3fdb91990ab614205e6598784ad. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US38Y2432910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045a3b6ad16411426975124c7f39edac0a081a2d027ceba40d284bb4843f17ae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US38Y2539998.