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 0x1d8632b713bfc5b3b9a7aa11a756f5dd07035f7d6192d116477a8743ccb775af. 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/bb415eb5-83c3-4d3c-9fae-a0fb4b3a5639.json and https://artists.proofprofile.net/proofs/artist/bb415eb5-83c3-4d3c-9fae-a0fb4b3a5639.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 0x0fac38b2210cc605b743bbc28b3bd45ae0d9b08f7d0243218a19ad3e845e3302. 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/HUB281206628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518c3234e10fef59ac805ac5bc451e0d045ca9f242f7cc13827c243b544c14f1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUB281206630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe818e590e7c6390b5598cf99434d5cce4975fc2db20b784f594b7abc40d6e9ba. 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/HUB281206632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1b6f9b3d5d1ab2948f480aca70033fa49aae7010a1b73fec04e4ff94a0e60. 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/HUB281206633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbb0fc998ae052bf32e5c32cdc34f43ff544e01598fe7ca302662dd6c184c4d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/HUB281206634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653c2baeef2bbb4f7ba6e47a8e6bcefe9f1cc1e9489ab93d843341c247552592. 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/HUB281206636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd79546ab313b24ea2c6ec5dabc77983192d9eaf64b963f638a676363df3dd8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/HUB281206637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0f4ce0d223acd3a992ac07500d08b7a3a6cd21eebc613f5b76ab7cd4d1602. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:15Z), 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/HUB281206640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e3f8a7ca06f6323e4eed204a3255ef711cfdc121203c05cc21e8c64b1a97d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUB281206643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2111445362db1b8952a0ea055b9341b09b8b525ecce4ad6566901fb10ec39. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:15Z), 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/HUA611600430.