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 0x30983da67c8e830cc65078f01aafae2c8084053fcbb12facb27d23ac520fc5f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5578e420-73af-40f6-8ea9-dbd42f999e83.json and https://artists.proofprofile.net/proofs/artist/5578e420-73af-40f6-8ea9-dbd42f999e83.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 0xe5a3b3dbe62d77ca6426f5e5fe05e6ebace21f3ce4afe4c84d5e74993caf6ccb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH2397079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ff887b1c3333e720f6c0aea9ac4e670239d3434ffbc16d2453c2534103339. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:35Z), 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/USCGH2397093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff024d36fde90858976e71b96466c2265b4922ced3955a8830e40f14310ec3d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:46Z), 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/USCGH2397097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bd32a3ae813f99b45cd577d7001aff1945c198e3436354be1c43485c3cd990. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGJ2302424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21584f9cea8c59066cc9857fd1d46fcc5a4af825f0d05b8049925f91136b92. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ2302429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cea699a0dc2e120caf175059e362a0a1c3b5b5d3650f8f2cf1d9d6be23b5ed. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCGJ2302433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f539bb49c61b122eec3e1c8eae91dcb29bd90635d92815aaf2219558627de. 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/GBSMU4167171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a7de4772fe4d360359269ae02776946e91a1c24c4f4847bc5764fd8cfd1293. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/GBSMU4167172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910369c1044cd6c2bb8c15940455947aa9b7e3bd3d0e51ec4579ffac38a2b3a. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/GBSMU4167174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89533b29cb020df26b8fe2220bf7f80f532057fae27e3adc44dcc47817262580. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/GBSMU4167274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6551428a4ce7200e0cd6346822314b0f636784c2bc31872fc6caac24841664. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU4167275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc613a26dbf30e50484ae87024d96aa80ccb7b16b667b2a5801b6ee7b4f71d8ab. 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/GBSMU4167276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf624fe0156fdd0b48768bd2cacc3d9af9b2e87863704d38bd7248370827dc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USHM22563407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9367febad68128950e87d6ca744f01203c6d8666a2b2dbb35bc6397af8f87d99. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM22563408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1033ee6cf6829c1003792a2e0dd5203055d8e37c788dbd7d7c6285a3b5b7284. 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/USHM22563409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ecbce35b0f1d078870ab181a5878edbe34e01c8138041c966fffdad040ec7b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22563413.