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 0xf12158ac638e1ca413409fc69de5505b2079362757f7eda8329a71be61e6f6f5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20a2cdfa-f1e7-46f8-9fb9-5c6e3569def4.json and https://artists.proofprofile.net/proofs/artist/20a2cdfa-f1e7-46f8-9fb9-5c6e3569def4.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 0x15437a018af54265186e3b236944a55fba925b7be68837561873b334a95e1de4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:47:51Z), 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/TCAHO2375157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510938ae7bdfc22630535007339fdbf391da5f690e6a1ddd418cb5f72c52f910. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:54:54Z), 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/TCAHP2318563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a4ea15332be5b17971a6ea963cdf85e80fb3a6dd4f3755fff98326aa4b7487. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAHQ2320338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ee429d0e6c75fab6e78441f93d5b1272af35e5e78d9c961775730af00aa12. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHQ2307920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107cb705d3a7035e73dc3d0955c746c0e5091046b630e2ebde19aba063fe2cd6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:10Z), 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/TCAIC2454382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b5dd0e987ee985a62353e0a82d701203b4e5ad74d911be4864d86859d7f257. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIE2453970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe156458f57c89f446225521d31afc8e6a154aa2c4c00882e91c94197ddd04554. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAIG2422417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1408691edafd476be4a126f386d2bb8604f5837bf0a7a0de5cddd4dd7cd17ecc. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCAII2436340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a3ab7bf96cc93ca35ada48915b28891abd004bddc540f55e11642865541365. 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/TCAIM2414392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab850e44192f3a4e369dba1abc1e1c45bcb014b2b25d1b5f1a5fd4e6d797885. 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/TCAIV2454002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade3d37fa2305e3c0750c055707f664ee1ca0df50b4b9e96b1092faf23ab461. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJJ2521766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb62033ce33cc575fb43f3948d7f44e6d149186c3dd4bcaf2eeedf28fea3279d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJN2546715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e205778e4e5af83a90a2420bbf55f3911fc7add2e321bd4d7c88f6d21aaef8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAJM2541652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3fd09cce1a2d4c0c87573975af1c933d0bec4108f66aee2a8c9f305ed3391c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAJU2599805.