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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e1cafdb3453bc9ac07c5b97cb384bb8059d6b51ba153e1ddb3bbddb9531349. 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/1c816fcd-8b53-4f87-9587-88d807a92a9a.json and https://artists.proofprofile.net/proofs/artist/1c816fcd-8b53-4f87-9587-88d807a92a9a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0565a9e4c0c77847d195f54d0b34c7458e3e669fff02a22bf28fdb6fdd045f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2306062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f7fb4fb0e00d79c184af9549295a986dd89c546d543c2e547f65a9341e9ce6. 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/GB8KE2315063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a7b681d2c3e874f4e4687261f144d06b78cc8abc36e7a40217370474ea21e5. 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/GB8KE2327066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b96a8681bd957ea57fe1156a1de69ec4f36f93cd544a02752c3e9830081a9f. 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/GB8KE2406625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae9619f0cec0272ceb95a1afd921e65496e9d8dfdfa226e2cbbe4ac7de4b209. 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/GB8KE2408376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6416bf8df87fa12964558ffaef6b49cb6c99e6e489dd88450312005bad49e73a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GB8KE2412021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b9dd201f6b5f7dc72059228d5e5d88c6436f9addb8761c00feb6469563d6d. 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/GB8KE2424818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad4ec52f5817e9d1d31ce71e78072802053d92c6e384994ba626397716c03e8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GB8KE2424947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c29248ea6ce7febf69f58d70415058c7d95d1238449ff403f2196e6b4223d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USLZJ2558345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2438deb76b010bfcde948b8cb6a61f4b3818488e7d719fa0ab0ae334472f26. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GB8KE2508484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cba0141e20283efa99d4dff7ff0f1937c2917a75af00ff656375a51d86465e. 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/GB8KE2511716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d9695c583a082ee32aaeff1b05ba069a6950df1b438a461f9e655029b8a10c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GB8KE2511691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40eead345a42d139fa16ae84557dbad7f190f0b94de9c4e96c613a90abbdfa. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GB8KE2514465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b7075a83eb748bcfe5da769d16f14bd93d113702ae45aebeacc5445df54d06. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB8KE2515684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26131d12517086180644fc6d564276badd07ff4194720a5207cbc21d6e233b6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GB8KE2520661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9ec45d7a41c3608e0d76a1e880aa2766206b4c80b07d5dc1e370619bef7afa. 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/GB8KE2523905.