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 0x9a8599ce01262b5f5fa9a7d28f3a6da621b6a34dad0d054faf7f116ee21aca75. 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/022a6eea-5b0e-4338-a46d-dd2d8e9f98c6.json and https://artists.proofprofile.net/proofs/artist/022a6eea-5b0e-4338-a46d-dd2d8e9f98c6.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 0x38bcb4cbe0ef3821791588c5179534343a3f8027312bee763169990ce9b59554. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2394939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dece15857222f4f36359eb220e8ea5e64d83476283382022a1b13d5edbb70d5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX202304243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c61936db0b027b7f99d80c9bd4eb8f3db2ad391ad4bd596f46d0beb34b42a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202304245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c054f9c4cccf266c61fdc6de97a21745c0865ab48c89e88b401d34d6444b66d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHW2446896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ee679636f2c5ce57a2750fcd4e213b75fee9b24760970758919ba7bf19befd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHW2446936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176af40bb245eb079999aaa9d3a217e23805b2e486c66f4f2088577d1aaa4fd6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHW2447016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38741353541743b970e6fdef970cc7cac0798f7796271cac0df54ef79a675fbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHW2447079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe2982196483e64b7821a063637fdb635932cf87c1e0417500fcaf214a44b9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHW2447248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4913efacee81e697979802067fb9dc777e94d1e0ae32a27cba6141e45dba28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGL2230298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa02cbc7121def8d6b65f28484d6c5556707488237650172c4a3c72effcf0d41. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGL2230308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fdd311c51c768c99d259cf1955b245c5fd27c9ea50f8b3ec1aff832154287f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42260031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41f8fc0c47cf2d5555e0fd98b4f99c11ea0eaa0d27b918ef55f962dc3ec5f6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42260032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54657b4737ac4449ab7f03ed3ef3328cab64ea8c098bf702e2f6e902f0881258. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42260033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a0daf402af707cf0dafb54a289f1c898cfb32e8496b7c23170b11e38ef023. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42260034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b09e2ef2f82a4a4550e390b08bb3326d019e86ff70aee83c7dc76fd7cc84ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFY2176280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80734b22592eedd36a3a3aa1ab7d99263309efd631b89938beafa71b7674da6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX282150936.