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 0x4e99cc9f6c91f3c450547d89cf76adcbbc11c0d27cb0afb1285419159c2e91bb. 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/a7018399-aa10-4f04-961c-ea398c55ee0b.json and https://artists.proofprofile.net/proofs/artist/a7018399-aa10-4f04-961c-ea398c55ee0b.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 0xaeb70a99a9900dae3527fba70132070a3fb9a6a232eeede0a533277cdcbe1edd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLA552300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8410d57febd7c93df7cbc88a7d814b7d3ce3a49e49b58b335c09da4ed75d9. 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/PLA552400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840797ca7ea1fd8ae40099e3ce7408385d70b4931069bd3e6b586215399e833b. 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/PLA552400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb70a99a9900dae3527fba70132070a3fb9a6a232eeede0a533277cdcbe1edd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLA552300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e7b8a35b10c401f98022218e3670fb168d954110e63a020fa5b877283b7bfe. 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/QZNWY2133035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7cd84d1efb2fe18daa3e2450fb997171d9ed9096e2f1385fa5631d516ca9ef. 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/PLC062228704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1817e1811137d373d7dfece99de66559207bcec1be8a7da4a81da4c8d4860c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/PLC062227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50be5ed3ec7a8878069359a73f487a58514580144c5928f1fc1d4236a651d4b. 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/PLC062228708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2f1520c6b7f7d077fc286dc4f2988ffe4a888618f2372fce62e26d6fa4709. 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/PLC062228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39140443f50abf58c6083c57a5c15b40dd562aecb429ca9b63e1126c20e70ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062228712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb90469b29f16e351c96d360b84c12661e649f3718193a2e276b2e19e2f59d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a78224d5ebd21b3950d5e47285cd21dd7f595fac595a9b4f2030b137d48a8a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLC062228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf643ad59609264105bd4876002ee0ee64a39eca691cc379ea582ccaa09c431e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062228715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50a6da4ae5fb2e9c6b14f700ecd96e2901d249ddef7ca4871c47c93445aeac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062228716.