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 0xf85dd56cbfbfc2b50bd0c862c36f55cd414403cbc47b7e69f7895dceb8c60e23. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddbaf63c-78dc-4c63-a84e-ee67c1c86eb0.json and https://artists.proofprofile.net/proofs/artist/ddbaf63c-78dc-4c63-a84e-ee67c1c86eb0.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 0xd66a6400ee155e1744f5592897758367f295fdd5e1087dfd8302483d22265879. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA052430516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a6c434e5f3e964881541fe0c0b6bf7fa3cf4f178977f1ded1aaac04ccb612. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DGA072439990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859a47fc843db30b21ccd3ae87ead87145f60126b222a1b47f7dee3308febe9. 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/FRX762449441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea32fcd91bd7c7332a35a49e981bcfcbb22526d74ec3d9388c2df3c71d6f9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX452425145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fe74496f04c050ea024c912e27c6c2cc96e572d3c27c748cb1659c5f48835. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0M2426747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f563de7a71b130887b9c92fd3a9a299b72a2eeae5f59320a09a32812b66ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR96X2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc89cd30a0b6a1b15f9329b5b8773a468ffe117452f95a107e1cd9fe548ef2e8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA052301776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc2131648c4f686876a2040b56037f795e98b579b8911ff9b0ea86ae45db50. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA0L2320657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4196705b22bcf0c13707f7446ec97a6a2eeebb587f43a93710b02bb6c1e0eb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DGA092393056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185fc104623471c4daff7876a249ff481ce25414c5907ce2357f3177b47afea. 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/DGA062307327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3df1ddd141ddde9fb01899688f64609b13f30a4e1f40d123f4a4114fcf2e7. 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/FRX282384918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa495af9874a9d65d0f9d8e639139a78a19d6274070325fab8fef802f3f48fa7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG731779591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd58b63e25393ca2bbd5d9758e270fe1c983c9c6f7af087b8aaead3c52b51710. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG731858069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cb687eadb2ce1d54f82b69f029c706437b5a30b53198dd8caf948b218071ca. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DGA072374074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac3c82c9e7cd4ff43390d5b8a39044a4fbdf1d72eb9ea13754d943f0d59134. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA072374075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77414f9ad03cd42c134c87be567c5eb56b74ce42be89d48188dc5c96b9c3a0a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA072374077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8b3e3898221c05a7ff369c08ab82928d34033e03a70459469157f1cacf19ef. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DGA072374079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd1dd6922f189fb1c1453e6791590731f7c5d3d1326d6b7d5fdb6b17bb52572. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA072374080.