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 0xb07c9779bc5d3e42f62932a5357279387132da700f5df2e867905825718aa725. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e04505b-2426-4f4c-ab55-54b2dacde949.json and https://artists.proofprofile.net/proofs/artist/5e04505b-2426-4f4c-ab55-54b2dacde949.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 0xfc0ba8551c87b7a7be3c1a701898aeaeefce81edc0da70901ef8c5e4837a6f81. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2434352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf02149aeaecda49a5128f9340fc14d2961654b0a6a9d5dc669f11bb1aa32b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZWFE2434356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b34e8debd40bd566ab857f7607e109f651c24842bcfd9bf5ba5976ffeaa9e1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZWFE2434361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b0c33922e0246ec29c6d307e90cb44c6ea220f25f8c7311113a402fbc0268. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFE2434372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88484c749e8f7663b7b6829462c11e379c8e3028717b693252a5f6aa392a84ec. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFE2434373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd795770a7f0c2ece16db93d7f11b557839b4674620607400adab92eb6a5d3bee. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFE2434374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab184b14e4374153ef7bd6a8902498dfac6edc2efcf4a3c7ec8851778817bbc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFE2434375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3ab2ccd4f8b79baa880113df53ea7485e4156cd70fbb59351dfac615eb5a77. 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/SEBGA1200817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f369ec4c1f20ba14e940aa906a42eda29fa480e3fcd0a89cac93f25cb21d346. 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/SEBGA1200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029b7ac36843e71c2c7d5a3a296d367d804de3fafcb8266ae4de987e188afa0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SEBGA1200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d950dfa6ed08fa87fdb77eb9f1b3a3776ba3a1e16f77d29e9debf3ea4c369a7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEBGA1200820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24563f6f0fbf15b66063798ae85d0b07f1c362fc5ad584ae99d44276ba448d4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/SEBGA1200821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab898aea511de267fb2c15c5819f8f1ae77a1ce5e0bf3ea03fdf2c5ba7b81a45. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEBGA1200825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481487daaa7f3e3434568f6fbe7de74807771f6c1a1135e295e696f50a048cbe. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SEBGA1200827.