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 0xaeca7f1f14dc8ae59f6adffdadafbafdf60566018149531d13031e929f9041f4. 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/30bf8712-920d-4cf6-82ad-d64121b10b34.json and https://artists.proofprofile.net/proofs/artist/30bf8712-920d-4cf6-82ad-d64121b10b34.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 0x6b1942bf2abda00968ce706d391eb0fdd63d61ff27cf657f3c857a37df062ccc. 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/USHR20307004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298006d9583b92cfe2497f18948f8305b65ed6604c2b7a204f0c70b97b70d577. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHR20307006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccad49029a13a29480b78e712742d01635d35fe9bccaa8101bd93c14fecbfb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHR20307009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97871d95670b7bb81206c9d70234d36911b9a811a7ecb128edd678a208ae2f97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHR20307024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08376dccc4b2c87844cbf4c90116a88c6a3f8c80c4cfbc6e73e2d2b6449577c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USHR20307034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb5765f77952e3cb99b588e288a29ddf3c5e24a66a9ca1bc9d067b9e0e2f0e. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/USHR20307044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef662c41524bd34cf81151af84eddb1dd3c2bdce572c607169e4b8a5f01ded. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USHR20307047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd113101fe99a6b6dd26f4eb49d4b4ff5f99a76dbba264835ab48076d0c637f. 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/USHR20307103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75bcf200092c94993abaf7b39481acf11931491d75773c31e72a862b21a62d2. 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/USHR20307117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db7407f1fbdb50cf6e31d7d2f9bb239e43417257fbd98a18a2ed5be7daa3a75. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USQY51603284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b660e45551692b99bbf26c94a9b965c11d260977e5da2baa36ff4eba769b58. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USQY51603287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f862266290b19f7e37921ef5f211af4ed5c864eda5721e1ec308a9262cd68b2. 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/US4ZV1010117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6bf4a24aed5e7131d315ab9fae08b5d18e21b222fc33b6288421e1614254d9. 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/USHR20307101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb5765f77952e3cb99b588e288a29ddf3c5e24a66a9ca1bc9d067b9e0e2f0e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHR20307044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747ade7f615018a683b610062a6601fe19e12860e4fa531a43969dfbed9773a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHR20307109.