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 0xdd03e92f6aa99b9b48d175d04d061d088a585e0611984d7e76939e7d70c66235. 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/f63d8488-1bb6-4a5a-8421-0036558e97c2.json and https://artists.proofprofile.net/proofs/artist/f63d8488-1bb6-4a5a-8421-0036558e97c2.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 0xdd0ad491205664717be86fe644a5bff91fa74f011b3542eac1328a2ac5ce85cb. 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/TCABL1372089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17305f98a1f9f741b7944f6a2f0861e49425c33884725c1197966494a112e5d5. 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/TCABL1372090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57ef8f184c2cb5f594b00889b52d86ab534f79c43a2d0944bb2922aac77f27d. 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/TCABL1372093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca578390b2375f9fc368266d95cf83ed629c9c902e9fbd5a0fd459391ee33ed. 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/TCABL1372094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9e4b770565021fd68a2b448daf4ac716028da88ef9301fb7246d5d3b2b1b5. 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/TCABL1372096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81da5e4c533506d3b6dde763602f3cebc04461041629cbcccdb8fb58f6f683. 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/TCABL1372098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735bee3904270c70a4f0db35ed7cdaac820706db9907715434caa0e27f1f6ca9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCABL1372099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ed020ff2de679a2138a153cb3af02d2f2302b787f272dd0b9ee669b9abc24c. 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/TCABL1372101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20abf2f13c6c18d9f4c3e51824fe38775ca6bb9bb7d1eb81d1de230aaea1dcc. 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/TCABL1372102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb2717a01f43ce140868904b6b0d0e8069b459514f4082b0309061a28c9d74. 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/TCABL1372103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b94002dfb69c8148b0f6d26ee0e561b8af939a057d4c954e866d8dc51809d3. 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/TCABL1372106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c73f59bc89108d8cd06ac90951b15c6a5d4624a7072a1287685f4c119779d6. 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/TCABL1372109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa601c0786052e7fd4245c526d6ef5060e41acf55b457423fd123b2ca319bfa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABL1372111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320158078267699498978974c7c572dcd4ddb6e59dc8a0c1147dea01618f957. 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/TCABL1372100.
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 0x857c9305753de8cdb59015157c012895539af55c36c9925ee7e39b183dd3598a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCABL1372104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ef4726b57d98b41b3bde202ce96d7f3e80988f00b05c368ab8cde49687412. 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/USTC80988746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fadca126abf839bef5b6674d7b6d6447244801cf61d3be74f4b732ba1c46fa. 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/USTC80988748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fa9010cbed05bcce047568bc1133d4e64b0228e5dad438df1ec300d394bc1a. 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/USTC80988770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd734939d2157c5e556232f87b4db285026cb6ef9685deca5d9e4cc927bc1480e. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USTC80988772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2f72743d35b0d5b185d2c9af54c24ca5b0f6187e9b70d84b58c2797131b87. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USTC80988773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c06ef8b07ba642a5819b937be59a7f22ff53eb91fb36179999ef873ec672aeb. 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/USTC80988774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f641d95f85c1b1d3e02481f222690fd80734264cc01763d15da6feb92dde0d. 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/USTC80988778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874f36da4d3dfdd04ce6ae09eb70587d2ae6f506cc067538ce3ca4a54ba97f0d. 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/USTC80988779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20724bbe6d34dedfcc11c7472ec51c5af48e464067b192dfc75f59067ff4c4e0. 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/USTC80988780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d79dec664b66fb48091f826339502a720efdbdf96726223835a1ec167ce12d2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USTC80988782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ddb239406a13cc8d1d7139770adf3d01ed1d1355a74db84c25cd21939aafd. 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/USTC80988740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d495206e50cce3223c319fb40a72d808697a90fd00627f87eeb608c1c22592. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USTC80988776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beea2f6523762329a0c12c427129e508344080e31804b10d274188f906313f9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USTC80988777.