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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 0x7b5b37d7c7c1a6ecbf64e90b6ff57c21cef9be9318d505f5c5fe8f1d5cd5ec88. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca0c4998-d604-4ff0-bf27-5e933054005d.json and https://artists.proofprofile.net/proofs/artist/ca0c4998-d604-4ff0-bf27-5e933054005d.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 0xfc822ec17009134f80d73af8033712f9b1595302cc0765662a00a230cc718f01. 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/CZUM72400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342ec31306770901f74dfc1d7a92ea5b0aadedba7111d42e7de7e524e7458a8a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZUM72400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ab929e7cf1b07cea26d108f95e576e18fb360bac4b5caa61e730093feb4a3. 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/CZUM72400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278a7883a4617d5b895748aa183337a197cd031ee8dcc6ef6933fd2af2ddbcf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZUM72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5d26a4eb84db0b68f44d90a8372def1765e4ce953792f563c1fa14f4a88553. 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/CZUM72400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aca70148f589e5d60d5d146e1731eb0266804ba42bb9d4495e7e42b8a6fd2e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882228259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a352b1930d0d6b4e6edf1f82eda5df9e9527988be19aad50c936f74562ebb. 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/QZN882228263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6a9a428c1adef1ee90677aab66da720eb207494aadddea947083e4735d6481. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZN882228264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5bece06e58017d9f9d6a846323d25a0413a75ba391301c5dabbe051df1e7e. 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/TCAHT2482070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342ec31306770901f74dfc1d7a92ea5b0aadedba7111d42e7de7e524e7458a8a. 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/CZUM72400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278a7883a4617d5b895748aa183337a197cd031ee8dcc6ef6933fd2af2ddbcf. 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/CZUM72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f2e92c257a2da1712d91df17b66f6cf9b4587ea2d3db76bca0122541d34ad. 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/QZWDW2228688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8390dc0b96a3aefc28731fa1f76a74faf87c76d5e988c92b3eb4e0404422a6f5. 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/QZN882262665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aca70148f589e5d60d5d146e1731eb0266804ba42bb9d4495e7e42b8a6fd2e. 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/QZN882228259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c378aa4fafb99b51789bff7aefa7febd64f3201cc7e3dba182c5f5f28cb0ef. 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/QZN882162631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de7b3b45bf9746bab1dfdad1ec1476f40ea844eb8ff06065d5d2d0e601f68a3. 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/QZN882150087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a9d5e8f4b035c3457083902906d38da12eff793f38e362546c679534462a4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZPLR2222383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23821683dec7ab4ed427312fffb0846e58d38311ed0d0e8ef5a866df48cd3a. 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/QZPLR2222386.