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 0x65862651f0f81fb70076e7f128d1d541fdcad155b719e5e614f24e74e3e7cb70. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d64547a-cb38-40fa-9ccd-1a2d03ad3c06.json and https://artists.proofprofile.net/proofs/artist/3d64547a-cb38-40fa-9ccd-1a2d03ad3c06.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 0x74f33a48270b48b96ba761d5f2ce7193f58610cbeed33b82d3fba11c5f4bf2b9. 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/NLQ8D2101486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708290061d41cd46d68c2b485f97a1f41a7bcf1737912f0a5921aec2c316a76c. 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/NLQ8D2101487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3138a3b90ccf2555fdd3f411d156c862a9205aed15062a94367381d2360a0a7. 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/NLQ8D2101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba6e0c0c60f47dcd32af385ce455d4586efe6674d95e41ba9d33ea95c845649. 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/NLQ8D2101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c93c9c0c6878d189025687523bdf053c80db5c12fe9ad9c0d4cd01258696858. 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/NLQ8D2101492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b34be9bac47601b2be5fd9c940c68a5c847f5c73acb9f59d5042af69b7084f. 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/NLQ8D2101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864ebc8877fa596eb1b546644201e3322c3d68c850d40ae2c4f928a1cf0fd07. 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/NLQ8D2101496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946b389b6f8d783531c0983753f5bec89c44129de0eb4a630a31afb491f5d67. 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/NLQ8D2101497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3108894e3bb1fd647f8b6f74876c28ff71862cac010a6b1f3e8d763ef5d90. 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/NLQ8D2101501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e092f30d35e9b8d70e119de441ac5349a64698c633118d2f4b6562e932a739. 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/NLQ8D2101502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347ad6d773cce0c63fadc5de5b196fcc40f7cbee066a1a599ca1b7e8db71b99. 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/QZNWQ2488565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d15f4036d5418df08f23fd510d0409d273ce258dbfd4cd16d3732069dbc7c8. 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/QZW9L2354139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa6aaabafff96d11c0359f0c2863a45dc0416ee5d1333a46803457e2173e6f5. 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/QZK6Q2132125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423be64939a0fea3edfabc81fd17336340841a23550611540bae7b676b3ceb33. 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/QZFZ42173820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4916113de27a919722e25770b441f12410be1169d4fbdbbbe750707ee891ea93. 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/NLQ8D2101310.