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 0xbb96dac85cc72e1b59347ca8200d02396b4700173d14b3ce8c6fb2ac5fac58c8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3a02e3d-7f72-4187-8837-0d5f5d0e238f.json and https://artists.proofprofile.net/proofs/artist/f3a02e3d-7f72-4187-8837-0d5f5d0e238f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3e204518c6728491a9c9b02b6b9b81dc652da9c8c3da3a9134d1ddea16f8f325. 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/GX89G2356892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf9846ead8c73f42039f87200435221432bf00d0a246495881e9f212e098b3. 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/GX89G2359922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97f7cd93c36c0ca3cc47fae7f477d4390e4905b6ca25ac75489440e887d77bf. 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/GX89G2318603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3539d9b92a6b84eb2e58502f61d09c1664773004be827a03052998ade9cdcbb. 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/GX89G2366317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7cf2ec84e2f076f3702183d4068063836e0bfd58a44c68fab4b26928316996. 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/GX89G2378197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180b9ffd79246e009c692a871557565c66abcdf27138e577323fd2f22dc78ef. 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/GX89G2357260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b25d11c009c300c2ad5b9bd3a14c79062eff91d984b35524fea9b3a780125f. 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/GX89G2376105.
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 0xc36a409e3db8849b1b3c62cab4e5e8ee2c0d44f4a18c15f454c85ed3b0b22f09. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GX89G2305677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d65ecf21e06cd15654adc9813c372f6feebeef7b07334156ce5caca1eb7fb2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX89G2349404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc0340999403e0d71dbe5950e4c049a84c80f88900055b26fabf42b19a7c97. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GX89G2305887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0322577e9346dd0cf4c5f447654c6011ee30438575a375c8090f372a44878e89. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GX89G2356906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8092f2a1c647ef4b8b1e11540bcc4a4373b34da511abb2fd9b9d12712827df4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX89G2334027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758af1e0bed2a307c646defc2d386b17bbaa6091c7161d26841e2c911a58a491. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZW9N2218234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9373bd9adbfa8f5b60b8d10efde41d16b2110321be377e2729121a9162a632. 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/QZW9N2218241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeaa21108208a46c83445b030cf3cad262298b0983e3a1c9e695e00b5707ba5. 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/QZFZ42058929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf219a3946dd912d6fca28e9f86bba016d49c15afb717339ac22fabf142a4a488. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42058934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb595277ef8fc8b5844d5a17cbb024f0add999f5303ce39cb89a89c2c2f6d3881. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ42058920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de8038e221c00938834fb06d2ff0ffca92731fb65dfd7c92bc467c17f53e72. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFZ42058924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edaa0e34117ea2ec0f5f59cd5b7d766797deb0b135d9eabc9259e633757accb. 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/QZK6G2044647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2ff8d3a5fa0bc461f9b86410e6c5b90910d4a2984a06a272d0e9ea14b2da72. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:34:34Z), 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/QZHN71984370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1f1b3913fec1130fd057d22fc0bc326b78698c4ddeca0344dfbfa3539645e. 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/QZAKB2004187.