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 0x1ad77d8491fc706e9f84919b7074a5375f0bc0751f573980c393d5b36ccea536. 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/22ce82ce-e2de-4ea7-bd1a-32f5915b281f.json and https://artists.proofprofile.net/proofs/artist/22ce82ce-e2de-4ea7-bd1a-32f5915b281f.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 0x3c7b26c5b3ac9ecf2273f976047c077735af43952b3c793a7156d25984dc90eb. 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/RUAGT2418791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd016124bbb950c01a0876e112815596beed01f15c0f54558e21036c3f8cb9928. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKR6V2441033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6306811929115a2cf8d9bfdf0a3c214a0e188c210726d49ab0b7ded41b246cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ542400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d39b8f19c28e6c341009acab4db29a1e5e0cb7e04fca365f9eb5866f937a7. 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/UKR6V2440370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acc9a8b7bc46483dd010542b1fd783c7a18fbacd71b01e2b9ae6525a9756103. 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/UKR6V2343294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675f3065b12e1b7ef157561a946bba922b7aa4b8d4026644ca574b3fef1fbfc2. 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/UKR6V2343295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da2744e8f1dec8ad626496867eacf9733aabc506d6d3ac9c16ca7259a3e1360. 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/RUAGT2338004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255c98779efa625609769c61216563bd2fe8fcfbcaa5e9ac6e090c9e518f90d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/RUA1D2386592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c934d959ffcb1ab7c505891331afa4f530c84ad05f07a63dbbe282391fa972f. 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/RUA1D2339742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86624afe717f9c58d2e203e8221810be0f27d6c3663a1f8e2940947afade44de. 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/RUA1D2321799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae8917e43637c5afa806c8b128c2ffed7765c3d1326302810f5db55e07024b. 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/RUA1D2307656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6889c350b2a8deb19bc21153049d83b708e1c365a62890ed8f2ee1fcaf2b0717. 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/RUAGT2203211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5f022eac0f1637204742ea96a46897400cb30221e923546c50d3e24e8b0fe. 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/RUAGT2200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77441784096f79845c204b83fa2e2cf1df6cf7dab307b3fc8902cf219f59db9. 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/UKU932272961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d317a300d0e9ed6311491040663ed43d12d85139fcd7ff06e1be4a28a08c91. 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/RUA1D2280962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576d8a3803a04fbe48986350a5a9e87d2380fa1e2bb65a30b288b5e7d7baecd6. 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/RUA1D2268070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4292db4752a01a76e553158b91a85db37416a2584bfb3e35e61f623b8b02d. 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/RUA1D2253671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aab12d58064b44f38bb8b74d8bd95ebc4f93eff5b741e68857ee3bd6768690. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/RUA1D2253672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a835622b2b2bfd0cc216d1c60a2eebef638c32174d5ea17654c7c7c5f6980a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5FN2207947.
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