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 0x3a56cd8c0255e4b5b789663bb73e17ce71b49232be9348eef4962a67f955b300. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e727b6e-623b-42e8-8f87-0eee112a538b.json and https://artists.proofprofile.net/proofs/artist/7e727b6e-623b-42e8-8f87-0eee112a538b.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 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 0x5265fecdd9a37cbb9caa9abf9542bc030f3b5bbdd10ab09333845943212e69c8. 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/JPS102300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b60b70a84522512c613cb1053e041fe89f369533f84cc0f9c67a908d601923. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPCO06700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e0f47e5c9f0f214d8cc7a10762f1a45a75ca163822c11498a6e468beaa2a9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPCO01433030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733b0c2a7bb8e99bab067ea9598ede35c2807bce518c2e2e1cc9e629af7947a. 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/JPCO01126420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc7f5da79cbf71303576f07755b74e4722165bdecf8e5ed7ee64b3a31f1a2b5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPCO06600100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27127cfd677ac188d4729f3e0ca86fe10edfa244ad08df7a390d435e33570b92. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPCO08312710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb2834ae67f708bba807586b9f04b0669bd785c92788297d0374f00794dbcab. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/JPCO08196970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7bb82a14da5a04ecf128321146f021af49ff9e9285d4ec51705976d0449409. 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/JPCO06600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82795e6d3c7c5321dd71d72f9c3586c55c0cc795019b4ca516cc59dd1e874c. 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/JPCO08318130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ca1c59cc89e24cc410735c96451464e747c5f1d68e06853c934ba7e116a0a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/JPCO08196980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544754c51fa5c28e57ee87b111cdc1e59bdeb5f008f99048413946d00141bb29. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPCO08312720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed211e184571a8212ec4ba019c3eb0093e30e19eb96a0e05a95c1887b5f3544. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPCO08778500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1418246e95dee0ed8b558d4554dc6006ee0c0a83748634410029526a51c152. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPCO08778510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257d671f32076395159633c6a6ef109d9f2d6a20b4e79488dd21a7f0fecfdc9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPTO00300983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ad17246d93380c3ed95e75a354eada92cb432e04fc0d51087ca2a39562e730. 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/JPCO08808520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ee660b669356c47a04a0b5e2081981ea145c122828cd8273b4873404dd655. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPCO08825080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555407e1b5d58d6496202a967a2f19b3fe35bb5fd2bef39a8465ec385849bd05. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPCO07101710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c39f2049023cb77f65241fffb07da43516c7111f728f2932b33b43c63be42. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPCO07101720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d80acba3fbfd6689ea315277851b7e6670243d36d9004c6c8ce2dec1eb5573. 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/JPCO08529410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626571a9ef4596a2e5078c80a101360e75b3838aa0bd5b83cef01f1d7840318b. 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/JPCO08607220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40169c6b6b2b222f8be306b1561a777939bec458bf9978f3fddd029283619fc4. 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/JPCO08607240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52d8d71c53291b1f6733010d70c6bb9975c5cd43c102de7dbd486eae24bcf71. 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/JPCO08501680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefed8dba82d897ba30fe30458a66478364ef0952524d455115083044b0780934. 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/JPCO09360640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81041c4232d57cfbe9c5f94e6bed34b6e288fcbe95d6ee3a804e5cf22ea40337. 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/JPCO07202680.