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 0x63bfc1ccc9f8f9a00c9b5c590b0be15bf1f0a97054d4b1481e1a0732fa72eaf2. 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/a418b5ab-de31-41d6-a2b8-221231e9f3dd.json and https://artists.proofprofile.net/proofs/artist/a418b5ab-de31-41d6-a2b8-221231e9f3dd.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 0x4c5aaed37b471f87f54e777ae85430bbdd526d1aa1ee2dd077dfc50c6315cdc0. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/FR96X2295576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558941c3f624d51e1ad48df0ecb6f7007f19c69962da37e5ed8a22a716c760b8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR96X2295754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627acf5ad4e1ef1aaad42e7b8ae9630497bcb10ab1fa91a7978042037f0fe4ce. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR96X2295573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd313a416fcceb6e597e7906e576c8e4967cb020b817b38da5b04ba76e718499. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202296117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821d10b3a004ffb4690cebb9773a0d88343926d96befbbf91471b5bf83e9107f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX202205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17242001983ae51e9d824094bd9977e5b9a4a07808a3e057df7e4b9877f62e0e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR96X2296172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdaa31629d56e337a2ff2069218a25de8b55e86319a5a7b99dc6a1f914829e7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR96X2296174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2a393679e1da787000abca0bd6886d3a094776c0f50e5bd417273a8557f61d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X2296173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf764c1f402d3ee5f3f3e15ba3b1d1ef9fa99051a4d45c55baf8c83d7c04e044. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR96X2296177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6161ea0a6ec58be80515ac68e7c92e6fffd7668ee0244b44761179916b2f95. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/FRX202297442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a916dd12858a4a19a8166263400893670c8b0b2aaa533fbe5d6ffa9690d78a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX202298199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd99aa270b9214db9d9f0f905c42b4a355eb2b536574abceee2b995a532715. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX202298198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd014f89a6f3be15f4e5aba45cb5acacfeb7dbb9d2ccc0b55ef17709b99f0e4e7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA062219221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfe5e47c83f9551f2e8ce701d03b18654c0a77557a768b4db2ad1766eda18e5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA092217351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558b3a843a0f92b41a018f5f2ffac02c2fe94901af6eda9b0bd124e847d217b0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282413911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf6767cc80c70b03d53b087885bafcc5717e781b98064375361b3af026b8e6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX282444361.
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