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 0xaf9f22d24abc238b2113f867cfc8bbdbf6c8210b15a9a732c32867064796ffbe. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39c741d3-8d07-4eb4-a5f4-cb4854603a53.json and https://artists.proofprofile.net/proofs/artist/39c741d3-8d07-4eb4-a5f4-cb4854603a53.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 0x8e2aa86cbafc140a1e3359b0496201a0d3adf9e4a67aff39ff2660c4b4eb8f2f. 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/DEUD92365495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd52ccd89c7829af746ac6555aaf51157463a00eca9a2c07c41b4cd0b0c07a. 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/DEUD92365496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32537f98018440f6fdf164f5b0054873255d6770b9720da42088eec6c6e2be0. 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/DEUD92365497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aab23d72da826ac750e86442d4fef3c402063d1989b05657a27a70980d87b2b. 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/DEUD92365500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848dc48656561207a151912c11bf41c281136a2690e8c9871593cce3be414e5c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEUD92365494.
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 0xf708e08a8c8455a8e52e61c69e196fe31898bb1b6b78d0e5bea7e4889f667c7f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEUD92365498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d265de4e4c3bfbc99c0e3ca1469ba75e4f0d9ef1218867a1089ea675eb79787. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEUD92365499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f897504aa1eb199cc5ce9184bb6be5e4ea3e32f83f07afc9aa5c77c680938. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEUD92365501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9f7f040355b6ff38ff44e7ded609f08d53d97b6e853ae1982524a40f5a6de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEXN82331339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7567edd01887953eddee13767d606a0babc9a06da53c9849b9b9e5f0eb74c4a5. 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/DEXN82331341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226829fb6a7782f986fb09d15c880537ada24fa5459d456559eb374a67d1ed12. 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/DEXN82331342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd836022fd97c1a80412fd1f8a75c66c2835b7470d43f9dae8c67f69445cbb50. 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/DEXN82331344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b05dbd0dd1b1775d248deec06ffbdbb53b098af85e45ced602cef20f956f95a. 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/DEXN82331338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42f9f6a8cca558dc80c9ec5bbb5df85776b7727975dcb8cd358089249182de2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEXN82331340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f1eb06ac51e4ccdc532ff89e2850cc46b670bbce8e361b005291ec5892d606. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEXN82331343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b247a243d75e70951b9cbc0c1e89d6ce631ee4cad86c6a6ce5271438f6d6f6. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEXN82331346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db9bbef65800a49e4f7263e064198c73c0818549a34b88af1c85ddf0bd9f092. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEXN82331347.