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 0x3a84e1ce9dbd85b66332ab64682712bea1e2e314fbcc1a8fdb80f8eec8cd3fb2. 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/e13f38d1-7b46-40cb-93d4-dcf95264de82.json and https://artists.proofprofile.net/proofs/artist/e13f38d1-7b46-40cb-93d4-dcf95264de82.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 0x33e5e25f5739c590aa2a72336e6b1ec2b82f0e5442071c62bf51f1b69af2e8e6. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCAHB2359333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe472c412ca441618631902893e7fc3fd4d77f4987858bda455547d609dc92. 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/QT2VB2491760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7798be26b25d1f2ad07db667db38b58ad8ca1774ec488a5630fd2013dc77fc. 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/TCAIU2432882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e295bf694b07aa23fb581ab1e79583e3141a93ae9a2480306e1e2f150e65f1. 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/TCAIM2497681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e1378ccff8e6e26af5c5bc645b18f4eaec59fc74441e4207f2fef7278f61f. 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/TCAIB2420444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88ee669863214131ad2dae1b2513e236a70e595213a58d6bd8419cffc9fefb. 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/SE6HN2403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e1378ccff8e6e26af5c5bc645b18f4eaec59fc74441e4207f2fef7278f61f. 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/TCAIB2420444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3af2640e10076bc2d55e2e4608d26ba7c9f39737b774c6d66dae3ba6122e5b7. 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/TCAGO2247819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384dfc8d0a9c5442ec0d1b6246e6b0fcd5af682e9f66ce262e3d616e1b68d543. 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/TCAGM2244302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7caf5e9725ba54bea656fa17fa216e645d08da326081586f7826c60cede41ae. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAGJ2247450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a580f9ed78f58a2bd8ae09b5adec816f14b54c0d9713edfc3de0aa906ad9dd. 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/TCAGI2252773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb28c8eef324887d5937ff70fa48483871f1d348e1639be94a97b63e12f6bb. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAGF2252514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb28c8eef324887d5937ff70fa48483871f1d348e1639be94a97b63e12f6bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGF2252514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d916fda71af4cd5292963618ddd49a976f26cf2ba30205078405504b08963d5. 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/SE6HN2466068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d323a5a3262bb16f00750aaff66ef69309ccc641e4166f56a3de58d5e096da0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6HN2466069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4fbe5eba62c113fa449830bfd7586443c5e8f4899f1e05014329d31f483f42. 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/SE6A92303606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb113f476468b43d44a8f7c9598fe6b99a9f0c61532a89fe7924315b3347d1e6f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SE6XW2391379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74efcc57016c45b9c42209855d1da7a6aa927f22a6bb145d475b417a9ecb988c. 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/TCAGI2261479.