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 0xc3b15736362318e506be40f587c72eed63cc9cfef23810361dd5b8b9bb88045b. 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/be02d3d2-a612-4a8d-8d73-0649014b1fbf.json and https://artists.proofprofile.net/proofs/artist/be02d3d2-a612-4a8d-8d73-0649014b1fbf.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 0xe0143a639af6c5cda5548f5ab359c1fc0c61f3ee615c5386a201eafd5d28d25d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W11711440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2729a2591a38bf01674757ddbbba170786fc1796d37232bfd2193683bbd792. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR7O51700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c1aec8a0736d937078cc947eaeafef500da92e98d3cecd1cf28459722531db. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR9W11802600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f763146eb7ee01071128ff6b7b4afb46092da76290be97d55633dbeb5f68fb. 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/FR9W11727883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad708acf6e9b6668119d909a9d7599eef3b10166de97c9a2ae54d6c57ad1b9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FR9W11727882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609fae74cf643fd7f5e29ac4b223f68382a992c99912f6fbd1e9beb15ea2f574. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/FR9W11915486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57246a96d32f238c0330202e81d08a73c8d12f6bcf8230d0f7185beea2284d. 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/FR9W11915477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacfc27f00d52c70148a0ccc3e208552eec1e676261da5daf0807dde0cdd0343. 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/FR9W11904765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ab5ec80bac860043a16db67627d06082f6d44589da8c232a1dd12257310ad. 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/FR9W11915481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c2c11292ac07218c00a3a32166f3a3de147bd4ea61dcd9b9eae26db19c2e6d. 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/FR9W11904771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98748a8fd712ae262d41136bddbfb17fb44e7a38c00a736d6258c257915a393c. 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/FR9W11915482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20781f3d55ba4179cc10e0c4d53446b40c5e110e1af9fdbeab6b4605b5d3b45. 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/FR9W11904767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd99c4876f0e57fdf81be723e2c404135398f8acd37b1a35c2e65324df42b71. 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/FR9W11915484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e0331a30d028918161960009d751d7802985669b38a4d338cf2cc9cff43ef. 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/FR9W11915478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3f30cff40a9805828512ff7069ece8b227330e4ed712f4871fc41711a88e2. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FR9W11904774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff3aeb630473af58cc5fb83f3d0a4992d5c82bd841d1afe546840577763950c. 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/FR9W11904768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81243b7d024e0b28bea34cc84b3a23cdb780423e5449abed7baffaab7b9dc9f3. 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/FR9W11915483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66481f66e5a8b72ed9cb8bbeac06ba7c25b1d543797b858d99eb82e6634eec41. 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/FR9W11915479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629825e6915b64f9f2a32fb12e0a3e144477629a6900b8b2fba83797c0ab98e7. 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/FR9W11915485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8415d2ffbc1fdc767b0a99a486fe0ebf1bf4e2ec1bbeb57c58e2b4f6f2267b27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11904778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3244f85b63de842f10d6b5229e65db7775dc28ced0e71df90245d32181a08b. 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/FR9W11904769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce1b873674c51a78b9fae25f3718d563fa42c35d9021f2ac2c8ef78075808b7. 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/FR9W11915480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e7e3d924a4d67211fb998b3d6780dd1f84996e217b65848f64044a8585e4e. 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/FR7O52000880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2b63630df7277925a5cb6382241e469fb6047f962e84555ed8680e918a728. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR7O52000850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306be484688e7a0a8781d6296ab4ded3234defb8d4e1d22125766a025e74ae6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR7O52000890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca4e5d43501c5eaee87f026d7da5436378f30474c0c54517f07c537412d0557. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRDKW2108072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0b496ccb00ae988d55d5bd5492c0f3303125bb003c537727b084f590863b91. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FRDKW2200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9720864961f5af6bf51e9c01caeb530b48fbba4ec83d09550cc043d2b6e519. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FRDKW2204670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707f490dff07d7c643d63c3d0229b01cb82fd71282b252b4fdc60cd2a037d12e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLCK42228797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5de6b2e1ea9418a715d5b6de8e576f600a8d301f2017d495c53e5c184e9016. 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/NLCK42228799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ca8b9cb7d722c01ffec9287c6ec750938e65be0a3257af5a5af7ef77489cd3. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/NLCK42228800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70618067704c31c470070835998ae5f20d49a4c8af31862db08018461411e66. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR8JL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c16c1f92b5c03afe915bb784b4d3c8f74b0d4c313dfc47421abe81e01170bf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR8JL2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2afe9ffa359909a4496a7c9eb3a5df9cc9673c0e738e82618f9057d099f68e3. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FR8JL2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0692b9e48995f1f2046a4b8840f68762394b2faa8858e9cbee692cc2c72af8bc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR8JL2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207dddf4e423ac0b871ca15f435c1eeb6bb9203478ff08291a5614c96b51f166. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR13Z2000007.