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 0x7def0e4351f2b4cc4875298d5155cbca177c8a9372b1610480a9fe1f62e226ee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/923ca240-e27c-4895-85a6-370c3c5b13e6.json and https://artists.proofprofile.net/proofs/artist/923ca240-e27c-4895-85a6-370c3c5b13e6.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 0xb0e3fb4267dff15691bddd57c9d318ba876050c7de0471690bd3b0a40cc34b50. 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/CNA231803163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda73b2bdb911516a9c0d3c2a9a3d4a176bc150b807a06eca90dc7e9c3cc5a4c9. 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/CNA231803164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50aabb4c683ea83eede9e3937883e86b2deb81b203864b12b632eebf59ddcf9. 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/CNA231803165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30fb526273ac26dcb1be53c31e0de8bf1214425671c56d213a72021cbf15ff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNA231803166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca6168d3eb423b284ce8621ed473bc310b4dab53ec50651f504081472d19fdc. 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/CNA231803167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab57ce95376b02974bca98493d8d9311302d7b2461c862c6e2581c3a6443187. 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/CNA231803168.
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 0x533b1a2d7702c33976231c784b743591cf270ee043a741bd2b42f33269933ef4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CNA231803169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e937c9ae236c4dfdad3c19c988e555993909550723d9c49c56bb4489278c9. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CNA231803170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664744dd739e0819278be95206af0d46da5267b0779cd7fcf182aa85ee546631. 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/CNA231803171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02be93b4b0e4fc025b0763502c47ce801825750fdfb8351e3596f28b0605a95. 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/CNA231803172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d76a8d083842d266e82c24c681d6927afa909b4acbf63ea4042a57653bc141. 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/CNA231400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de0acf4ed282e6670e2e119611af0bc92e021cc500d8cf0dfe71cd83d20a3ad. 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/CNA231400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9942435f5a1e4effbc9c2caabecd8b1206a3e7aa3d3233082a2b4443a188667e. 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/CNA231400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae11b3a52c959736c1ed9d3a9402dd10213e08265dc102aa927a244b7a42952f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNA231400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55d8f96e2ee26504883c99b1bcaca92462d135a3940261a4dd32d5a59b3974. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CNA231400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48099aa35ad7e2fce10c66a8fd6136a623197a1ca9399d12fa416a1ebd5e89b1. 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/CNA231400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4970b004122426e918d92432cd3625aa527a854c8288cc93f292d8f78907d. 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/CNA231400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc212986aa851fd3766d433c83afa9f2d88b5c2533d69193348199c1143bfcbc4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CNA231400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018782d67a6779c99d4e96ff086217403e3164d90728e2da891856ea4afabdb5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CNA231400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aeddf1c36e6b19c7bdb92e1e5cc371d5284cc3700c1fe19982d14f0327bd0a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNA231400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea747bab8a0a3678a606b9953c83f5fd70f3483b72e4fcdcdb9418dc27c160. 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/CNA231202100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e76c994dd82036e58c9ed5b16eb563ac968218d6e71b01886c6d3901711fd. 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/CNA231202101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94667dd175d97a96829bb9949629c26068fc1826d70b76b55945d7755152fa2b. 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/CNA231202105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c8c97e280e527c7d8e9fba9cf1859e36e8b1972f720ece5575fa6cc2314bde. 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/CNA231202106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393cdf2e4ba491ab25a57b23189290ff92ad84eb0c416cd94ed6b5905db7132. 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/CNA231202107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9831653ecb852c4bcc74cbb2750c4af3b4ac9e96b53718b84fe2cbff78d17e9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNA231202108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fffa9bc10ed6805f42aa9e3a69fe7c181cceb593a49a507746584a3d0062a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNA231202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed86a249582f6f720f1312f09f5548e4a689a191789c2acf8a8e23f88d75c5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNA231202103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b3ed8ebb8c2195b91bd82e2391f353f5277fec07cdf909218ab27a68a1176. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CNA231202104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd089e354ca1918a3f37f43d024f5a33bbcd5e33c80dfc521d05aee379eacd51. 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/HKG732317946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af0da663c2144a032ba5c7dcd5ba188f643a31bc42f47f2317a92fa37771bfd. 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/CNA231202504.