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 0xea030f3096e382ef0c58366a7915d35218332f46ab9a87e69faa17935eb26384. 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/193976e4-7bb8-4c1a-8415-8d243cd68a94.json and https://artists.proofprofile.net/proofs/artist/193976e4-7bb8-4c1a-8415-8d243cd68a94.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 0x2a14a3884b101f263957042fd94d1a401d9fdf83d4afd6fa0c2b08a1094087b0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CLMI21400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889d1492e539d20ac8959ea703b416b715382aef94b3c5c0ad240843e97b0e5f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CLMI21400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387548ec324ea2902d327b427b6e193cff5d909eb4aa337d945e0fc5cc02190. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CLMI21400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825c7a0fa2f1da51aa26b009713a8aa794d4f4378c58f925b9e6c33327826010. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CLMI21400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1ee607c7c98c9faec7f3cffe7d0b7acf8367b69fb93ca31fe58135676540f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CLMI21400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6260a08e88aa3bc0e6f07bcc767c758ffc7f2f42214710d05e239f26c11ec0a2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CLMI21400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67d838ba3c14af9029a11228fb92bcae395d1d6e126e8a27dcd4cae807eb560. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CLMI21400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ac847207fbd5103d5de93a6bddccd62b6068da9a762f53c9d68600f8c36595. 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/CLMI21400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f94a3e3ccf30be42ca5fef178684680eb7e428f5bd6528d377ba3548171074. 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/CLMI21700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd33b909160acdc8d731aa037cd6d506a4ab5cfdfe30da338be11ad0d4ce168. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CLMI21700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f0cbd301564b6a3a67070f8afd6d7a10c4c0f985d187773b9cb72a1e31c5d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CLMI21700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3fe9234170f4fb56ed84fd47dada07b022c5d390760200f4ce5db59903b608. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CLMI21700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211ab99e1024c12855115a4963ec44726fb3cfd8e2b349cf8db0bda357a9951. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CLMI21700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eef61be6f40e8c855d34dbf278c3362c85d0a70e77f686d14a01d2c5feb164. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CLMI21700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812a36256a24ef69feccc24d7cc7572de79c39bb9a90484f099d30334b8e1f1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CLMI21700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7398f9a95e2295dc03bbe2c4e56f1b4cfb3dccad0bee6c584b00e77475119e5e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/CLMI21700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18ea5f1c6c0a17a9426c50fdb361c4ed8ceac7b34a9612684661eb667e3ce40. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USCGJ2245706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e43de9141415cd33081009ff9172125abec7d50da2a3fb0e02a645db9e5df. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CLMH22200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0385536d3042e5046ee191c31c793bc242523adc14eaef1ee040a44de3ad083. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CLMH22200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be56b3607f0944af015b87fce86afa2becdea3815f7078e38c3c22fa9b45644. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CLMH22200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84101090f7ccbf54f735f94f2498b9b803e661a11869a029b0a7a9674e69e29. 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/CLMH22200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0654085a313229a2b4309639be600cf14e5eb855a57091f3f0baf00e5bf1b0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CLMH22200020.