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 0x95f2413e3a7375edece79b59ba7e40e5ab1ab602fd9ac3ea7962f4257077dbe1. 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/57146750-7a12-4144-ba55-db91bbd4bbbe.json and https://artists.proofprofile.net/proofs/artist/57146750-7a12-4144-ba55-db91bbd4bbbe.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 0x6cdf3d3dac97bc228c1af6b0ad474b48f081f263e038a98f11abcd1367bf91d3. 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/USANG2069242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f581321b21af2d4ddeaf2feb9d1338072599afbead95e534e0672a5f283051. 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/US3DF2000823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146dea11b0c226beb0942857434641419d085ab282c005ba07a7553e508a807. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:00:46Z), 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/USANG2182579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd6a36a81c4008fc720ba9c6a9092e32398dc9794a5dd57849a72cd4211573. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USANG2179419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c3c8d7f9b60dabbe6af83e5be103d76d69c0d8b20cad88923734e05b10e77. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USANG2412569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c7f5303eed0f0c492a7b1b0da1aa458b5cb48ce0b0ef1764c2b8b8dc8e7864. 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/USANG2473390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941db7999180e0a99a4ade5d4aa6b1cb31fa1010f2dad63365ee6ab3866a0483. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM3DF2404620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b68c7d719d033fb7e9eb6a48fc93afe6fb40794d6fae5b42786d9b0f4206bf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM3DF2404719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721677a23818450ab6cb06519194a926cb4ca81d9b7fafa5ea4864b2f55466c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:39Z), 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/QM3DF2404722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccab164e405c502583ed750e22821f79a4bbdded5ee9bacc6aab377939b0a47. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM3DF2404724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0930f938eacb6121ef9afdd55eb80722bcc75414cd5faa0908e3060ff4fb077c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM3DF2404725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2394076a3c3d98ff07d80046acc5b3081cc2554dc5beb8d2bf3c869e7f651c2. 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/US3DF2545927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038c8c9452820514dcb8b49912d622047bfa41f79280a05001e4726c592e254. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF2545929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551e01c0a7522fb847fae07af29e760158c2969b369f7b88f0aab54a28132aec. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2562407.