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 0x580158b93471fe0cdd32b8342a285c12ee3439547fe3a59da830bc6302718ead. 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/fe516b5f-5d1d-49eb-85b1-cf91d28f4a2f.json and https://artists.proofprofile.net/proofs/artist/fe516b5f-5d1d-49eb-85b1-cf91d28f4a2f.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 0x7b90aaad2e6b74cf403e7e75ebadb66c6a79b240334f2d205953428175dca178. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZA8ZH0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310f94791a69231f17335a422b00f3df4ddcb8c05f55f4e8cb81a6c0169fa526. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZA8ZH0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3760bc31c0d427c69d0a6fbf25b15bee16508d9d551119eb3c339e0085a0889. 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/ZA8ZH0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca92307493a84e51108dfaa4ebcc5357418dbd241a64a64d4f5d4cc869f19df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZA8ZH0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddb99e412a0b4ec5b42ff098f72ba4e9a1d740819f47f2ac9feb856a77ff029. 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/ZA8HZ1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2b4e96d47c0b0e3a8ed52a0c84476dd6d15c30383e79fc491780bf4fa8c241. 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/QZFZ42217689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871c286054d7ac3deab2bb02b4b8e103a9d6e170b71da001dda070419fcdaa6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZFZ42217692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca0428650261f451d82097163c438c45433bd7efc3e8525d7888294aeee3e2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:31Z), 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/QZFZ42217693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a9aa0a6740b8eabdbddf9083c9aa042e36cd4633e116aa039afd1ecd85344. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZFZ42217695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ce700a21ce1b69ac84ed6d77fea7936f6322193516c37efd5aff3995491832. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:36Z), 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/QZFZ42217696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c406c91e16b8948b938b4423010b90dff49e14a0a7503a3d129e73701e0a70. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ42217698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e91e363f0e612bcb254961f8d9472dad519c6cb38ae2975b4cdd19645b3ea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ42217699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc250767b81887a2f7d927fdb1884efdf1497e04215d7d15bda5c8a1003feb2c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:41Z), 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/QZFZ42217700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005e427d54ccb9b0e224b78320f8112a5c147851127af524bfa52a9c2b77f80. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ42217702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb3a65bc384a6a1e7e57f1e3ae91dbffe790e0543b1b305925dc586d5a68f4e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:08:54Z), 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/QZFZ62215891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc909e344d9ae72ad0aaffc60b7d276830398e1857fd039911b40558cb3f8b046. 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/QZFZ62215895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36949f861643a8d1bc5bd90d17e798ef1ac58acf76482b753417f7b89f6aca3a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:55Z), 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/QZFZ62215898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aceb9239c01286b35ccc3037bbb820fdd8351063dccb6e250364775024da470. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZFZ62215899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd01b58691ed063cfedc8e346fb7444aa02048161b6169bf184b01a292168df8. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/QZFZ62215900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3751d45dd8700865dc448ab900f3f24f7a5b24e9b9f8bae734734de968daad9. 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/QZFZ62215905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90c7f1e965111364a4b83685166ee34a405ccb5e339ea3c09c6b5c8830605ea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:11:51Z), 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/ZA8ZH2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ec240bb57f1db56bdaabad2922516af20f0b34da3587f6af796cb4b2d9330a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:26:46Z), 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/ZA8ZH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414cb6afba0b56948ff41789f718a324642f3dc8585e051386d1a5c9bb038d5a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ZA8ZH2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748e5d5ec724d2461762c87ad707c071980e96c9a41830693c8a9139a373b85. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/ZA8ZH2200013.