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 0x9afd9610fa1bc5b265c9e34feb36a36a2acee6411bd9479c4a902ef571a8cfae. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3616142d-c7fb-4b15-93fb-481e5c02ae96.json and https://artists.proofprofile.net/proofs/artist/3616142d-c7fb-4b15-93fb-481e5c02ae96.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 0x92636c4538b41666953c75d6273daf9658e75ec9a207ff4d98e23a804baf9796. 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/USHM82120416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a24449c756cb8a272a5eaf284824ee7dff7e055c24ca570e60a8991bc8c23. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM92193990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65adf49a64bd2b5cc4f6674b8c1b1bdd62de0930eb20c882a2d0157fc17a8b25. 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/USHM92194051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232dff7043ef70459bbab1614bfbefa135953fbc8e09f9de61fbee15f4c5da38. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM92194053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd752a811b93b64fc8d9de241936b7b5c025c9cf1a75d3dd413aa4a88514d335. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM92193994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e766c6366254afd4015e12dbe35cc52949f29ff55532f717f3b237f43cafa5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM92194050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8aeb6997abcb1d260d1f177ea9376c50c3043ea2399fc94a191cf5f82be7d9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGH2262668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2df66e8fe623491d18f0b0147526cab4f6e1c740b53b0990396dac012b02d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/USHM82297027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f69fbc8d5251454dd8fa734da7a46781b6119bef49808520a75ada6ebb17b6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM82297458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505311661c322bbefcb8c8fb58f6f57ea952dd6a9057da68b20c4ce43eaa6f63. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USHM92224661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98923e70658045a3520567fa06f9558d23bfa56bbf1d1995e5ce3ce8e707e0d4. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGJ2305346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f056a44204c96f509621137ade855da940f85a070e12cd64849355f28c4b7. 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/USCGJ2305203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019f9e1d3729dfdfa59b42613d6a0052012cf6bebd88793cf4dc88f5c257532. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2305273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3498c03eb41bba795c15b33ddc9538af4a40561747f6c477246841b990617b4. 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/USCGJ2305365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f82891018330c706e634c7531fd200c4436fdf906c71e4dbafe64571dd942. 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/QZW6A2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f0302a023f77915b53da66de249699b6d9ae7e3ed041448387556f6459b36. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZW6A2300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6322fc165047a35320ba581984dac160f1300ad27e15a217ef6a50e0ac9fd0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZW6A2300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714202bee4da3a38a4be4beae494594f064dc6f2c6aa0aea58b764e9dae8c2f4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZW6A2300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce95fda0a832c9d67e71de9a985c99b59cef45a610a2273dc491ee07d6592658. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZW6A2400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa751df710e973b8ed3ef8ab77b2158549b58f09fead52e3cbe8268e683804a21. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZW6A2400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03d416dae062d22398f09048eeb9b31ced6528b5069210dc40ddd686e17241. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW6A2400252.