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 0xbdc5e183374c49b39ea3394fd71fc5ab530546f63cb47ffd1e28e565747781cd. 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/f8b9620b-f5ee-4138-a3ac-a26b13ca46e8.json and https://artists.proofprofile.net/proofs/artist/f8b9620b-f5ee-4138-a3ac-a26b13ca46e8.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 0xd8372ddc73789b0468844120a521928139f00a31e31ba935326af45b77665416. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542131536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ff650921e10b5ee33da420e0a5eb7dd5a8b5a2f37f0faaca6e6ae9bdb683d2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CH6542131537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5ae0722541ba8c499ffbbcd89fb7bd01b00e55c5db0147801d887c9f52613d. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/CH6542131638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb1a0bfee36b9ff1819fe97ee8bf4de9267ef3e03bcb24338d4fbd41cd93baf. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CH6542131639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4731cd5245b230e1ac34da3a57c0d82a9336ead676e532fd4420cb533303801. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CH6542131641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4c858a355bf70125453aa193ec6481a592628a60e62441190e3bacb0380831. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542131642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dd414786881f0abf134a689691fc4c647fc4bd5ef6dfe3533245b83b3a4a17. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542131643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d35733df0bc82abf6178c32a9e17c7cdeee3e2e426ff93761ff84dda9fe64e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CH6542131644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b81ef9fb72e8c4eb61e26885330e0aedf494f4beaa0737b5c422c0717bc39fa. 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/QZNWT2311770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8de6693ae51b32cf3cd3d841f2521f2eb06519da8950ad7deda488ffdeaacf. 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/QZNWT2311774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b0a07943ac58f17c2367f0f21e3c6ebc2da8038121b123a27b2284adc6e8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWT2311775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7cd15c1bac924c2d615d9e3cab55eb156b889b2990b28c3d5ce53ad98a7bc3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWT2311776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77880988aecf01d58162306ecc92cee85a382abc155269401bdeb3681d22bf22. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:35Z), 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/QZNWT2311778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e2072b3a624460b4d105bfa7123da6fbed7232df1bedba5e05f109198d6d07. 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/QZNWT2311779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d17d0b93ee67ffdbc982bf499063dc75f70e749f1bb9a6720c264a8bf8de29. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:08Z), 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/QZNWT2311780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0148f082b24926b727940cca401a0a09d48944de6f175ddbe48a956b9f93093. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWT2311783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd387b1d146bd76437780b899e2521c717bf1971d360958ab2f6f176a45c3f8a. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZNWT2311785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa664d6d36948277f68e0a25ca3f717b41b18ac9ec77b1ea8bb28d36e1cd5431d. 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/QZNWT2311787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53ab19a429821513c3a7c9b6c25a973c0b6119f95fc52d0248f479dce3f868. 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/QZNWT2311788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5feaf89c137e7e81bb6902cf398c3a299aea3f03485d861ea676fedd867195. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:02Z), 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/QZDQH2538420.