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 0xf266044741f9b776be14e67273842bcfbf8c6e73816b9f89aeeddc20b2b11593. 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/015b265f-5a66-4213-bbe3-871fc7c9d1c2.json and https://artists.proofprofile.net/proofs/artist/015b265f-5a66-4213-bbe3-871fc7c9d1c2.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 0x04eeb8908ba31c7ad7874ddc40455e36b017c5e7de5d782eadff8e6951f80f46. 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/QZFZ72039508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45794bc3be3d7185f74e6d1bf9c670223e43dfb17e75225a9b0b5220df3b92fe. 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/QZES62010669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83f799437a5a0e356c21edd23a6d673f57205cb51d61d73c0c15494d4ea400b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:34Z), 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/QM4TX2118457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264bb70bf05ff1587a374e582e8dd019cb4ca33d704eed2eb38f44b908f7354a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6MZ2187315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38387b08dc5f1865e8a92c8a4f990c14edde844cb88b5c2ac3d28da0dc4ddf4b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QM6MZ2162059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36dec1699adb636f5e65f974d3bb18f53fb2f32797ba21731387f852b14c0b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMBZ92185225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510f4bfd71803b2db13648ea23da846bf13de602b748d3ecd82c338ca8badf5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMFMF2137767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a612e52306415f84b07711a2f396e893506dfa35638322005b8b19e2486be8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:18Z), 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/BK4DA2308087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9684bad5c4533fdf0e5b4dffc511ee7d5a79864fee2aff52a935ca8eb9505b5. 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/BK4DA2309135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549932cb399ee9c40d2d93047f8fd8fb240d12ff75e1f3da6994292a12535252. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2318764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549932cb399ee9c40d2d93047f8fd8fb240d12ff75e1f3da6994292a12535252. 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/BK4DA2318764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d509fa01f63bb3672916b25f7e01cf69e03ba8160f17584b192d66fc59b3a4. 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/BK4DA2411502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc79890121e763437fe65a5b676d187d730ea87953ccb0be696da7086ea641d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BK4DA2455087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfde1b3eb2e4c1d5557abf72f7bbd7ba783b28f27db11b34434562a439e9d924. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BK4DA2463788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da97cf0a5a7b053a6cdee25a88192d10a949e72ed6d9b9717dfc41f9f50457. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TW2568490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423395fe8b9e495171709f54b9b16a4a52ecab99aee6c795472f2124bbc36fa. 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/ESA092502829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645202cba4556cf1f40787c26b1171455f387c83bbede8dcb0f64950cb65201. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TX2593606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fda1f384e353d0b07a36ea1183b74611da40dde02d708c1319a4ca3f0bee5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P42579657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4389e0316bcf4e6a7dfccfbeaeac552725bbe230b0dc3f7324c4316ec09f907. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6P42579668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc2a1e31c71c89fa2b722c2aac83a002f5586ea427c665ee26d4af19798a411. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES64E2206215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5397cd964d31c3713201e27237ddd33a329e4853fabf9d3f28407c40644c8a6. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:19:11Z), 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/QM4TW2174115.
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 0xd891ccfff22fd3f220e10914cc2bcb47ca617c5594913333a13e98de94bab75d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6P42153749.