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 0x7ac3a700070cbc9a958c50eb6bab4e6743aa43d3e93bcdc88251f81118e207dc. 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/6a6d8045-0788-4e07-9317-07a932132820.json and https://artists.proofprofile.net/proofs/artist/6a6d8045-0788-4e07-9317-07a932132820.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 0xe1a2722af5fe7d5a5cafcd62962d9b319884a25600c526a1f8604df6756c90bf. 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/USUYG1018369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf903edfe97c6ed1a3572d69882cd55efc4460b1bc948053e76399c692503a1a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USQY50956829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc164f2ebcc995c37aa0cbc6538fe3284cd6444cc81d3b2c624be43531128d9a3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USUYG1018373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65583ecfecc8f5b590bd122d7c362d760c63b6ecd9146f02807e6cf5ff32073. 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/USQY50956831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6dafd8776c5f2e2371aa71c536b08757b45d6bf22cc3847315f652009da1e. 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/USUYG1018371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdfa9e38d05f39c1928438502b3c5da2732246c5caa410bfe9d14d587251b71. 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/USQY50960840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99679aaef40076dfbf933e6cad73e9259f15df92c2ae9d1d682f529ea0c6949. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USQY50960848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdd2b934be27d498e44e87ad6f55b5a986919ee6bc1425bc9871f5dfc7722b2. 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/USQY50959676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e17d4fbc470259b01f8d9509b3775b183e59cbaf23135978c14ab0ac87066. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USDNB0863503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de5837d9c8c7ec0aeb1e6e951927bbfa2c950766fa47874e71941e943302466. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USDNB0863504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06760a069849e76cf174b222ffdea2ff7c335e634569fb4ae1aa865d5dde7569. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDNB0863505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4061fd9ef019f7be2da616169fd9cb8de29a266e3d3c7f98c0c532868023fbf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1545253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf107bf2d7fd5c3796d00e7cf0b8c32d7ab4af535376c33afdbdf0729795bba58. 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/USMWC0911296.
How the West Was Won (feat. DJ Quik & Rodney O)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc1e3d75c7fd8f35f8cb065dc9ce0716dff2189a5835dce382f9f38ea3a2b1d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ46Z1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4061fd9ef019f7be2da616169fd9cb8de29a266e3d3c7f98c0c532868023fbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1545253.