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 0xf56f805812cb218bbe2c15ef3163cb802986c1319b7b01edfe088e04bd618d53. 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/99afe852-43f0-492b-95b2-c21f0aa8868a.json and https://artists.proofprofile.net/proofs/artist/99afe852-43f0-492b-95b2-c21f0aa8868a.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 0x4136db000e1ca2273aa0ea8727d42d0677daaeb3258e8faaa92a26fbd251f7d6. 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/QZMR82200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35531b64caf37088e088437bc3ad5a150ee1d550ddab0e46ad7bbe29a97f27bb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMR82200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6473a9792606d00556d2d71c606006ecf51b60be1faa5f44205d237faaec7. 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/USLZJ2335762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f922eaa29db6360e099089d4d84d40235c25e29eff5deef1cf89dc6121f4626. 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/QZKDT2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4808a16391febbcb40221dc63b9ef96712a4f50b5114e9fc55dd89159b5f52e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2486375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2da573cd02c345d40682ad47baf355b13cfcd5ca629eddd2707d26f2163845. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLS2416438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d859ed9c4d4357a9b4b5c4876e3162285905c101f22043a18b66a2387706c20. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ARIXB2402976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a83ba2e556e95237046f8e77382123f108eb9d09762356f52b7a2a5af9371ad. 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/QZTVM2450301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e6ce163a259124805aea5276a99ffd1d5e269f5bbe9d29897756d5613d1fc. 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/GBRKQ2556341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0020ea958c71e35829f3082b4b849134c1c01693619037b296d2235040a94812. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6635d75a928bce16663583ad9ff51724feeb34295c2ea55ca0ee5abdb288217. 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/QMFMF2407132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f00dd4d210d8199cb640dca62bd8dcf24a538c7c34aa16f451a0196fc1405b. 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/QMDA72464219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7723aee298e45d5bb2bf5cbcf06f286351aa0b826d5394158ae027bc5e99d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ8A2444813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb6f2bd482ceae1d5d6f3c23c57379aaa4f72052d66b4e7b34ff2a7e3ec6d2e. 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/QZTPX2464452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d77daa7c642bfdb3e9ad36606591e2c2c074e1b43486149066d2b979d38bc5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAIN2480377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627508e5535580b737819204a13b89b287bb0e867892b9a83138410a956c0850. 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/QZWDD2434719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742f0c51fcc0fb0f339c4f746b61fb8f8fd282356ef92c81e4ab91133da782e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZSYP2490006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f123509d3d0b8db8693fef64a56e8c781b2b094420dd2ed5f0216bfa2f6f2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2425606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889eeeeb2136ad781eb5076392f3f701e3cf3f5e04644bb4e938127f07654478. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLZJ2438303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a95d5490ee0e581443f72a278b0a30ebdf22c2eebea8e36e7d7338513a043. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2482796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fd7eb3ba3ac969324144b31599cf8240d32af8c692a2f87f9c1710eba2fcf4. 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/QZZ8B2392039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d589976bb5a852258f2f272eb909edb25dfa3573ae46ea3e6d5e0e0533be6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWV32321428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cb44374330a39227351b27cac558d4b9c6de31bff78314f54e010fa6ee864d. 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/QMDA72316524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452b33ccb8f3b2952f19f0175d605d66c26618f824e9941d432d656854aeca34. 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/QZTV32360973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5b3467a9ca8d63ec882d90c7ea927c66494afd1031460dc15bfa911085637d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTV32361152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dd7e35d29c745f86d703256b8deedb41047cb185c7c6c040e00c8ddd6fd3f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2321884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907c2c07faaf38ecf93f34220f0d6811c47d2eeeffa21ba44fbdb1ed0c49623c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLZJ2319803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e780b4ad44866f661bf08e34cebfe56b64c6a553c26b11ecb507684999dded. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2247418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a48db348df8aa63e8f91695b094feb349310ec049475597c5c6c93591269e1. 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/QZWDD2532244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b867d15f8b1c0d19dbc2b4adc7997fc6ac5a05c1b764c9faf56d7d9f72d6bb. 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/QZTRX2565656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36e1f751a3a9c2a1b377997651cedcce0c43babca9db58de11953364619cb3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA72261459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0865bb1e625b0579ce577d3bf33a0130cdc34c554d7d254b45a0402f8735fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62230205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2d2c652314b9ecf916ddf60bb9aefae785bfcb6411bda8e23171d59b67f2e. 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/QZQAY2431516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e99328fb8e6807d0fbec17da43fe00e0f2157a9c0deedcd515da6124366fc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBWUL2318509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36e1f751a3a9c2a1b377997651cedcce0c43babca9db58de11953364619cb3. 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/QMDA72261459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b45e36c9e91329c5fd198bbb6e36c4d0ec3c9f83a1da2f510d83f02d5bb3cf. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZ5AB2446553.
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 0xdcc200c1de7dae477552936b5727a4c3eedbb3be522edf8003e9f16f0fc986ed. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE6XY2201505.