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 0xb90f47f3420bde01b4d58f7d03a614704565c505391b93b541a07b58b2266edb. 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/ddd8c0b4-aa42-41d3-ae2b-c3079201dae5.json and https://artists.proofprofile.net/proofs/artist/ddd8c0b4-aa42-41d3-ae2b-c3079201dae5.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 0x9e26bed9c6eb932ba2c72e252788812a0f3cb67a2dd5e9da0328c65ad4201189. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAX2259574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64afca045fc0b3fdbb84529837e000f14eafe886de62c23a7b98e67518f2ff. 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/QZK6M2301210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0371c033b89222f52de47a4c5b1a80e78a8dc6f68522bef6dc2cf33e9665dc48. 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/QZK6M2301212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb774e062cac69a31ebf14d708b40a8552141c23b478135f560b54ffde5a2c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6M2301213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50050a3a7eeab7454e597cb7c2ac45a6cba2ad9e341e12494aea7a3890fe80b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:45Z), 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/SE6HN2423331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93d8ef6e35b598f0d806bdac2224699cab13e1ff99249eb788ae2455994741. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:54:59Z), 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/SE6HN2423332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96677e2d65c944d97797324127f3f5547ba680558337e2096d2b07e7f751d5eb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SE6HN2423334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7452e5c56f02827b2fa01e09962b9bd9ed254f1d6a54500d2f507684f3e86b92. 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/SE6HN2423335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf1fb23fdba1af13ce785132105d7817efb330104204b4bf8d31d56076e088. 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/SE6HN2423336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab8537db144e70811fe36b04a0713e908f205cf46355386ff3717b1334775b0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:29:18Z), 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/SE6HN2423338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7934fabee419bf338207da3ffdebb3f9a9dd5a6a6e357b62f5b5379d68fde6a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE6HN2423339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5baf61320f52ab71392dede0a499692a64a10adaf4a2198c32f977f95e7c8d2. 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/SE6I32447126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa2a98917e05fea7f1e8c7ea85e4386a1b36edfb880d67291867297ff31e1f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SGB502520655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5e0ac21c62e6a2ed410b47a9a1aa722052f4c7bce869ca65a5abe2a407a62b. 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/SE5BU2577850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a47d3e3b5aaed63aa598b259581bc1156f171837276ba82989723fac15c603. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EX2506782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8a07612283216d27829cee3049d567f6c9aa3e40f12f3f7d29127ab908f511. 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/QMFMG2360241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1b3948c4286ccdd653307920e62f63f54cc0d70bcafe01fe64ecc571861c3. 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/QM7282412529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ab4048a0002a113382de70c55239874cb933d19b8a9de8f42035838ff74de. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTPX2418980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db1629ad920b00e23bdaee538963cff9df8d2f5d33145a1d3ccd992526b76f. 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/QZWFQ2351420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af5de0daa9f0e137169cad3bd5157184a3b9797714115dcc476974de63b3599. 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/QZTAS2354911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db6a9399c70e69c3481d45647e5a9c45fc71899dc422def2806483c1585f7f. 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/QZNWQ2354541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bc33f579744adfcdc7a26d40f1acc441d92429ea106ec229659c8b86d98a52. 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/QZES92363546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445db8d235d0ace4cb8f904959bf55e55e4ba30aeb3fea117b2dcaa81288dd6a. 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/QZDA52325484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e6bc816a5080841b6a7ad432da095637d28eb76948ab6198b08ce2c8b4a2b9. 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/QZTB42261528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bea7b251f3ad29ac4b19041caa0ee43ff607aefdcc6defbe896fd7b05ea0c18. 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/QZNWW2253274.