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 0x08de9d2f3d386d0d81ca6ee6da140d5feb3ed7069e108bb512848066c0c6dcd4. 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/31942e8f-ed28-4c40-8bd3-8d67b99ef1bf.json and https://artists.proofprofile.net/proofs/artist/31942e8f-ed28-4c40-8bd3-8d67b99ef1bf.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 0x311a79574627f84bb51fb43a575e4382381887d0a958219c36bfe43bb36d8d31. 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/QZWFJ2314513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f5e2405cf15151fa86c2daa77616e7be52f84c1284cc3cb3782aada079fd2. 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/QZTB72310881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572d3f611f7fca8e574946ee539bbb69729a9e6deb5f73dad2379853ebd0cf90. 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/QZTB92310505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f35d98240b6fa6dc0babb27ca0925d89f14b27fcb4e4c1d89c3de4beb387de4. 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/QZTB72348506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcdc10511fba768f3ee03e373b5edde11b27136b46a8c935dc18979db60db98. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB42393000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2d75c188a21d760c2e723946da2d247c8fddfabef508141e6949c354ea6e45. 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/TCAHL2342107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f38c361dff43e7fc43977f907675dfe67ea88336916b3d00534457e30792bfb. 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/QZHNC2332888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323c27ffdefee6271903ed4396d2b56b8c8969920cfd25cce73ab78a3c2ccc2. 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/NOBXE2201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b089e0bd27f7ab9dbd37eb57d45fc99678f6469e14173a0c207d624973582e. 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/TCAGT2317530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7fbc9466e5f97358151cbf0702745c6aebe7ce576c275a682e95bceb99d8a. 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/QZTB62211500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6560c21f1ba31f1ef2c3292fcf0e539ed15321b8747b8770fadb4ee0012196. 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/TCAGQ2245330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a445271840a98ef1660396a17776b45888aa05556efcf34ca84fb2504b374a5. 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/QZTAX2287029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda474ba2ba7926e256745906d54fc33c4f473d9a5c4029bcf567c3bcf3f18206. 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/TCAGO2299305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06885c9f3c850522b8977a0d861132cbd96fdf737781443146d79d6f49e2d2f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAGL2264496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac267c0567ac96c84216c52daab6ddd4b3b13a8c0b53baf0168b6f5941b62c7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAGJ2286438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b874ac5c4591bf0d2f59d46be90669ce1b7dba7e44be0f36b4f1552c72196b6. 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/TCAGF2207708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6828f13b90bc4ca649192a845b389a2507d1971c43bbb9c5f421e2ffdc968acf. 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/QZHN62213865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e168b1d6fdefa6161e284d032f93ee867f83def35e8cbe413e8d9d0141f08. 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/TCAFY2197928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243bfb1508e260c4eefe568d5fb12bdfd05b69844116ea343057caf29df90557. 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/TCACJ1575359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d17fef7f6014579dc0c33a9134cbbb12c985891189055cc5e61353559e8379. 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/NO2DY2300693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2e6ca9b8f67237852ce22b450318a650104cfa08ca65bf4a1d8254ad22bf0. 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/QZTB32355610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c1edb38f646e1ef2e663a4f9ed8a1b14b01c0c78643e59db8a688defdd074. 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/NOX8G2302014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a54f53586eadd8a775f393dfff98647a899f10381fc73dfc02a5fbb52a126. 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/GBSMU1919810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf627e6d17c7a23700ecdf231bb366db4919af9247b9d4030e630fd5990c99. 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/TCACN1625096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690b8920ed1735f2b10da660f41b678a72175fcf6166eb37640b5d9a39363676. 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/TCACL1694410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ff6aac4ffeabea66ff01ecbc26f27fdbb05c10143f3287d1ed86947d68726b. 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/TCACS1624693.