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 0x712819c3283956be9bcb89689d425753c0356ec6b8a6fd634a16a7ca47f2a74e. 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/b4dffccf-1de4-433f-a9c4-bbbf0bf78d9b.json and https://artists.proofprofile.net/proofs/artist/b4dffccf-1de4-433f-a9c4-bbbf0bf78d9b.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 0x87525ebb3869778ef953b96eab8be3fcaf95a04e16f0e2bcf0d53c6de5a631b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLX9G2200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5369b8861e17327c9c6431bf4cf73f2ef344c4a70c784d72240e0f7835caf4b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2272495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f75b0c55cde3911426dd5f47d0f38db84cd283951ce1bfb7218ec31055afef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2272489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb65274a2b79bea13faf5e322da666a11054262b589ec25f0565f3e5e30120c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLX9G2200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661df7c320cdf90b33623542bdf14ec5546280741d4d68f2857b32a94f3597c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NLX9G2200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f893c5cede5f6258fcd4912a5b1b28c0fbe5bd18e84d1742d5d15aca502d451. 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/UKZGC2301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f125990da5aae1b5112a94ebb843d87ab62f2b360a6187da248c95c9fbc814. 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/UKZGC2301815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ecbc095022a71e2dc49165d9d9b8996271fefcb553efd1a1bddec43457ea82. 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/UKZGC2301816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a540490612569da38eb7553fec34fd8643898773004caa20d890a7fb40cdb3d. 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/UKZGC2301817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a806c7cf318814902449969113a67fd85bfed5ad368146e493f38ec2cdd5d. 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/UKZGC2301818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a634d37f0221ebe2737d3b803ffb69b8ee1e8f5fc1ec43b3fb72006bf805e. 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/UKZGC2301819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e824bff22ff2f189e53b7f482a210aa9d68a4beebc1279278f170ef4dbda848. 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/CAQOI2305675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870020f4a334d8487b8de93667d24a9d4156fbbfe5ba72603d7b053f8f431f3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:25Z), 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/QMANG2254607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885470ff01063ddaa927742d4215e162cc7f8a784499064f49d7f8ff6137cad. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMANG2254621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7790a69e120d00e1259251974579cabd1e89a710518d805801ed0a23c0cad1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US3DF2404930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0fe78004ac272138bcd28883faeddcbb1c13f6c4999270861ef161fdf21361. 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/US3DF2425205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf499171325301c597d0281532bfe960e62e73ab234671a363123da680cfad987. 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/DGA062441207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08629dce03bdf313084e32af249dce12964e243a9087efde3f38eec3ae72cf4a. 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/USANG2453118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6e3fd24e699f9c5fc1644a3857eca2c25c722084b8211b1af11c1b1d3fde3c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2453120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82f728cd749ff70f793f2cf608695a188cb2db5849558c01e5e949cdfc633c0. 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/UKZGC2307380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65d1ed1fdcabd6d5b8de7a496c1b32082292d248b4f2e85ce9f82b1f6cdc2ba. 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/USANG2210426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2fa88bee5282f5615e3d5fa71a269cc5fa538ec1edbd7970be03bbe949b946. 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/US3DF2425200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0fe78004ac272138bcd28883faeddcbb1c13f6c4999270861ef161fdf21361. 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/US3DF2425205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3cac05c7340db53bcc969b9c4052c273dba07c4cc450816458552eee348628. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR8FB2400600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce55bd712d311ab985f17cab5831e1db25e73e132e5a976c556cc6c803e1af3. 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/UKZGC2407690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e833a3ba39f6cbec0fa1faf3f7338913e101cd9addeaf6f315c9461a368c59a. 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/UKZGC2408322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c0beda80d7fec12ae15a087330d2b089b0968c10aea2d8d2cd6fc50a14431. 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/QMANG2241761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f1ae55bfd1389a82c359f2b68fc3ecd25442f2f52fde5304514b11b9db0a3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US3DF2044651.
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 0x68ed558e32313aa6562ec291112c602d76351bebb5a398525d2836b08ab8a11d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM3DF2254245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1790af3b3b3a201d416d1f76711610b95d5c5f3bb9b30615e14799613d66377. 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/USANG2248421.