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 0xb9ab8a7bc20df9f39c1b870de139d98b0a0242b77f34f21a158afd9b4f3328f6. 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/41756f5b-6d8d-4d27-8fa3-c9a88d6bba23.json and https://artists.proofprofile.net/proofs/artist/41756f5b-6d8d-4d27-8fa3-c9a88d6bba23.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 0x3a10a45da8b9fd6612ef9304f7ed09ba0551dcb1001e4dabd261e723b45227a6. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/ZA56E1601785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4981c7e39fa5490684bca7923c2fa18066f4dec6cd46573eecc62887254e2b9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41939780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9057251b155fc11beee6303c72b15a9ac23344981c6f10669d5d90c106271a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USDY41939781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377f735bee475b5b22f452e0d5c921b607b553a194bd0df0ea2ebcb70e6e801. 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/USDY41953208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee5f191f980b011834ea6b5bd0763dd3c0951180d2cc504a5bff13cc1a8bdb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USCGH2066819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63494e089ce9b92075c5e5371c4857826f89cef7959b5d1e017951e3867a00d6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCGH2066820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2215015b8739a829deb2a7d9f6a0a888c1baf753013f22c0f90dda45b2a8c476. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4Q2156383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6aac4d70896c4d0da560c6b46946e719a4d71f612356700bd7f29eee78a365. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4Q2156384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b978779238615714257efb15a1c1b2ad4f98748c5a0b91c8ba38408b3888d06. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USL4Q2156385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992851f5a6febdec887daa4a20f149dd2bcac72cc6257b4117a4e99d7af782de. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USL4Q2156386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6541d43c910f0cdc4c278274c7525a20d971e0992f27aa172a139c2fb61aacaf. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USL4Q2156387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379fa49c05be01857d60558807504fa0f57fc292677606bb4aa5b8eaa42cfee8. 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/USL4Q2156389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9417c9b5a7e36ed6c51c751c13ee11dee8c21b58e6321245da7a7c6349c77. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USL4Q2156391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796ebec3fba058c3b73554cf3fb4b0316d7fa9873283d3d4cc10b67fe1ed585. 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/USHM22227469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3b403b9328069f264e10bdec278175584f90abe90258215f2f33eb8af2b7c1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM22286194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5da15abae57a9f8e91ee1ff8ef050290fe7f3e4194ec9c8e1c20ec5d5bc6b9. 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/USL4Q2246443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff419971a3cbaa493736ac61660ba563f1432be89620aebce7b2fd88f472bfb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2246457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b46d42e4caa35522b7ba0a6ccaae2840ec7b6c65c63c523dd72acfb29d1b7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USDY42391224.
Iji Okun Ri O (The Storm of the Sea) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720865d9f7d996ad4b3baec018eec89276d0b10202caa8e6beba608f8110db04. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USX9P2354304.
Kilo Tunku (Is There Anything Else) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1d9db4071e170d25454794a83f975f4a679a16632270d12fd33a8e3dbe072. 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/USX9P2444463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e9cd05997f69fca704f3082c750148f051677113f3f6c4e0367279a8523a8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USX9P2487550.