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 0x8c254ee8531c49aae3b80a19b8a4315f02075bee5e814240a9c1ad08a343b309. 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/2fe142c9-d01e-43bb-8d96-3cff7a5ab37d.json and https://artists.proofprofile.net/proofs/artist/2fe142c9-d01e-43bb-8d96-3cff7a5ab37d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Degung-Sabilulungan: Sundanese Music of West Java, Vol. 2
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 0xfcfdb77d188796287f1be1a6c269ac08bbf04e3d1e7e8ba635d836869d716df9. 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/NLEM80848061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f77b13c793a8e2a3e297264f768a3985f796625e5c343f43146aa56cd224fdc. 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/NLEM80848062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a0f1fce7fe0539e8bd2209d8cbf67f9345b0bfc66e5700267ef11e8607849. 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/NLEM80848063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f616487918e54edd19ae6558ab1dc455eaea68377e8f9436c702e92ef33228. 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/NLEM80848064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fbc502a5e8570dc91de04701fbe21e301ace2b3539c4838e3315d3f2c16bb6. 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/NLEM80848065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177723ffea2176e2650f3b41c8952c26d92493089596304edfd25e59f6be29a7. 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/NLEM80848066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcaaada184928dd6d6beaf0be049a4b78ce1c65ad36ec05c6fac986ebbd5bbd. 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/NLEM80848067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd31f44d3583af6824b8a0116d75f7223712161e9b7b9fca64a6dfcc3a0de3db. 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/NLEM80848068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e677b35b2ea8484bd928184ae599d5ff270f35e7b16d97e8106fbc704b8ce7. 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/NLEM80848069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e144e09a5fdbe6a66f33a8116f74ac43112c6f7cfa87d47f9e317c2b8b2d9. 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/NLEM80848070.
Degung - Sabilulungan (Sundanese Music of West Java)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deff80a30f5c5d3eb57360b55c998d1c386cdbbd0575e40678267d6f9f8151a. 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/USMC39857041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eba911450ea4c609dbc2a6dbdd15fb016bd4bbae1cf4ff5cfc849573cbe092. 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/USMC39857042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d680bb906f1c822f3726e6738d9b6f5a0e6430912c9075c0c9b683894e84894. 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/USMC39857043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb253664e14e0b6736f84f01b3645a56cb3da2f6392a8b1190ccb4225350b3d1. 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/USMC39857044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc319f63cdf32f023c1f36518e1ec233e12350ff722f88d4439d62d2bee0a1f4. 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/USMC39857045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056c18d0566ec943b19682371989cb876df4873ce4fcb20e612b718a0fffc6c. 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/USMC39857046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ef8007b2254a59f1148a0e1f220e14c5cf30583cf1819749ebd0f0d6063d4. 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/USMC39857047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e40450656300940a1c4da3a89e0b6ee1204422e986c4d13c98f639773585fe. 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/USMC39857048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a5ae2962b7d966167775c9ad30ff0d8f7292472cf28695bf20b35bc0a0369. 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/USMC39857049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2004496bf31ae14259a8c85ceca4de09a0490c181dca2fa1bd4e1910fd4c59. 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/USMC39857040.