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 0x8f74c03dc879ac55114b546b8ef5e60ccc1791bd2e521647c01a25e2cceecc62. 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/596a2a56-d125-4bef-bfcd-c7739b44c349.json and https://artists.proofprofile.net/proofs/artist/596a2a56-d125-4bef-bfcd-c7739b44c349.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 0x796fc528116a026325678a8cd35fd6c01a958e177601cc4ad7ff0622324e7695. 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/CA5KR2347311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09249b0f02ca8313ab9a205cee72309aec0d2244913719fa0d4c29c325313b72. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA5KR2347312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2261ab96b798f3ef11bdc36c7575e370e9bb3dbc79c49cbb1c892b0454d165e7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA5KR2347313.
Melody Of World (Alex Bilancini Edit) [Alex Bilancini Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee7c37ceb65bf57bb2151e5f00426976abdc9915c5467a92a7443408c8b944. 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/DEH742224713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9e9c6739bae168637dc49ba9b076f55c6159cd05a6c0f7978820dfea0b535a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLCK42216356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b07152eda31d6fead9cbb9589645c38139b2a32f8b4c386020b6c927d508033. 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/NLCK42216357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7546c7a9915df099dbbbd43ad55399181b59a56b13095badc8c5e27b05e5ca7. 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/NLCK42216358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e82834bb6995f07281285d43167bca2ea2fbf0260e57a173c6e22c0717d45a. 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/DECY52101825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647330ef8abe1762b19db0de2ba3e02de5ff7bf3794e13b9dd013993d293146f. 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/DECY52101826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b908cbe076e7e19018bf38f0d4f35decda39699cae87bfa41d46f775fb106a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DECY52101827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e293338f969300f43692407051078e8ed4fb3a2f142671846e933c439a65a. 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/DECY52101828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a41ef5dd94fb13c238407cc0e06e3a9a0861f9da42588dcdeb8f2df733431d. 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/DECY52101829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61a22cff9bfcc98751cabc5961ec1f853524cb2486e007530940b6bd4a2ba29. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DECY52003454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cafdc9873f5bab3362eef0784892780570313d49d24b43036c39658dc96cb4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DECY52003455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b9c66ef062c6d1dfac99d2b4795b8965e5c355ccc0bac009c372805a022bc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DECY52003456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97669a8235af16f4356caa9eb65fc2033c3967ebd4467cbc117a0b9b52b51d0. 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/DECY52003457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd8dc529cb170856f3ea1e7a5eabb4c2b9c48b04ba57fb593d5f3d0126b37f. 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/DECY52001197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fcfe675f3c859bb207ff9d1658c7ea9e30ba42cfa903e29f282a3207978811. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DECY52001198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a0feadaa090a5f2dedac045c22380d79b02f86382a22e3f2bb2c25d49ecf26. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DECY51902756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f5915ed8da6f4681f122ed96df2635412886f997907c98bdfa0251fd54794d. 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/DECY51902758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc516833068dadaa1685957c6199602cdd4ac96a6ac79762569de35db136cd3fc. 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/DECY51901697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256ddd6b50d330d6dea74a76b597828b2dcee3d7111fe7e5bfc07406cbeccd0e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DECY51901698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9625618e0d763702e4997e4bb980ea12eced76bf7f5f20d843ff3d1e0b93d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DECY51901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab83be0084839fa93fe6b180beffe7315fb60ce52df441b303a41108bbff6d90. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEH742230772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d4f683e16ed43ae0fd5ac4561f9efc3222ae16cc0ad6b94bdc31d63214eed. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DECY52100781.