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 0xddbe169512c1dca40f8bb49449c040be2010b8344facd5a2bc7d552ff65855ab. 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/62f5b808-e7ba-4769-8a41-b2fdf99f33fc.json and https://artists.proofprofile.net/proofs/artist/62f5b808-e7ba-4769-8a41-b2fdf99f33fc.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 0x2f383cfc57a7b8cdbf7b091cb2ef707be3a273489ab1b3883a62fab352686d0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITC941000632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb0d710c9e871036d63ae46b8b6668d76cf15ea00094efd3760b56242c2ed51. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ITC941000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c342a9928a30094342499650d584334a0265ba9e353968ab70ba7e0f4ce3f6a. 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/ITC941000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c7c39e39746d2860e7e98de4304ab482d98baae061ec999debc2ca2c06266. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITC941000644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9841279e17548bad0cbbafe564a7f8ee158065fa749c97ddbb37a6d3cb2be51. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ITC941000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8b1c176f015fdc6e5fd148255d906516133edc2bd2f7fb41de53546a683fff. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ITC941000661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cbfd194fd1b1bd3e047564bb22ad94c3f64eda64d0a8a7bef4c5bb73fcc2a0. 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/ITC941100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25169e10657581fb128d2fb98bd105c33656d6c4e22c8c1f3eefa025a018b63. 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/ITC941100071.
Vivi nell'aria - Slowbrothers summer 2k11 remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b1ea8d512a22923a08cba5f8336ea21bf9b24db927873b4e29ba720fe5236d. 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/ITC941100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53eaaf931256c90b84adfc8f7aa5622de3da4c11c6f50855c4e3db887d12c78c. 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/ITC941500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabaa5eaf5c2f4340e35c37da5b59156bfb3f08fd05b5abcf8eca00aa0b88bcd. 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/ITC941500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338291b703bce6fa9913db9e2a980d26c8ac4fadd2f4bb1ed1f5f3aa304488f8. 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/ITC941500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab052487070e34a14f5138597bd9d06710c1e3a3683acd33ebf2b19fdb5459. 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/ITC941500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14587efcfdf72d99196ff0a547e4ba8bbc59ec0d4e0b2ddee1c9908bbb0e10f9. 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/ITC941500057.
Happy to Be (Because I'm Free) - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cff411e2893b514da75863b24db4d938d7e58c0a572780f7312ade677ffc91. 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/ITG411700055.
Happy to Be (Because I'm Free) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda197860b711a5acd44dcb328e180d3fae04ac878a323a6a371ed9d8c38630d. 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/ITG411700056.
Vinci un viaggio (Ecuador) (feat. Moova)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428d136d6a5ab4d91a9ecd793f7bd76e60b0b044619cfbb405ebb2fe770d498. 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/ITG412100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a1418084fcddcc4fd1e686b9b10fa5f0b5fc420d9793da6c621c87f2da88ae. 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/ITLA71900666.
DJ Matrix vs Paps'n'Skar (feat. Vise) Dj Maxwell Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3466d0f79e6a7489a32260a89382e7cdf3ba889ad3ba959cd7ee29e65cf81. 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/ITK191600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe880259ed67155186e993a0aa1fa6647f1382cb0e5006ee9f2885f6ec3762432. 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/ITC941000630.