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 0xceb3b976b9455250e054083d820c43d72dbf072feec28576765f04be3931d7e6. 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/e62ce7b3-45fc-4a82-ac30-302bf5b0af65.json and https://artists.proofprofile.net/proofs/artist/e62ce7b3-45fc-4a82-ac30-302bf5b0af65.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 0xfb925e61301fba8c6208cff1fee002dca05b50daebbb8870e1c73ec122af7810. 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/US39N2310374.
MOCRO SCHOOL (feat. Yunes LaGrintaa, Hani, Kassimi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4162e80c2510ca637d8ba145a4f027eb04ccb767d43d1edbad4c1baa43cd1. 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/ITQ002401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834bcd55382305ea004a50abf2b9155753578edca6ddbe8e6a922e00d1b0a54c. 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/ITQ002401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d93ddba9ec4717b052944034abeb5de1e843a90d8363c2dd1cb740d46e02649. 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/ITQ002401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404ce00b7d63b830f74aa7435b40b0d00b2d6ef775160ed9819e6812f8f9487. 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/ITQ002401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c8ee682feb8e4c4b0a9598bc3487924b6dd33f872d1c99b1ed2ccc905fc2d5. 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/ITQ002400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c08396aa7b73f5e62f0ab1a5f19c6114a09f4e6cd256b1d165128a3d9b1ab45. 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/ITQ002401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e359a47dd6e38253c2c37e9c99b3e9ed0f48f4d2ed399fb7e4d9a8f37e8e2c. 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/ITQ002401311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfcf24e1f4bb995516be57861c77d2ad58a620a4f62df2040664e61929dfa71. 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/US38Y2301331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd7f939329cef26610988c31192b4929a17bc026991ab3ae787a238bc83332a. 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/ITQ002402308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e61412c96506b4c5005b57f7dd333c8bc4894ed6e7c74eaf6d6f29a1b025aa5. 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/ITQ002400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c8ee682feb8e4c4b0a9598bc3487924b6dd33f872d1c99b1ed2ccc905fc2d5. 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/ITQ002400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5de3e00996948e3b53dd654df18420ec594ffd977e64b72659ebea1fae0706. 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/ITQ002400297.