thumb|right|350px|Polyrhythm: Triplets over duplets in all four beatsSlenczynska (1976). Music At Your Fingertips: Advice For The Artist And Amateur On Playing The Piano, p. 43. .File:Polyrhythm.mid t
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 0x98a522e4d0fd5cf4c0058528f2ae700774f4b0fc96e45457ea0f38338d54ae28. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63d0795e-e4fa-4d6e-9f58-a84d9a88b67d.json and https://artists.proofprofile.net/proofs/artist/63d0795e-e4fa-4d6e-9f58-a84d9a88b67d.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 0xd406ef965c41d412e654021feae3fa55cd2d087701f9e049996189cf89bb9202. 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/GBHEZ2203261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aab2f8270fd98b16eac7723c2210f6a6d5e0f5fb63f0a7352e02c2e97fe33e7. 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/USAH92200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac2154315adbab068b2889af1e859f85a8c72419fa98fdd1fe6423cc5eecef. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBHEZ2203327.
PRM Unreleased, Vol. 1 (A Collection of Previously Unreleased Mixes, Drums, and Edits of PRM Releases. Incl. Bonus Track Bendiciones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71aaf9e8ef1fc147fbfd9c1a589d4fc80026b64ec74f4280e29bbfc989dfc38. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ITLCJ2100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8dc723d29cd1bd5d07830b98571b007b1761c65f94883ff6ad09e9a4094c3. 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/ITLCJ2100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568b9d4892d389aacc75fbcdf36221970be05253b558404175cff7f6f7fe7fc1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKBJZ2400001.
Ayabo ( Iñaky Garcia - Afro Club Remix )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f6991a557ee58892d08ed6ef290c1dd5f2197e1234a1bb1408a907ac9621f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBHEZ2403523.
Away (Incl. Walid Martinez & Odasoul Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9db5934abe0c29f7a0bc0e78b2c3d9f6c4a1adbd3ef8779ac9878915d64f1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/UKBJZ2400051.
Could This Be (Incl. DJ Jarell, Zuni & Norty Cotto Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4afb4293f0f66aeba2fc9525ed9af4ff305f8669ab7bfe074dc678370f4042. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/UKBJZ2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf371be8bff85f42f073929c700e1aa1e5fe3a12b29ab1eef2504b16427418. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKBJZ2300005.