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 0x2e31320ac40c76465b7a7986f9810522cad0518949166c71e29f01e66da81374. 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/62140f97-2984-4914-98b5-301b5a4bade9.json and https://artists.proofprofile.net/proofs/artist/62140f97-2984-4914-98b5-301b5a4bade9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Maretimo Sessions: Sunset Del Mar - Pure Sunset Feeling
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 0x1b0e5a496740a56ea06d0e9e1b6dfb848abba35d2224ad8bf6673b8ccd5d1125. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331302708 — a six-check JSON result.
Maretimo Records – Masterpieces, Vol. 1 (The Wonderful World of Lounge Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e5a496740a56ea06d0e9e1b6dfb848abba35d2224ad8bf6673b8ccd5d1125. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331302708 — a six-check JSON result.
Beach Grooves Maretimo, Vol. 4 - House & Chill Sounds to Groove and Relax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94aa4a6ebdbf4ea8b2568cf08ade6dcf365dc7a9a26931badab8a9f40893db7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332003816 — a six-check JSON result.
Maretimo Sessions - Edition Mykonos - Pure Sunset Feeling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3797db493cf5921ffbc1c8790a8c0b8badc2e49627e2f88fbe0f58f21192494b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331402870 — a six-check JSON result.
Cafe Internacional - Jazzy James Junior Slowjam Mix
Chill Sunset Maretimo Vol. 1 - The Premium Chillout Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccd3c6631b4e85d5465a9bcd8aa3de4824c09200739e5b506f0d010d6a1531. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331703303 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46527a5a2f89b8ca11c3eb846e7b763e6d229f32d64dcf00336263a839ee6ccd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331503111 — a six-check JSON result.
Vladi Strecker Presents: Sax and the City - Saxophone Lounge Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7a9ba1d66a7c2bc420433ccf0fb41bb291f09479a9cd8c72a2cb14d846cacf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331302575 — a six-check JSON result.
Winter Chillout Lounge 2024 - Smooth Lounge Sounds for the Cold Season
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bf11b7d0b935851755b740259399246f32d04c2647ca37091ead1fb85cfd5. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332404177 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc688b92d1b5e7760dbf88565ead66eb40a27f3eefed90be282f27ceed3cecc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332404178 — a six-check JSON result.
Jazz Dilemma - Jazz Loungebar Remastered Mix
Maretimo Records - Masterpieces, Vol.4 - The Wonderful World of Lounge Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f776bc1359d1f09187e1a072685bf1ccb7b1dc87e0be78eb492021b22ba51. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332304064 — a six-check JSON result.
Maretimo Late Night Grooves, Vol.3 - Cosmopolitan Lounge Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156ac1835fd9da3ef2abd1e523f913801d7e3c08d9b3412b28234f2ce2ff931. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332304096 — a six-check JSON result.
The Phunky Monkey - The Bass Slider 2023 Remastered Cut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a02f9c1add1f56f841d9b8e4508e6d7cdbb4791e246cccfc0da9e297ce5ac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332304100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955f30aa6b1e55c796921f177af442609968f01acb0764383de3f6dd573e588c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332304095 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1666b271a324d302489a0fdcbe1a82dbb4ec83d0e360af09d7bec72f6c7680. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332204024 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac65b993128003b96fe4f06f53b39de9097fdd818cb07fd097a9b05cdf8dd9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332003817 — a six-check JSON result.
Maretimo Late Night Grooves Vol.4 - Cosmopolitan Lounge Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20ff3212d091bd33a8322bf5a0c3ee0e7bf17218950657981e2597e5a619487. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332404172 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6a97cbeba66407d7a4cb7f8368e39ae5d7604ea61b74d2e41b0f68dfa0ee6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH332404126 — a six-check JSON result.
Spring Lounge 2019 - Sounds Like Sunshine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b75dde7f70a77971368d7de76c848945a59ddacff0bac14b2b800ccfe7445a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH331903650 — a six-check JSON result.