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 0x89d494094051da8f8cc82488a9c368f6c2cbb04548691197bf2b955ffe9a685e. 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/72f37009-af85-4095-b7ad-20e9010d96f9.json and https://artists.proofprofile.net/proofs/artist/72f37009-af85-4095-b7ad-20e9010d96f9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xc0c6133a4147d6f7aeb0fd7f323bb439dbf1167c7b3ab29c041c0ae603bc891b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42240888 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee110aa1052121afc9bbbe2d72796c2bb8fe23c0cb5ba5a2530c92f675ea38. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZHNB2273028 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789baf32b25b469fd01c3260d7c957e871a20c1710028e4416e2d78ef594159a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2244645 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c425fba289a813d753a1a4384b0c67572511516572aedc86219188104cf2914. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES92322680 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801613d1dd2f848086ad716385166eedd7eb8e303584e01bbceb1830259d5697. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2332734 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f60ab76a5280d7145b480c1f1f134f61159b2d32bda139348c0ec3f5d1be4c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN42405931 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fe32cc10c2073e056027de6d5599589ec116de277a1633722996fa20451dea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2541886 — a six-check JSON result.
This Way Out …for Prison Lane - Downtempo (From "Sonic Adventure 2") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1035bae95dd99ca46a1cf38a73c4c580dc591cd4c387df910d5d727945ca8414. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32305121 — a six-check JSON result.
Cammy's Theme - Downtempo (From "Super Street Fighter II") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fca612cb5da357b49af6bb593bc0e03f7790c256369b5b0af912d4dc209e9f8. 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/QZPJ32266458 — a six-check JSON result.
Surfing (Lo-Fi music from "Pokémon Gold and Silver")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe770dc2a418ff481c0ec30d9f94c18c12ea6b5a67379503b8ca6baf0c9f7ec2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32365099 — a six-check JSON result.
Cycling (Lo-Fi music from "Pokémon Gold and Silver")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0c91fbcad4121cf0fbda0fdbdf560b7e3b9ef087658f517e39647d3a236a9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32353633 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b725cc21ea8a1d96ec47a803c52dc8e535a688e57db678c23746c721005deb. 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/US3DF2402477 — a six-check JSON result.
Loneliness - Early version (Naruto Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70da01762fcf7abcaada10fa2e4abf5ce35dbbf47463ddb1c12eb0afff9f6e64. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2402478 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ab14d6cc29f484944d2e0060664d070b9f2a49bf6da4fd8e7e73e7c726b814. 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/US3DF2402476 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c96717db6881ffa6f20052c4dfa82557f8a4a7520f59f021728356986f0d6a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2402474 — a six-check JSON result.
il porco rosso (bygone days) ~ anime lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35be8f2a0e25df04db28f178742c63129c9a2b24a9e6a56fad0c6e900577c62. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6H2350646 — a six-check JSON result.
Prelude (From "Final Fantasy") - Piano & Guitar
Prelude (From "Final Fantasy") [Piano & Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bcdd1d865a82862e00091167d6ac48ff3426b881cc5b4f6ea3a0d27e523158. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32284621 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b005adadc3d0b019ecabd400efbc78c442b174fb4e0e1aaed12becd0d9f647. 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/US3DF2454402 — a six-check JSON result.
route 34 ~ pokémon heartgold & soulsilver lofi
A Journey Through the Johto Region ~ Pokémon HeartGold & SoulSilver Lo-Fi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d51b2c6bc3dad085c45ef062da5e241db47870cb9a1827d4923343a2923984. 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/QZFYX2442544 — a six-check JSON result.
goldenrod city ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20c302e186a839fe0ba4d34d4dcee81fbd5032b9fe98506ed12783abeca5080. 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/QZFYX2442545 — a six-check JSON result.
ecruteak city ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062d70c46229cf92bca1d6ca96327e9cb6afb860a1a74997314095ee485e3306. 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/QZFYX2442551 — a six-check JSON result.
safari zone gate ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9af5bf4473128413bcf591e3d4c1f1a75a7a816fec790e70e5d5d31eb28e97. 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/QZFYX2442561 — a six-check JSON result.
safari zone ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb30c9ad4137852e74230a08c638df4a765dab452a8e29d0e84041144bf91233. 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/QZFYX2442562 — a six-check JSON result.
clair’s theme ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311ed363440791412731c622c226199cce24fb6e8bc4eee4a35e8d54357c95f1. 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/QZFYX2442567 — a six-check JSON result.
route 26 ~ pokémon heartgold & soulsilver lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058845fe46c8af46096a891ccf324ce1856eec300368331b9937dbb6c095b467. 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/QZFYX2442569 — a six-check JSON result.
bicycle theme ~ pokémon ruby & sapphire lofi
A Journey Through the Hoenn Region ~ Pokémon Ruby & Sapphire Lo-Fi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef9b0c73eef2b4604804d8c2b88fdf06b84819e47e388b2eea11b7fec69583. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2390398 — a six-check JSON result.
route 113 ~ pokémon ruby & sapphire lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b721d040ff5f71c30c31251ee2c301925ef2266682d7795a8038d20f84f7d. 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/QZFYY2390400 — a six-check JSON result.