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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a37b8d44d08a62354722c1e90671b8c06648a333f204421e090466fb55f0c. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a97c50c-aaae-4af8-9c65-1a312998f77d.json and https://artists.proofprofile.net/proofs/artist/0a97c50c-aaae-4af8-9c65-1a312998f77d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb562eae0c61f9df53b296263c5e6fd305df9661ac7f848ecd81ce249ffe8570. 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/JPG201215624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b451c45be91d24f87d4a6fb4ac217525785ec0e5d6561fa2b4a71d979f9c14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG201215631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be9c2f9c168232fa9bf13a2a8064b2acb9cdb8847fe87191c00932df39e676. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPG201215639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe44e107f406e762346abe52ee3adf0fe02bd44bddeb179fa65cb069b8910e. 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/JPG201215645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935622a9d0f512ca421ff1efe015d206899281d389725fe5df45612ed6efb94b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPG201215623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2858bf34db0224daca3d1b4338649978e4d46dea898eca1ca462573ea21527. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/JPG201215625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cf848332fa96b11a007b2081bc2d792e43b9c3707626fd7a5facae40697d5f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPG201215626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f74be12f2acfec25e9f0ac68326bf2664fb91fce2de9cdeb8df61173a3eca. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPG201215627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b092e9c6b0b723907a983802e9198f6993d631b8e2c5e0f936bc081c2829d7a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPG201215628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a008e4ee469a68ed34530528804b4f0f90ce5cc36edb4db5b7f6dbedeb8ac1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPG201215632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66301fc76ab9a5343c4b59fa2a8c6fc7b28c09e40580ef3672ae85cffeb4b5. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPG201215640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43158c9d9e851efb0a0bd5f17afa7ae0ac503d2bd0ea8e887fb85a4d29cc35aa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPG201215643.
もろびとこぞりて 美しきクリスマス ナイト
楽しい！どの曲もみんな知っている、クラシックの超名曲 BEST60
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220515c3fa41062ff3f94bb3608741cb3884976def1e10e454ec5a17e627242b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG200911886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c3af2d6fbec64d3e38a26e3ee8684c8de9c3c9029148d7ca890b6d194459d4. 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/JPA652400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb54690c87536de9a7595cae0aa07ef8fd4986c39ca1ada6a67db28d05ae163c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA652400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee389e04ee4aa9af7dcad776ac594250678c8369db519ce9e710a97e66da238d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPA652400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc807940435e4cea616825d4d17dd81efc392aced98a5db4ae24384062ba4c87b. 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/JPA652400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acfd2422d9d5d256f143657bba3581b5dc232549f6d3bfb3e3eec483ac81daa. 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/JPA652400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c0d0b69c322d561854f63d6472edfe6b705333cfa8aa00cfabc219d7b3e19e. 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/JPA652400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71311f9e6e4da911e62131fc0e04930a1891d78437280eada1787b5622685c01. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA652400020.
ノスタルジア 郷愁の想いを呼び覚ましてくれる音楽