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 0x724e44677e15a607d7c147c595cdbf455040fe5e99e348e9962a42d187e8de72. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37db9599-fe97-48b8-9633-e4d769c130e1.json and https://artists.proofprofile.net/proofs/artist/37db9599-fe97-48b8-9633-e4d769c130e1.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 0x55282272e8a05f0b77d0b36853fc94cd3dc59145ae4c80ce6bec70a877236441. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2203401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752d9b7bffd8c48d7b08aa9370d6f74aab0fa895c069e539298710ba9bb1e191. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKN2C2203402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948131ede19d6e83779646dd7c3acf005dcd6e7067eb5cab6ed703271250a4e. 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/UKN2C2203403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14d04b8af78e6977e4d38238056ed67cad9cee461babc2f04ee7c92d83ecff3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2203404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10b673107dff17101490a2adf1455319a7eb52c9c81f26e6e29a4fede896e30. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2203405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab53c18246c1f39aef9b718fec8153f7e4ceb7581674985aa98960d75f42bd6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2203406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacc3020b4f9c2b983be7e28be308aa67442b67c917ce3f5c94b3ae69d6281a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2203407.
Crazy Cat Lady (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaad6d7e10485a76de27208dc1b0c25f00889cc70c79d43496cbf955dac31771. 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/QZPLR2340170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950b6325abd1777dd513a965aa8f96704d7d1cd63efd3cd793e69a7fbde7e72. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2102905.
Prelude in C Major (After Bach's BWV 846)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e4a229f5628ac49e9f2454e03eec948510847852c99d2bb373110d60b6a80. 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/UKN2C2102808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aa60e3ec72722ae9a50c2a9720ffcf286fea4085b942f992d9cced7b00bfb5. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/UKN2C2102702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f67097ba97dc9f223b99cd52924fd7d945d52f7fc335e6871b68d82435f94d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2102703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bd62cbe23d9aafeab5a7c4e3979116f076b6e9f87e3c6aa511692b92ade1e6. 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/QZFZ71986161.
Man of the Land (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632170810c4100d9dfe1d44a6e6d24acccbee6723b763c7950f61921d7aba758. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKN2C2102804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577fe335046158636fd8c572f7726132a9ce19bbf610c1951891d5823f1569b9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2102810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14314d7260372392186ad97e9ef976a8327dcf45c475aecffe96831306aa922c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKN2C2102902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950b6325abd1777dd513a965aa8f96704d7d1cd63efd3cd793e69a7fbde7e72. 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/UKN2C2102905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5470e9631f3859fdf9052c036c9d72140671e344c234715d395dc549f4886. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKN2C2102906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761cf6a3fed74196ec06a4a2b6b0a75b8bca752fbe3a12c810dd2816bcf56639. 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/UKN2C2102908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335e6e88c1fa2f58fdd265f102dcbfd5b5ff3b241e9d69ec7a0e4075166444dd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN2C2102910.