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 0xf629e827d959e1d92de09cd247e6533f6814cd5565783167dfdddfe219c22eda. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80cbdf54-eaff-4134-a782-6c10de25cf91.json and https://artists.proofprofile.net/proofs/artist/80cbdf54-eaff-4134-a782-6c10de25cf91.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 0xe309128b5e9de6f89f272b1764b993b3164daa0d9df38d40ec88c62c2e25ecee. 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/BXVU32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8f7982fe4758f7f600c250790f6d5ab899f8ffcd5669a93d01af8998354959. 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/BXVU32400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c9e6183d0832fee46e415035962ade74ebbc4e73ed664b01426824cc47cfc. 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/US3DF2402371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4861b17cd3cd2b3d533dc78965669aa1d9cbb834e8b431308f4c0606c7e9951. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BXVU32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6218d4dbf7a06c05f7a9f6837cc6cec90ee3d6701ab93aba38b9a6436d0ca627. 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/BXVU32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2dee5440c536605142dd966da15260baecb2044023440a21094827d7eb2bc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BXVU32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447192b94530a41757080aa3197d8d56d006ec31f3d31db52c0c674d0bb69664. 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/BXVU32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4861b17cd3cd2b3d533dc78965669aa1d9cbb834e8b431308f4c0606c7e9951. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BXVU32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d1e2779703a6ed36862cc36ee93ae97ce82ec02e52f6ba4aedd15515b330e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM3DF2297197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36d47e7edce75835a88b6b623fa0e1b311ebe4408eb8d6ebed262a705f04053. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3DF2296080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7cec3c877768381001943fb14f197cf703e3a32f0f034b2fc71e5e37cb97b4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3DF2296077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70613abbaa17e977add5478e8fc0a8cd764d1cff125a4b795505f9f5e7c984c6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM3DF2297213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36d47e7edce75835a88b6b623fa0e1b311ebe4408eb8d6ebed262a705f04053. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2296080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7cec3c877768381001943fb14f197cf703e3a32f0f034b2fc71e5e37cb97b4. 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/QM3DF2296077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a382069720fc13b919919591cf2e5ff458e323cf4881449d16e8db0ee2c991. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXVU32300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc85d19ec12eaeeaaf1027b17f6c1e71c8f654e532bb2fecae24f06cbf8364d. 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/BXVU32300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d94d9733aa51aabe8f877a2c664eb3b4c28d9351e4f604833e5abe85696674. 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/BXVU32300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d166f5a155dfd0b8f0441ad40ed802228e303f40c9f0a9c40a8e6ccc3cc1aca. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXVU32300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c8e3a804404923e9d95141b20212589f052381959252274fa3df2e67d790e. 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/QZGLM2374849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def3e4257e55136d8313e7055a9d19262983b453427be9fa8b2dec7960a8000. 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/SE6XW2217201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9bb1be51d06c21e83b9795d5346366ee4be96e65b17960964f05329828195e. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BXVU32200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3b1eada1a23cb066e1b2a2d0d72173bf4341a7d616876f47898c6f02cafb7e. 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/BXVU32200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf029677ecc2f7ad6333b4aa31bae8bd6c53cf16528d8ce16243be73c4725e569. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXVU32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fe95983e4bef1ea536bee9a01ade4456376facc390d082f05e3e4c6f497a21. 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/BXVU32100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05e6d423c5a4516801dbbfabd6af48917d367b846cc17f43fc80e71b5c10f8. 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/BXVU32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f860eb328c794abe10071df5ef860f59d9ca5eb81bbc827ed626bfe79213739. 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/BXVU32400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7588831c0650fad01870597602b21837ea3fdaddef7b4f0084cfeb5e9c87fa0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USANG2444271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5f278997781e12b364f4f75a5159cbb9a099be2451acaebbbe5bee33b48dd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2444243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390fce5b286534878ecbd5eed74f01698dafb4a56ce23ebe93cee9469b9aca9f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BXVU32400008.