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 0xcbdd31aa50fcdd3cef1324f4a58daab1eaa8130e633bd3b6d9772a15dc66fd24. 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/6f435004-9d87-48d0-a638-9036c473f506.json and https://artists.proofprofile.net/proofs/artist/6f435004-9d87-48d0-a638-9036c473f506.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 0xf51355d3dd09248998d96d8246c41b2d2e3b0ee239975517dca0fd7ad0858b76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1696049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa623526eeca5fb58e786627aa5c2b14316eae55fd5b7b36b092fdea788a8e3ae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1696050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c9f636b031ed3a2faba42373f814b1eb8ee031eb678fa9c8c27e8b57b8faf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1696051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1ee158f241674afcbc15faf30038ee1dd78d05c6b9aa6787bf6ccbe1ffe8e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG1696052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed2ef3bf3c52c3933de67cea2ca0a0c01e3e31fb4daaaa0de997cc407e460a5. 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/US7VG1696058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305829f9700eb1d5f7a7f371b379cedc679b01b8450dd3d9694a3380b49a880. 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/US7VG1696060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15715ee23b302a7903663e79ec3ba9199cc11e267d8ab2eeb1b1c42e301b811d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1696061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f9dbb3904fc328c4d44f61ea88273e19c5473bdbdec0d63aa96adb7f9cf6b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITF252400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d357f24f9bce54afb13605d1befa511f9505671fbf4da14829e82f49cfab1. 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/ITF252300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ad26bbbe1ba0f84746765632f66dd568951d847845b6acc64edbdc6c86e80b. 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/QM4TW1952572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3be60a9213fb328cfa1e0ddfeb9298e5863400401db31134e8b1db4e00c794. 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/QM6P41817170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba88fd8852537571d1908907b90d3eb1a6f7c8e128ea92787c85ce0ca752b5c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:25:49Z), 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/ES09C1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc017532fd1f75eb7ca09669d4c2d24d4853bd20fb362e698ed11403abd8ef3e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA71860147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ccb854d588b593eff4f5db0d705997a8944944daf464dad9fae0d546553a08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1616647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49d1bee6712f6a5eab6ac7b38d8b02480a083b9c8703930267f08d2e5e7afc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1616649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab252c0e481e4971ab6ea437ee4c6e86b5f72353eede0a90c52aaef99ca00ae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1616651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9a42e85cb9175e6d9dec6a7b4a1589d25c7f5dd330274f35ed9ca62bdba40e. 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/QZ5AB1616650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95ab241f07d0a5d7b58a8cd885735da4c852e5c61cc7e29e00bba1f8018341. 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/QZ5AB1616652.