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 0x1201e1d39f594dcd494c5a91fcef83c0eb5043d2fc90fc6e9065ebc090d1ec15. 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/12ffbd1c-b5aa-4cd7-b55e-b31e360734c8.json and https://artists.proofprofile.net/proofs/artist/12ffbd1c-b5aa-4cd7-b55e-b31e360734c8.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 0x12ec49fcec973338d69c84cbcc6a036a0fee55ec0572fd66db6be48d0e1ff11e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTAU2351995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d8c5f46ed3c54a36f0d1f997fff16a5e4ee9564210287f8dbbde2d20370670. 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/UKYJJ2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9376f85c9652c5ce24d415622be2dc1e1958bc5470b60416bbe9b926185e88d. 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/QMDA62281025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a25b5a1237f8f0ebfdf133fad926faffd04fa7106be547fb5fb6662ced8711. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2186170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ad9ce11b6c10f63b9277c0b22c55aee3d619027d373fde83564fc9f63f33c. 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/FR96X2516423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b629fc4158e72289b9a58d27f3aa7c71529bbd4834f8141943f548d65fab49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US38Y2569909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf645752ecbe5c58f65651580f4d3cc2b8759e5168b16953ba3775c12b71de61. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282592030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ae10780ba70e64ba78f2c92f7c9b7f6e82f16d9b758a4c689dc1d25bd5589. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ62595410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ab7564cc6dcea105d59ad10f42946d1733d162ba4e5b6c3d62f3d9eead59c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2508945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ff1b7b585503c8ee08ab3b855beab2222b0d32d29ee32f9a9ce2375469051. 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/CA5KR1937878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177aea47c0c5f012bcc3d324a30a2576d1dbb26a9e634a2bc721b2f08df15490. 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/FR59R2249483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6829a5ff7051d8e08af57b2a2ecf999d90cda3a8cb02b5b1b7f5c6534f69cf. 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/FR59R2249490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31afc54ea6448c546fdf0d3bdf86c4663c3afff0852295b8ee7f36213b74768. 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/FR59R2249489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb9fdf45f306a296ca6bb425db9a9419ed530b5d684a9fdc9849cae225c585. 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/DGA0Q2316101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb143c2cb4bedfcd0ba1ed827d428a790afe76faa10a555439c8721997f14be5e. 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/FRX282531133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482af9ff7f91b013b56c533d22e3e51bf34f6a289d048edcb94bf62f8e37cce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA62391471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea46566d84782b07d7323279fa5a7503923e89130370043d194c462cc5f4eef. 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/FRX282531140.