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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 0x444dad44a46586e2163f8943118eebaeae64b7d7d1ca120c4cfba2b993714fb9. 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/d21d9515-07c2-4f4e-9a24-a583adc74f1e.json and https://artists.proofprofile.net/proofs/artist/d21d9515-07c2-4f4e-9a24-a583adc74f1e.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 0xd581301bdf06d3d32f1fbc6295a9384736c706f99af25a8097f088fdd81a3351. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES71962593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f71cfebc701e7befd99678f6addcc04d5a3ec0a4c3dd2d77e55f659d24070e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWW2062654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86348584c3428734d95b3688887b26470217242ba230696657743555ae99cffb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWV32356657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad37a668bb17dc0b7ccb943e81d748ea67c96c4a95cd2d3c90e5e6107e79798. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ8B2327529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f759af762cb1c9a55d6bda386354927e1c215208d7417475fd89200abfe1844. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFZ32401932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1e91d37744a0180ee2df6ddb3ff1c7253e7fa6da6048b359827127a993f115. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWDE2418436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3e9ff7ca5ad0d7c00f751968693ebe3fddf6233c0a473be4d0e87eafa2405. 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/QZWV32444762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde6e5a044927226c8c50e5d113eaf4394bb4cf4cf8a4426df94a3d370f54cb. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZWDE2489674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01067b80dccf6cb67b344bd23caa95c892378b59c86443fd54e50821a11ed96. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ8A2428358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d8396bc3af884a727f71139b0b711222933bd7326d44e4b44a14f85f9d182. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ8A2475102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d8396bc3af884a727f71139b0b711222933bd7326d44e4b44a14f85f9d182. 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/QZZ8A2475102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5dc6ea9b16e411c64049b589f5fced8e356b69afef25843f38732941687e17. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:21Z), 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/QZZ8B2466428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5dc6ea9b16e411c64049b589f5fced8e356b69afef25843f38732941687e17. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZZ8B2466428.