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 0x5a94e7c6009bd01bf06bebf51cfd97e0a39ab88fed1081ff57babfa24a9a6680. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/912ffff7-2e41-42d1-a00a-06104cb47c1f.json and https://artists.proofprofile.net/proofs/artist/912ffff7-2e41-42d1-a00a-06104cb47c1f.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 0xe1af40bc8ef6b4e5f056ebe2b6774d4fbed399bf63d85843e10bb1c5d2b130b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ021900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d08cae754bfeefdc021b1ba6561e6e5bef4d40b0bd255499455947a817f0e80. 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/FR10S2047231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9d413456fee2d5b8d991f4ca521cafa03644b38fb6264b0e74956ba52d05f. 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/FR10S2047232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a79e464decc471f7e15f24b3f853c04f83456054a7cdad6fbf1ad51039b885b. 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/FR10S2047233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5198be352f6e1c1f03853c115e676c69b3021ddda51e2f92fc4060534900c45. 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/FR10S2047234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c630f09c6cf6c368d2827a5e18596df45e7ca09a2542cb226b13954677e67a. 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/CNZ021900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720016fe250697ca06cfe5233a9754766556c66c44c61d2996000123134f46b. 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/FR10S2047235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a276ac0bf19bd662838084363b6f36985a0d251156c6849ca23a05ca95fc4ab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:16:55Z), 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/TWBR12206093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b0ffdbb57ab6f1140f219464de614c004bbf3ace1cb2dcba25100c7d63678. 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/FRX282225888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3b83f50723f3ecb88a207b13bef1e57e73fc5e450fa1f3ca866fca78a05e5. 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/FRX282225889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661b3eeabd32c4f8c7ba82af80037ba97abe22b47940f62bc791f038c57f399. 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/FRX282225890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31fe7fd1000b5b5b7cb8b5141cc4d04a786e82526a134d41a90901128846ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:22Z), 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/FRX282225892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecd95790cb8172c66b8993d187fe864ed73e3867ab7045fb62059d21c77f6cd. 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/FRX282225893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905cad974994e6e3c53ed556d401f199ea65373f38312d6b833a9770e6404071. 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/FRX282225894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa685a5aa18c9d2ec1315d7aeeba7486a62b655a978d7c2a8535fa31ac22a7e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX282225891.
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 0x9f3b91f8fdc46b908837def6b9cbfc16f9fa041fc477875f50f8cfdd5a4e756b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX282225895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf9d012c90b56b15cd7525419d81746a6adf86f08f5b2b1ecfb052016a6405. 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/FRX282225896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cde0272131e570f2b20ed12fb9ef44c494f1f8e9a3c5ceb044edce5f7fec30. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRX282225897.