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 0x46d2c417934766f47c7d820905a85cda2894e9f7c506d608d02c5829bc8e7dcf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca08452a-669d-4a27-b185-3f6b1bae01c0.json and https://artists.proofprofile.net/proofs/artist/ca08452a-669d-4a27-b185-3f6b1bae01c0.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 0xa1e32822c882930708d9cf49c04117377e5551dca9afae2e7cfcd8d2a5a27da2. 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/US7VG2113537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221f6786dc7bec08f23b28358e908f49962682bdff13c306527bbf3a65e36b10. 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/QZ5AB2317619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15466f825e9180d19eac68bdd01b43e3829abd638dda9aad84c75b57b62ad8b7. 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/QZ5AB2317620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc56e948067adf7a6f59a513c5e6dd18425b6753d537748c0e6a51eb14e90f. 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/QZ5AB2317621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c5dce18726b57f1c09792aea0bbe79bcd8955047c9a4c53e770ced90d48f32. 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/QZ5AB2317622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e70690deff31471adf64f605df2459dba1b17eaf37f957df8770917ddab01a3. 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/QZ5AB2317623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad646fc42ed17c9658d22b4b1df5c91cb930a02cfd1d6ac7e697aaab7274ae6c. 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/QZ5AB2317624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d9f95fc54dbed6b35497af4db5bf313468bf3b09b7b0d9708189e155a3d402. 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/QZ5AB2317625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66904cc5340952987517d951b34a0abaad0e5e4cecc3a264715e228935c5f7be. 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/QZ5AB2317626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4176b4954e9504b0e5290beeaf407feb44102f3dfca1e95655b8997b3bdca6. 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/US7VG2431823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b0c266ea61353dbb8f635d467436db5482a6ce457827a828e05f76cd32f690. 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/US7VG2431824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694710fcad7ed29c5eee2c594edc54c6f5d86d738f6290c2cd7ed3b1345b5429. 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/US7VG2431825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c0d524fb3d90ceff754fefc59c612c321b3b353fd9476d4f52ae61ff4e73e9. 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/US7VG2431826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc54aa733c0c55adad86410e3933e3fe4ff4ed53d8603a0925a7a0ccc459efd. 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/US7VG2431827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547674102958aff9f0781f5b4d1b745923b0add7ed0f2bd51be1a0f75c693d99. 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/US7VG2431829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d6fe7202d4f01f12e66170ef24c969832afac700fcfa8f478b27d295873d03. 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/QZNJW2270388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbee140ef7e3d1b85e70857aaa2771b40a14960e17d5739123d45cc8599a897a. 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/QZNJW2270387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd9e3de62757f11fba89d0db01d88a3720a1677fc00261a4ca5564336b0ba3. 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/QZNJW2270389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74715e5e44bc2f3d49f705d4482a26251af76653ad22c268185bf9e4d8acabcf. 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/QZNJW2270390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c4ad55f7ec57f7b8f7ea6635c183a2292364a45e50a0fe0a89b75a0d40de4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:13Z), 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/US7VG2431828.
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