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 0x314632bfe78df8c46823b210f1c0ed1b3fdca00a79438f3eb0285dc765eb184c. 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/99702b34-079a-4c6f-a4c7-bc9e63ba85c9.json and https://artists.proofprofile.net/proofs/artist/99702b34-079a-4c6f-a4c7-bc9e63ba85c9.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 0x9b8b5c0fd68b000339c94749414fea246292a6ada6914437ef0e370ed1c8d30c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:19Z), 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/BXIV82030993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3baa1f8c33c4a0f6e44491888803fcb7badb3c20aa7b13288f20cf4886c81df. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:11:21Z), 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/QZW9M2293890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e93c3695a944f826825fea9989c3f5f96f972ef006d76f03df730801e9bf6f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:53:57Z), 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/QZW9M2293884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9604779491016afd31733287db84679abb59e790a3b1bb586315602f667335e. 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/QZW9M2293889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd5c8aa2d4294a24afd0857bcd1b184e855523222ea4776959100097226562. 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/QZNJX2352695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade30acbe264209b05913c20e8794ee131c9686fdfa047ae94a7a44a8d7504b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJW2431160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c37d4db0a433099d8a23d23bf0b26d67edfca41d86e3d76d48660f1fa314ce. 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/QZNJW2431162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bde0361bab08849e9f18213824681092fa7b8f69083f663e05dc91d9e981c6. 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/BCM9A2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde6e4cb81cb80c533714e252f12e27eb1b3e51200f02a6e69aa6e1f77315d6. 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/BX1KG2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2df88290f53024a53edbcddad38a9c5e7de03c21ac7b679409a004a04c35c. 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/BX1KG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b15dc155e6c7dcadddbe8f1a89962ce37c4ef39f5ad523dc48e7fa89aa9e2f. 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/BX1KG2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5786688ed09012cda4a6425859e7a38c13d1ae17857516da805ea6cd40dabedb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXIV82325616.
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