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 0xf22fc9992d125d17a9eef5c297be6780aba9f61aaf5c5cb2ff4fd5fcf25e7962. 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/70a05b30-8231-47fa-9d1c-68abc7d145d6.json and https://artists.proofprofile.net/proofs/artist/70a05b30-8231-47fa-9d1c-68abc7d145d6.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 0x0399506c4a39ad9929ac1f5051a8e6990da6ae61163dc7d28cae4825d53242ca. 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/GBGLW2301094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66654f29a5104599e3e1f6662e0b7c4f5cdd09abd1c91dbae044d611c86dfbc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUM71503511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b225fb8584e12252a4fb90726592815ab11d3a0be3d468fcc7ff9c134599b. 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/DEUM71503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c41553bc0e6a97f1b2081cd06ad279cef5c51be6726e8d97bcd1e93e4a302. 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/DEUM71503513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecdacbe689fcd82b11b504fe666557b8d4cc456913692d6d8ef781ac359c105. 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/DEUM71503514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5d0b58f872ba32f1a84e7585c15b7d8be0a97ce4d04eb8729eed4b33c7d65. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUM71503515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e429a29e40ca9878418f53322780aecaaba3c412ec11693b441f58e244730bf. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEUM71503516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75301a8504c6b5aa7bdfc763b388d602121f030a35bb018ef6e0cc12a951cc49. 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/DEUM71503517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a53aeb18b723ca6aea3ceae5f6b35672fcbb29da25c3ea9625fe5795f33e3. 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/DEUM71501428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bf9d880708ee40203f4a95812aa5adce2de9482580ed560c5a54a209635bb. 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/DEUM71503518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f98ea4671bceb2fc13c7cee6ce9f5ca8d17833ea00218062b043f65fa8041c. 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/DEUM71503519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3418a0f9196e7289ad03e480a9bc6bb82e4147c5be7cf9f44d3a104eea4c93. 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/DEUM71503520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e82e117bcc9b377e2fb34ec86ccd87ce141ef9976275ea6685d319e343a9cff. 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/DEUM71503521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beed29d069fb8024453a220ea185b40a76b1638d81a3b956a73afc10f7ea05c. 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/DEUM72116341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4364b15d0ad11c12951531f6bb0e0170a10f432ecf12f462714e2184e7c3efff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM72100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378b3d7dc6cbe5aaace84b913bef41d84bf490d9665ecb85883b3ea5e9de2ebf. 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/DEUM72311436.