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 0xde0c61573e7a2fe235be8dff651eae75df2a0aeb3a601fe4b1db4a38b65b8ae6. 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/119226d8-7403-4ae9-9412-6e5c2f2d68c9.json and https://artists.proofprofile.net/proofs/artist/119226d8-7403-4ae9-9412-6e5c2f2d68c9.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 0x24b3406155e8cc69a16b4cb0ac892f53a9bdd1b01feae4f92139d8f9836d3573. 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/ES71G2216650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4af774fa5804fcce2271c3e9191368e79b8af91feda929f2f044b7fa6668e1. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ES71G2216651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0091718a2df89d66b37429ac99b74f2530e77f8ad799333a9b861b095e6d5230. 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/ES71G2216652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d5d5968d232d6a471607b46513939f2ed666700cd8dad15c6e3215a7470bf5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2216654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f192e494db4d6ca344fc20eca32f1fa68b0131a3ca610760a784c5496a9c7. 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/COAB11900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe619a58d31219351954a32b9be1e45fb3bf17854cf8371cc08fa29fa459d8d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/COAB11900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfbc2d7d4687dd6d2d686f72a5de7a2c8959607d89e745c220634154ee97ef7. 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/COAB11900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7461d62b2f3ad9d6091a79333ad075275c044634fa2dccd2f1cde47a46789. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/COAB11900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59220756797711f30a967f9e708fd6dab28987293e2ac986fb738319d60c0e. 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/USUM72217129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8fcf292bc825eb1aefe6f98ec1cdb17f6aec48aa402ab56dea4d55591cdb47. 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/USYBL2202140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf952bd0adb33d1fe6f01d0e04b0b7ef2c564aa00876cc3e3eea3dd6cf18ec1. 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/USYBL2202141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8aa683d2021c805bc32aefafaaa5b7e07504e3f7afe78a8a9289088494fb6. 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/ES71G2217671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f9c92d3871318e3781830fc2b5faacf5d22b12e0d3faa99e3debbb12b41a1. 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/UKL4N1700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e708eb5354026ad03603903fd7e9d0be5896f74fbfefb5050256f37d65d98. 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/GBAFL2100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6793868233d1521a66945c0cdae073c7533bbbc389effefa147d6d44f2769df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWDW2303534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6793868233d1521a66945c0cdae073c7533bbbc389effefa147d6d44f2769df. 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/QZWDW2303534.