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 0x0d723966019bc37fdb4f7a204e5b79bed8c9ba7670db3cd8bdcc263a35289fe6. 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/f168f85a-7a82-4bcb-8d72-ed54c6d381be.json and https://artists.proofprofile.net/proofs/artist/f168f85a-7a82-4bcb-8d72-ed54c6d381be.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 0x8a21252963c6ac1a19fed0395538cb24fb7376a08ff9e2505e856b95f902a6a8. 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/TCACJ1520301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad79db796a6567707c60140babf001bd45e51ce1f62566384ba58a3a9561cfd0. 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/TCACJ1520303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33cbf0c7572533260dd98845753a8c9683cbed2f1c7c7120a2310dcd4e6bf1d. 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/TCACJ1520304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f603e859e50616ac6ca7490cf3ba125f9893c1731166b797b170a12f081eacd. 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/TCACJ1520305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed901e5ad9abfef83fe59f71fc34c31b37f24ed7b2d5ccb147054d1b771fe267. 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/TCACJ1520307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64298ba171aac274cc4795f6bee00d9168b7f58239be8fee3d72f0db43e26f01. 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/TCACJ1520308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ffeb3a9404ce7af34d74a06e2b0ca3caebdd7b52cbf7303263ca792dfdff58. 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/TCACJ1520309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff2228a36492cb9a4593446b6b9d9616b0404a897e1619dfc8ebe36fee6e76. 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/TCACJ1520311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe051e2dc7b8dcad70a26d062d2d116370f811efff55773ee797a8f5658a633b4. 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/TCACJ1520312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8b866377445df6d1b98ab1edee7cbbc8ae3e8e78a192c76a2fc9a1a68befdd. 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/TCACJ1520313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e8857fa5db7f8281fd6d825ee70ce748de92270ca395a8a52e27689bd8a99c. 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/TCACS1651838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e84bc923325c40624274aa30c6a9e416f9bf4b6244ac6543bbbad94b734434e. 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/TCACS1651785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f474687ac8a9f0407a2e3e6f3af73d9956468e2d038bce7f061a16d792bb182. 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/TCACS1651787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cfd4900f4f97f5c390476fd8f53b4eaf202ac98e2f76a3a9214a97082f7b42. 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/TCACS1651789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089324c2e4052d7994a4e670f6a1f4adf25c2fd209cdbed99978fb9628b7b846. 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/TCACS1651790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad37b552ba9f142d954fdf91254551d43a1ca023fec2c8b900a8707b6fe28a. 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/TCACS1626366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f43f9585a3d04792f4fb419e50deb53db10724257e9ba6199eee9417ab1f940. 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/QM24S1650141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b6cf9e41b443e9b497cf8474c172c5888de21f980553929f28db672829f75. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZMHM2312430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f2eff525dba3e8376dde367d2bb2dcad9b3848064542f238f45a64aa75e7e. 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/GBARL1600616.