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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5614c587334b992cb214dd2c8dcd41461da61b4497ee8ad0a1dfc85eae52c2a8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22b6b95-72f7-4d36-8ce9-71117cbf147f.json and https://artists.proofprofile.net/proofs/artist/e22b6b95-72f7-4d36-8ce9-71117cbf147f.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f825c7c1bb6118c810cef7afbc1c9b5d9a4233e9e3f9fca4a267333cc184e73. 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/USZ2F2305701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5dce42fd442da9988f5b87072ea5815d7e771b8f2fc01740997e2b67d1f2d1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USZ2F2305702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466529b3ee9e5b09d607453d4851ccb0c20abd7da120ebf6dff5b96d617a2ee. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USZ2F2305703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754c0a2d51e9afcc8c97d5afabf5d4043fde441b9098b064c626c08f9e53c3d. 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/USZ2F2305704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed15c2744fed0a9ebe407f12cb1835a264e79e9947c6354a97a7cfff20fa6425. 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/USZ2F2305705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d081e0be76abb174e38385220f70acda1cfedd0b65606ed80f93320a1a6b4d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USZ2F2305706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3a2bdaa4cc2989ef9be6ebd2234f2c77e7a8a214dc2921f1634e5982b1e29. 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/USZ2F2305707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52b51081c059450d6848a4a9b300021bff06831c572571561a2b4ae3d61193. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USZ2F2305708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934359c0a106a2186191197c5004b6dc75b902f5de9c3fe6f8be8eb145936d18. 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/USZ2F2305709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430db9179d702cdce2a0fecf58f06bde9b62dbef04afb82ae553aedb6af32d02. 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/USZ2F2305710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875c45f61f55d62e094e017c9b57ca9783c65f0547625cc50ba815fa8cd9f24. 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/USASN1800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246396f216090d79a67fa5a053af3142d803b100f6313b490dc15acec2adc6bf. 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/USASN1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dc65146752e1f260c0b4213f8d261478752249f49dbefb2a894699b5e21786. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USASN1800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe651e20e7ce6a7a47c526f73488b9af7be755fb9b70ec299c569cfadbcb07bd. 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/USASN1800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5217f30696edd43a4342c0231cf9bf0ad7e226194288da23ac005370f7ecc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USASN1800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bb62d53bbdb1ea78aa9b58ae4c25c5c05974f3edb2fad878e56a64ec087bc. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USASN1800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dcb6e67b1a98add587eb1927d2b9853fe3883dce4dddf687c58b6c37239835. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USASN1800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e145f250fd7def72e7a3ff6a861c39698cda5639e3aeda2132a5924583ad171. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USASN1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a17298128ad54b0fece7779ab0da988267690d1647ba1db15d990f9d9ce5f5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USASN1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279a09e872d6509c4b7e69b5283c494b6040c82dcd3707448bb2f5b31e4777a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USASN1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09468ca0b96bc8671ca63541f76666c519380adbc9843245e1d5e3e50f0b7880. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USASN1800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895eecfcd1956a7faba35c2b1463f06a43301881eea61abfe524a19b830aa3e7. 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/USASN1800117.