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 0xb0f2f586206b06ecb8e4afc4dbd4753a1bb9a4296832ba8610c66a7ac7143ca2. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8323de88-5e5e-4c9b-a3e1-d4063d6ad55b.json and https://artists.proofprofile.net/proofs/artist/8323de88-5e5e-4c9b-a3e1-d4063d6ad55b.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 0x1d3a4e299a40fee79286e6509f922b1e7a4e5892d254da5af015d0dcf541bb52. 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/UKLDF2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2119fc8d360807cc547a3d347c2d88e01c9b181271cdc935caae2ce19bd5c1af. 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/UKLDF2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00c7a5ed67d836fa6339ad0596dc49e23d48b6b4513dfcafed187a41ebaccb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:05Z), 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/UKLDF2100201.
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 0x7989aa13cc303b0ced8ec05029966ef8a1ba2ea4983a0c4b739b29bd524f71e6. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/UKLDF2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b034dd022586610e287e6529625558ab0e652e417192383b2fe80720017bf. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/UKLDF2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1aa2f5fcf02faa30747b07e193e6794f24c990a05c41d0accbb08052ab000c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKLDF2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56608158411851c0e4d180ac178d32b32d40eba4e3fb27ed4a38959dc23e92b4. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/UKLDF2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac46d69847f9fb455c5c15c2b62e6803c4c2998e1ea921df83f8193c2ca7b7e. 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/UKLDF2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866f3ae1a33a07323b666134b3b0253f36f0d40f92a7d8391709bdee6db2ea9. 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/UKLDF2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd09e6dcd6bd10ac12c3e30e0732a355f6342cdb324f8d52a6dc62f0531eb9. 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/UKFVX1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5a51a51b30ce3a09e549e07226f77a7435024c4890535d952d182c6a22870. 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/UKFVX1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95795db0a44636440a321f1efd36f8c246ae92c5d96510590302c536f1b2f952. 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/UKFVX1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc4147ebf21c43656d7489feb510ca37bbb5c9b3eb45c0fc220d0c8de680b1. 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/UKFVX1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc38b7a0fe6af395ffbdef2f192ffb67dd0adc004bc708a5b55bb046b689b95. 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/UKFVX1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb6ef90f80c2c7868b11efb92554d196cfa35a14f09f1906e1aa687bd3b210c. 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/UKFVX1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e650f11ecd4934f9beba7394468b49b3aeff0299bead8df47e3cffd9d511a2d. 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/UKFVX1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf738e1b95427e09edd431845526a33e67a84370d5e247cdb0b7d1826ccf61fdb. 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/UKFVX1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab359c4b989578df09fb4d772e443945712850079ea125e3ea1a37288b4a310. 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/UKFVX1800019.