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 0xed8cbe30108804fc7747073f4b04a515e67297d5f8e7611193e7af7ff876d975. 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/41033826-4d66-4693-b293-997594aa591f.json and https://artists.proofprofile.net/proofs/artist/41033826-4d66-4693-b293-997594aa591f.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 0xf379a123595e24b06f0f828f672dd4058c6ebc88d5443d8cfe1f6c4573831504. 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/QZW9L2249119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f2d428b995f0dbbc6e02c09b8ed2315249c85318b63877d5a382b377c483f. 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/QZW9L2249120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e345d4628c5b5818f8115120df1c1f78cc4c81848c38e88825b53a6acc53e89. 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/QZW9L2249121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e72223904796da499413510b29bae5ef26108cf299defd8e362aed03d3fc330. 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/QZW9L2249122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c6096d3ed0517b282a44c378acc45e26d1664150edf7e6c7d7a96335034720. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZW9L2249123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c016f6ace7c6765938d53b44219476272370d2130aefdbfc422e5b3400c06. 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/QZTVM2485324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78495b230dd355ca5fcb894f67d93b9a62ec8d589e1e53cc9b718c43204f0401. 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/QZTVM2485327.
Super Sleazy (Igual uma Garota Francesa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3cd165c3577fcc7b22b6262bd9b8eeac89ba7acbb382147bfd07e8ca854f43. 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/QZTVM2485328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3cd165c3577fcc7b22b6262bd9b8eeac89ba7acbb382147bfd07e8ca854f43. 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/QZTVM2485328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c016f6ace7c6765938d53b44219476272370d2130aefdbfc422e5b3400c06. 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/QZTVM2485324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78495b230dd355ca5fcb894f67d93b9a62ec8d589e1e53cc9b718c43204f0401. 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/QZTVM2485327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1affb6cfb5857d36a56ce5c016757338437795ddf9dc66c2e42a6ad0ce009bf. 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/QZNJW2471128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3290cccdd9221a84f08d5fc959aab294c22a6426dc06724e21d3eb2b2e1f397. 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/QZMZ92463887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1affb6cfb5857d36a56ce5c016757338437795ddf9dc66c2e42a6ad0ce009bf. 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/QZNJW2471128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2efb43509b733f596a3415a24ecb324458b837a9387ee938920bbb44b847d8. 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/QZNJW2471130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3cd23583f8533dab2bf1575f26e4d5d139212e5e93e2776a76f0f5f4618024. 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/QZNJV2435906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274920c2157b6619abf989bf33aad7a95a976550095cefc3d1d60ce301eb8704. 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/QZNJW2471133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c907fd660f630a5341bed3dfd0c53c81633905eba6c3d902d2cd6a59b00fc63. 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/QZNJW2471134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c297f282d93300cee1c5f17bd3a3a39264a30daff1625c381bfb62992d66ea. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZW9L2249124.
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