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 0x808fcb0ddb71a5382e1a61ec102ef535af9f3fa02405cb92681ebcf56a5415c4. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/805877f3-6640-42ef-b42d-8dc00bb96a9b.json and https://artists.proofprofile.net/proofs/artist/805877f3-6640-42ef-b42d-8dc00bb96a9b.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 0x9aa3d4185c2fcad4394e54292ff8e4e48d554420bdde12bd8842757c9afa41dd. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USXG92400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa862d0e6bcd6498a4dc09d9b17fc325aa149b2c1c38b420a02e9e240b79f1107. 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/QM6MZ2451239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec68fb29bb4d98e176f36a7fa7ae80af0ceec6d787d0254285408f81d110c2. 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/QM6MZ2401807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71579aa5a943941dcea5f7f788380d1a6e6aea467d1ec3071a0d2b39bdcae7ad. 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/QM24S2400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38a455faea2db1fb7b58c7d453b30e0eb8e81ee8d33143d65c99c9bd5a7d77e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX2458977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f65e0782ca67298bb36c3516808c0223b4a80a4a3b8fdf7254af837b879c80d. 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/QM4TW2472995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435c94b00876653daba07739749d5b4030a50c170b47bd1e17f88fb1c8f69dc2. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/QM4TW2443294.
We Loved With a Love That was More Than Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2f5ebfd3e7d6f880e1e4d867fca7c86241fcb2189ec3900fb36376b85d2696. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QMFMG2378201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809f2e4f31a2ec966a53e85ff997863ac5cadea6418e64825b72ec0ae572518c. 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/QMFMG2305192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970863e0e2b0e95712dda21324eb35c1de212763f6b1958ed51bff617b19ea5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMDA72365106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063263165944a6e30948e2cf58a74ef76621a51e965a5f528b20ab9d48d8ae2. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMDA62362312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546abb85790458e758bccc8dce27082f6be771590820c96f064021a30c5ea6a4. 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/USXG92300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4209f79278c36f66d33d0a3f7ba853cdf948defd98a035d5a8ca54cd82505e4c. 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/QM24S2203650.