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 0x63e0222ba94e0415b031c674d11dbc970a7c6c1d8ada80411c8696040ed6be74. 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/0df8f394-023d-461e-bf1c-a3ee6b3ed0c5.json and https://artists.proofprofile.net/proofs/artist/0df8f394-023d-461e-bf1c-a3ee6b3ed0c5.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 0x4c2774330cd4fba2fc0286bae15dba38400dd7b1db5acdf999970d4542c50bce. 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/CHC652200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b0d73c89fd31c5f1b3a79cc0cf9411bed72f004528e7bc44ccfd7ac75ce5f9. 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/CHC652200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c24201d522904e970bd329f231ec1c77e63f41431f39381ed592e9771ad074. 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/CHC652200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f31537d7f606c11b4068753a8c2c3fe0e2a17d3fd2f0b93fd02c393af87cab. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CHC652200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b95bfe57157808b52b57ee45cef49495114693abf0afc0baafcab7db00f1a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEDH72300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1673eb2cbaf93043124c33c996dbd90c3c4067fe8f43d689e06d7f89edced. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEDH72300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e2e86611133c56f9b1f85cb4cc3a5a1c1f145c48fabc907e18ea79bd68169. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEDH72300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b154b04d52016230009aae6facb8786ac2f278a559c73714481a3855abd07f. 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/DEEC31900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bc90810bb2b0db242114a6789fb9650a17f3fd79aa15546dbf902927b63ac5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEH741413452.
Kerberos Revisited - Solomun & Johannes Brecht Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5790680ed7beb0aaffcfa0f9e56c8caccef7fdef49dbf248909be8342810fed8. 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/DEU671703820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefebcb39fb28e2882a9eb488fc06963a7ce61425ec6e8209b7bfc4353e17a56b. 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/QM4TW2428889.
Kreatur der Nacht (feat. Isolation Berlin) (Stimming & Johannes Brecht Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ba330633c14cb462fa6b95fc93830964fa221e1bcac7c515d13cb08cf4039. 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/DELV42201051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ba330633c14cb462fa6b95fc93830964fa221e1bcac7c515d13cb08cf4039. 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/DELV42201051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a5dae7d37bf9c7d99dff5e2c680b7842c3d936eaa3c1529aa88170052771bd. 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/DEDH71230015.
Future Disco, Vol. 8 - Nighttime Networks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dafe715877f3c83c0018cf1ccba574e2fe5e0e4ab8e033c97c5cb0b2462f168. 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/UK6VQ1400011.