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 0x6a76a61590a7af795cdf2d3b546f64ffd8794f44c1caf0950d7cc309633f3143. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80cfba19-6493-4066-ab1c-7227eed84a8b.json and https://artists.proofprofile.net/proofs/artist/80cfba19-6493-4066-ab1c-7227eed84a8b.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 0x89fc7c3161f1099f8110c16767a2e8c445ac08c2a27c7d73ff8cf2ce3435205e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:08Z), 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/FR0U91000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1ea50b8d6d0797b78f9315f8c2e6316b70c8ec6181ad511f8d2cff3de3c04c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR0U91000223.
Narkotek Soundsystem:2004-2005 (Best of)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ef370438fbb67cd38042f716edaf951be388cc71d2781d474e60e85d26d78. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR0U91200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41da2b85a1cbed77d6327959b5f634af60fd7d02d0951e79d02deefbff3bc6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0U91200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf19aeee1e34b1da4332eaeb53901d27faf0888422fc97e93cf043b174128529. 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/FR0U91200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379106966e2741a79103e2b0674a1888f69f8658e590892a2f0238d54e7e5bf2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR0U91200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f87bd3be989abb7f75c801c625f1c9caab01cdf559e7ef7a9303628e44bc91. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:40Z), 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/FR0U91601292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc4984be505d91552c5ead2561b5353087e92be39099d50455178b6b8bbeb0e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0U91601294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4834b430e0aa86069e193de3c7745723f29dcc4be17f56da82cbc9b34f8bb2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6541817360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf681aa698070f4a37ebaf938d5d855de4a49d42a70489a76d9eea46b348fd8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:26:23Z), 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/CH6541817361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2df46b19ca38563b15867c016ae7d4357f8e7b80696ef44bf735b47e313f2ea. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:02Z), 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/FR9W11814193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8749bf92b9c8c3a8ecf61b6311295e20ddfb5bf0ed09b6aeb889ea01b90c3e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W11816129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07acf8041766b78cb9e3ba36bf26a9252b028ca245bd1eaf449f2f207d4f524. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W11818656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae38fdfc2afaca0654bb5ce753a8211622d518d1d48970e22f9b3c11691e356. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W11820718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe081bf78ecc5bb4486e1003f12fc1f79e55f23bb4dc332da7a6987d1b9a44d22. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR9W11823248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d8783e971343392b9343f34056be6e8061c364c72065ffaf3c5ba98b3bd1a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W11930423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87f1afa7dee9111565c1a97d7ee13def2d2853ceafa3236a61d9a01f49cb3d. 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/FXQ692100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f977e69ba05ad0c8d81db70d22ae4fc870a4bf05927c3a6a3e712ce704a0a. 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/FXQ692100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d26ab6e108e2074e7d0a5441c4f876ed1e4dfefb2515a2c12c9518825dd219. 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/FXQ692100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae55b0575c4d9bf3b978897170ee0256f76539aa0ad4162560e010d56739eb5f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11904532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3834f98d69fd2cf49de9eae588c85d910066da4d1f681dba40b94f4662f65c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W11912109.
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 0x1e87278bd7b22e1b25a1f48f38be403b760623fc9587a9723b536d5b9336969c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FR9W11902005.