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 0x5180100b5057ee095a5c8a5a1edcf0b02e2dff9d135b14969d4764e618672e9b. 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/8293a0c0-cd33-4fa5-9bf5-d563029e0285.json and https://artists.proofprofile.net/proofs/artist/8293a0c0-cd33-4fa5-9bf5-d563029e0285.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 0x76bb70b008ab543501d445a4c72a6cfc1ec76761652d5c669bbf7ba103baf841. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEA340500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f0bdec674b8abd911bb4cf333addeec4ac7423a0a4ac9ddb9315dd36080af7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEA340500865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60c56531b3cb28637b3597f62c3d29973b2147cbbe3681e90c26dfb6b1dff0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEA340500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d45f2c7b71ce498b2d6c6b6ad9c386e441fed67f1cdbe87ccab65a485a2ec9. 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/DEA340500871.
Lisette und die Krypterianer - Gaudium et felicitas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0b3114caf3b128f83d5fd1636190944bfad663635e7ab53ebe6142445a6e5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEE860300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed4bfbe56cd4f2f5c8db1841c3d71bbe2f921c9eb978ffb707ee78d3def6db. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEE860500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa909d3c38317e78fb00e840c381305d21ac2e25d91f0fc82c466cba1f02c02cd. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/DEA340500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60c56531b3cb28637b3597f62c3d29973b2147cbbe3681e90c26dfb6b1dff0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEA340500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6b1c59c5ecd2461dc2d8403eb10ccdc3f396e04b2473714930a2532cc7fd3e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEC640600336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b7e9aad3a324c17c4d224b00777cacba2d79f8650e17c8a9666239c2075e3. 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/DEC640600339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d73e3075c6e8796a7effb9f961d4cbdfd8b164298add6b996a6149fb213cb3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEC640600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18d4fbc9a860eb1058503e7d40422e776d9405de4219cf541be1e67bb933cdd. 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/DEC640600338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724665cc703ae6f0afc02231bbd93569f4fc6820e1e22aee62ca0daf5c8b686. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEC640600341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b334cdb811d8fc943c55fb4ab617066dd710c768bd0ae46c075191862265d6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DEC610600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c792b9e3d80c80f3f9d196e4c65e7c90b2b01038e27d0478d5fde3d3f2a013c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZC62573752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c78602af60b8703b97a5126e6b6e5c939d4edf13abfa5af5e6a65f010adce. 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/DEZC62579544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6735e48f2267f1c39baec798fadd191b1f460c23ba9595082d560be4d7bc1e2. 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/DEZC62535370.