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 0xe70fa74097699d0109ae744cabe4c97d71532a7bb64de79b4e966874e7ccc993. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e90031e5-0713-473a-b7d5-b6f1747e6077.json and https://artists.proofprofile.net/proofs/artist/e90031e5-0713-473a-b7d5-b6f1747e6077.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 0xf32d1ce4e1bfeac262bb627271b45199d94f6cc7979afaf590b02abbefdba687. 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/DK92A1400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a5d3651ef835cbfbd63a604f4cbbae71a8047d42cdc3ce43751a47041b8336. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DK92A1400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5326cae0de7f6c09a8126ef00df36214d3bb6f97afe6216deb308e688e3ba29. 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/DK92A1400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1667e27c369e7ae937612f44b49ca56d0b1be2347d1d9f7b1b328da31949e4a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DK92A1400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef3344b664d44b550278be80179ecf3b1a78ddc78bcb48e805235a16ec1d50e. 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/NONWO0205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d42775765ce1ced8feef92c3fa9f295373bfd1a1f2d8ea62e344439aeffe6b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NONWE0205020.
Det gyldne triangel (feat. Bjarne Brøndbo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5109bed05e93509d871446cc39773b916a7e9a5e02925d96c65af3a569f99c. 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/NONWE0205030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5e204086f65a200ac8b088da7e8de5cac55d567853fcd6f1ba4aea8318af22. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NONWE0205050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb1f419b9cdcc400812205010ba6666c49e80190606faf41ad5fa3ce595fb85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NONWE0205070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd656901ccaf9b12935323b5e87b2ce443f6ccb9747db296ce1b27e6b00a98dc7. 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/NONWE0205100.
Trondheimsnatt (feat. Line Sofie Aleksandersen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d8b4ec5ca84c27522bd90011667d6cb0edb6d33e63ddb7974f0eebf4e89a7c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NONWE0205110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf509e33f3b8644fb8e28e0fdab1100bfde169697335e547ebe30704fa588a. 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/NONWE0205120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853155c1be53506e93d8fd1c9596e8617cedd309c95f1c3a39ddf6921108b2c1. 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/DKV6A1500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f34b2763476c0384f3daf130454f621201a87f967cff6a48e2fba9de4b4c3f. 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/DKI9A0500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec5ae772ca712ef26affea9fd0937c14be28a6403a25a9190a9424ee15247cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKI9A0500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a30e98a6f16b38265cd7f557f2405c72e315265efd371d1989d0b72a42fdd69. 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/DKI9A0500110.