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 0x84934895fc9b07bafc2fb7fca0958b623bf8767af34176f7eee22b520e101b95. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73bbcad3-9459-4c52-9d1e-1197834be786.json and https://artists.proofprofile.net/proofs/artist/73bbcad3-9459-4c52-9d1e-1197834be786.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 0xcfd0a5f8807f65df0150ed2c5c3b87f474173d066f140df76bb5ad069c3ceeb3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM71905810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2330f77251ff0f1a85db5ea937436d611ffc94af2b50411c4fbaaa09c18b70ea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEUV71901636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80107bd85ae11b74c9cdb0081723b8ab7665a85cf248717127a5e2871e00424a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:09:01Z), 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/DEUM71905812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d92b57fe6784423a5886dc0ae0851cb0030e40595b14e3ca9673bf1e5b1bd0d. 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/DEUM71905818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb05f76016c52c9501c5c3ab6a923c2bf0515be8d2d163c58169509cc21011e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEUM71905819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267bc3d4b7d7c8ca12fdc674d1e415f2777fc4f6a1c317add41cef98a816fda. 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/DEUM71905807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cb171f23425af63456f08b0fa8492c1a6b17c42213f3e6238aea054a9d0c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUM71905809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd0a5f8807f65df0150ed2c5c3b87f474173d066f140df76bb5ad069c3ceeb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM71905810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d12ea520fb6cd848887c706437210cb514ae34295714b6c7ef489d75f8c78. 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/DEUM71905811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80107bd85ae11b74c9cdb0081723b8ab7665a85cf248717127a5e2871e00424a. 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/DEUM71905812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819946f41a43d4aa4ee3b262b8e03d38d60fc211a77e31f9ccd6af43e940a32. 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/DEUM71905813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f0d1b91e561e47a467ae50a32f84a97572bb8610782e44bd924660a8913624. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DEUM71905814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a161026b4cd9438a2acbe47d15b87fcaf3517467ec810f3c8ecd939fc0b727b. 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/DEUM71905816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ea3d09d8064a74d116f524942899e890d3fa4d93988ad2d29077b1db53810. 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/CH7812195203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cb171f23425af63456f08b0fa8492c1a6b17c42213f3e6238aea054a9d0c0. 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/DEUM71905809.