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 0x25f584bb37723e3f3ce607f5bfc117067d3634d5063cb476895ddfca6306b1bc. 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/4d63aa00-90c8-4980-9023-90b2f7aab1e1.json and https://artists.proofprofile.net/proofs/artist/4d63aa00-90c8-4980-9023-90b2f7aab1e1.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 0xda9324bdee9cc8bf1d77854bca5a1ef72bcbc78bede013e01a6f1b34f777029d. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NOAMM8501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf10a72661c4b6cf88c28dedfe9bf88b239199199c9c05937bce8ac9a91f631. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NOADS9362040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b50ff2e6dde45a5904235ec41eedf506618f5515e5013b7298cc95c9d146ef. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NOUM71100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf8e2b5be600835c48e0c0d41f161899dae0d24c8f0f2ac5f1f07af63b63eb2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NOFST9731020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7aeec2e0d8d62ad73288fc8bce7ab08e57ebf15d130c965624d18a2796b46. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:19Z), 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/NOFST9731040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd630749eea12c343599b278681fe09f03d8e1a3903f24b723966642a921ebf47. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NOFST9731060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9324bdee9cc8bf1d77854bca5a1ef72bcbc78bede013e01a6f1b34f777029d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:51:34Z), 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/NOAMM8501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600d5a85de4e070d06c9da5b71a8fcce52468f90c63e4a1063ef958ec23a855. 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/NOADS9362020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07f11865c8aaa822d4fb7edff87eeed6554f0e4b14debd169ca795ce8b2005. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NOUM70500551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc65fc93be4977ecbeeeebfc1512eff327151c4bc12e9b06b293d2b14c35759. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOUM70702708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeecb6e59f36380fb1cc48c34dd4265ffc15929a8ac25b79cf389a255159248. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NOUM70702710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c5aa214f1ed505bfd6a1698c5eb1d72faf0dfa82c3eca1550ea8a11bab6d1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:48:40Z), 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/NOBWW5801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3621e0e72373a18a7dd12d994e78f7158c4386ea9a98238d795945d309b70f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:54Z), 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/NOBWW0311030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dccf525273f057f2ccfcfdfba698d6624b31bed01e1a0ed7a9d411b76a86444. 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/QMFME1932256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a8709b3b8ef390ddb76c4200530cccaec6eed52d28e3caaa832122ff0c9b21. 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/NOFST9731010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338a9b48c0d4d5d1d30944795d22c4fd0c27b1109a8ca3a3e6715dcf8f5ae70. 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/NOX9X3461404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e227c29d30fafef5392c936f504453f30ecdd5323fc142e28b0d4b462513c04. 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/NOX9X3461413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafedf6fc23362d1bd69aa0e6baa63c5bcfd5f0f225a13a6c704081ff5e23b9. 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/NOX9X3461616.