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 0x668505bd7bd4ee23ffd9b0c43e76ac17dcb5b3717f896cfe07a042fb6a00b5aa. 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/0b72340e-8901-4d8e-acc8-7958e662cd1e.json and https://artists.proofprofile.net/proofs/artist/0b72340e-8901-4d8e-acc8-7958e662cd1e.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 0xc64ff714a4876e3bd416f1d5cb22318090691e307ad08c8e70b6bb8993b8f966. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBKPL2212939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa428e18bc7be78bf05fd596037d5fa0acfae533707e4672e713c94dadc519ea1. 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/NLRD52273687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ff714a4876e3bd416f1d5cb22318090691e307ad08c8e70b6bb8993b8f966. 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/GBKPL2212939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1982538a6cf1ecb719f52c9850e1fefa5f07095eb3fb5abfabb3c9835b9f30. 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/GBKPL2294763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb326083ca348933bde31dabb2b3d1e132757328648ceaa32d2e4bc6329f6f5c. 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/GBKPL2081527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55cb6c9ce44c1653f07e5f9cafb65c8b89c21bc4943dd92453c92b11aa667a. 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/GBKPL2298388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf275e319ef7715499d135e5713683957ba1b196088718b430a79c36abd8d224. 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/GBKPL2202009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36fabe0f62eda23375a4c150e15faa0e875d915854d1624e89b7b8f9c58490a. 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/GBKPL2202008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e55cb6c9ce44c1653f07e5f9cafb65c8b89c21bc4943dd92453c92b11aa667a. 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/GBKPL2298388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1982538a6cf1ecb719f52c9850e1fefa5f07095eb3fb5abfabb3c9835b9f30. 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/GBKPL2294763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df3e3abdcd17597961c0c720b86db34be8cbc5db08bfb7e01e05c22b6bba02. 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/GBKPL2036001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017c1516f1c8934839a5c84f3d8a50af246e6d400c97e2ec0e68418d4098036. 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/AUCN32000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb326083ca348933bde31dabb2b3d1e132757328648ceaa32d2e4bc6329f6f5c. 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/GBKPL2081527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe966e7165d28d0536ee5875832d33a139455cb527cea77b58fac8847532810a2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBKPL2081528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7626dffb0c72c0967baad6fcc50bac4e57e6496f6c2797d5833ac73c646bc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBKPL1972965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e22078e88e3f592ac9dd04015c7195035bccffc6cbc5e71a3e6d5fbae419de. 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/GBKPL1947927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0b550a019a7a845d1cdb1eb335a331b9a2cf1245fa8ade1f80c7635b8867f3. 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/NLT2H2401443.