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 0xda58ee8598fe5448480819a48dbc34ec8e1abd5b3dce54e47bc7b0de9bc24be4. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a331a8e9-74ec-45d8-b45d-ebb60783ec15.json and https://artists.proofprofile.net/proofs/artist/a331a8e9-74ec-45d8-b45d-ebb60783ec15.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 0xb5e9d3736ab12b15bc71825d28b2e8e0a34d04dca3c7e94a9840b6ee2a9ae49e. 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/ATM890300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e9ca3582755f6bc9bca12abecbe8a89e19644afc8d7d45769d5ce68b21988. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATM890300927.
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 0xf71c35b75f72a29aece77ac643fc580e57e7b2cb74c87950684117a6ecb9c99d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ATM890300928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bfaa25b2f46babf42648935c96321c9d5de1e81874cff87040a6473e7ec78a. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ATM890300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa8b5a5e6d30429983a6662c81bb23eee9090889c1ae4638e15252cbb99e41. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATM890300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551ed37dcf83d502f74ec8cf9715f0af19ae8d9cd8214ba2eb7216af0f423c4c. 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/ATM890400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3f20acf6735a17b91af3076a158aaf0bb9bbc76bc4dfffd11063bd65c678f. 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/ATM890400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141919aa2e0765daf2ab29ab8fec363785998b52578b848d389c5e9fd908ef7c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ATM890400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abdfce75b150ff8762c2481083504300763a83b91623ba75487c32393dd3ab5. 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/ATM890400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6bafcbac87b96e89f576550bc3669b1c61e8fd671dab428bf17016f0f943d1. 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/ATM890400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3866fb1cb44876248b920c6dd7155741a790299316af26efc2328a8df200824. 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/ATM890400965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3764b1d4ef34d29a8ee9b25b978243bbe75d3e4474b72291a55c141f74ef11aa. 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/ATM890400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5033bbac6e050c6f572746533bd35bbdcab1c57f2e68bfd4ea649afd7628b282. 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/ATM890400967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507305eaa270963bb78a9a3a6b94b18fa2e92026a68583feb162944d12fa15a6. 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/ATM890400968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc70243641904fa55c73cdd76d67a532d551d37a39a1ed176fbb1ae72fa3475. 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/ATM890400969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e6da6414ce5f3503aaef86eae92db92b04022e73e79445e799d285a2837bf. 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/ATM890400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefff8f3831ef9920410cdff643d0d43571b10efb2a2e1783df1fbf01bdf1a818. 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/ATM890400971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79da8fa9aee83a5200f827f3e551d3fe2057ca7632d746be1ed3b8f2e00aae7a. 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/ATM890400972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de662bd257d24ec9e86974c64f2effba8e8898e0af1f43ed50843729ad5369d. 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/ATM890400973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a04933112927527f7d596c9bb63b31d6cee9cc8fd74921f9fbbb3337061b6f. 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/ATM890400974.