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 0x48eb7b2abdae8628fd5e638d3cdf8eecb87c5bc7f0632f22b533b3ebc29812c3. 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/443fbc26-935a-4396-bbb7-abae75730636.json and https://artists.proofprofile.net/proofs/artist/443fbc26-935a-4396-bbb7-abae75730636.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 0x8cd721552cb4ee83eff44bbc4dde946cc56d95dc37fc49336ddf6313c684505d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:18:47Z), 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/NLU6B1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b25a34687703acebc98ccf26776ef45b07f54c7df5c5911034bf8597bcd8b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:39Z), 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/NLU6B1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d0418ea67cc0e2a61209bd88e3d9159b66dfdd93d956b31d662a1e02195e89. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NLU6B1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee316a039ae2dd48af3f4d5a37a42d5415ccd27671602fd3764d8c0e17ef756. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLU6B1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a764eb3777dd550e1454de6508d1a08529020660dc00f090cc7fdf656cac167. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:54Z), 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/NLU6B1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43db370e425391cf263c5290812ae7704592d8f56c8d5241dd1bc3065d737e34. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/NLU6B1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3d46478582d1dfc36b4613fcd3f80d3e82c0f9f050e51cfa0c2d8cb3cc2d5a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NLU6B1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecd319d6b12dddf6a98e3d3c41589d9f55518fd0bf9a16703636636939d680e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLU6B1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a8c9c72abc189d1831d2217de4264eb6f4988188d2de6a4ded3507bcf0952. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NLU6B1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f25fe86beb3601b27e3137406923acebc041591b8ac8066eaaed6d9e2892d. 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/DEPI82400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99e495f12e04428fde1446c3e1e48068323269079ed29482ba33d02a6090cbe. 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/DEPI82321959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da13d76e6e2609aa0326c466760d39a11621030a2978cf16f1c8e8ac7fb0c21. 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/DEPI82400800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042aedfc6e2c1bca43587b99438290b1048370d1e15befcbafcababf5427d4e. 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/DEPI82400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b72703e52cb30f539e522969369efcf21b6941bbae6a0354ca7d85cf0a94d7e. 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/DEPI82400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ba37d41e725c8ccd74d12e6b25556ef6ad8c0eb42c85111c7f60ba7edfd0a1. 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/DEPI82400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94f154ad0a957d7c5ac496bbb0e9c9b3c13f4b80e82e2efac36f8b18d8d6d4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEPI82324139.
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 0x28623028b0b26324d8f52a0e895a4aef750465f53166c19488411f3cee9a0fca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82400797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa964649519abd7e1702b080fa1d0e0d61d4ae917b104723b49b21161497aec35. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEPI82400799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdbcb253d3e980cc67e5c663b3c3ad17802348caf3fc96497aca1e9a145c071. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEPI82400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74997f00955b8427c57fcc9aeea0ebc2002e56e4b2f0481dc7bfb9a57f4712c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEPI82512439.