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 0x98b0d5cc014bfe2b16348136b0b19cf2d8faf5b7c1ed1997a4334c2d6aaaceac. 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/e1d496c1-7b7b-4dbb-8e4d-8da7ac37b8f6.json and https://artists.proofprofile.net/proofs/artist/e1d496c1-7b7b-4dbb-8e4d-8da7ac37b8f6.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 0xbf85ffd60ab6f198fac098d37acbf0c56bea8f5767152205bb111a65f82756db. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PL87E1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc417806c161730b5e23232ede9645713fffa2e0a5294f191e1c1d4c830d2489. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:39Z), 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/PL87E1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e131ae1f1dbd82953fd27029e873e7ee9306293d1cedda95b54379ead2d7980. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PL87E1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc222a0c5cf909afd5fd30988745f325471436e776b3fd7df7c259852b0476922. 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/PL87E1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dadee23d418d875fa007d3be1aa62d08d6c5d781f5ff4ebe06daa8def1cac8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL87E1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092842ccdf00a54a2544eaf56cbb6af826af3e756616443356772fd9a33ae626. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/PLB171001444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5527b9047ec9ecb767d52044cda1bafe52e6f049ea0b99c458e851788a1c51c. 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/PL87E1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c8d4ccadd211ccc6b58ca56bb2164472795534ebf6e0f0149b88b21eb5147b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:02:48Z), 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/PL87E1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3588e9ba9f39edbdc376f0f9491131ec8a4769087ae93609df522c55991e3256. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/PL87E1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3571cd8d0e2af15b9eb1bf664af9c0b56776efa08cf95d44d2b3479bf1050fc9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/PL87E1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39569f1f1932ce10d90f18c1c957530f22768e7c5e2aa7738f3321cb6b215b. 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/PL87E1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6320b30605a9cb8abd308a7de65537c16f8b1bbbd142d0dbe2bbccb3d1817b. 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/PL87E1900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310d6586a47671d543e70aca8372f589a99aad8560a1bced3e69e6432b945a17. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:19:26Z), 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/PL87E1900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93ce5a76e4068e8b74287cd29765bddfd0f737fc67f7c3c8fbd488eee0c5661. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PL87E1900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04305db82a8014b024827a1eb61a1d98d6e84d31107b440b149b80b00c97a676. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL87E1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de02ba3ccfd8cb611bb8c539d46a2ebcb2d0dcdd882b496cd2fbd10a385e19a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PL87E1900094.