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 0x47cc494bfef7c2cc01a413394877abf5abf4790afacbd58bf5d128c38f9007b9. 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/06bb6758-f6bf-4ac4-8e0e-131cec9d8f9a.json and https://artists.proofprofile.net/proofs/artist/06bb6758-f6bf-4ac4-8e0e-131cec9d8f9a.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 0x442b3e33620813aa9f6e893ffcd088c798b9fa601bc5ead253c4f621b43866f3. 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/QZNWQ2098819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b35a7b995010ed7487d499b7c5385a9fc60983a5483db90844c0cf97598010. 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/QZNWY2006555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c1410dd19aa246082b0a67034429266bb8af5a7abe219365e5daaada1b438e. 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/QZNWY2006562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899aee60049bf6e599b2cb75cf09bd9f726510b129ad3fa6da66a247164f1495. 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/QZFZ72115145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f46402218dde46117dee4a9845d66d4947fc0ebc0bca154de8298193c96d8e. 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/QZFZ72115149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d9ec6a4c4780fefd22f3125543b8c03a657a9416e1f0021c804a9880fb751. 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/QZDA52185540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff5856f453715a747590fdb4d7d44ce112addae4067e71c8de11e5015531a14. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZDA52185543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf044237f1125c33017911fff96b2b964dfcf919ad2c8b58868016a2670b9b5b4. 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/QZDA82175735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f087942d551a1b05bb8494bd7e215ac58da094f7f79e2b48018b5222734efd. 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/QZDA82175736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e688da319aa34deb049033c171e5a4d636e3974680e0087d414f8baf9149e57. 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/QZDA82175741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6dab03e69835bfd20d2d88daa830d99935b8a7e7c8784ff79ac1eb29a67bd. 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/QZK6K2132275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0932c1861568ad34823fe44d39e45d66488874bfac209baabefff1e8c0e3db67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6K2132276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdf497fd1f75991b8b615350ed07e1f83a2d851f1be410865af1f2b01cf96a5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6N2201828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745edb8945e85d56d508e81e13a5f36433602e0f3c825c37842cccde2df98f2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEM2044234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b36d70fef75132ff9a9f0d69b5180a3034db42e65ed40a180123c96c6cceb8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:19:31Z), 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/QZDA52185538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d901cbffd3797c53dedafec7136d227f3724f0cdcd37711a7bf20e962ee25c7. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:43Z), 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/QZK6N2296930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8391859f66528b2e821922744bf43a56b784cde24d191191e061a8a2a4efeac. 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/QZFZ72115147.
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