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 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 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 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 0x24503eadf97923cc2302d4171bc2f60d565461e980de44a58162ae0065829a5a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6Q2279446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c849a3fc14a330689b8043b81b08b62e64bd18f8d3309c1bcdf41a1a80d20ec. 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/QZK6Q2279449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589a024a20da3402da59c9bd7ac93692961f385cc7fbb48a848dd7eb46f84a5. 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/QZK6Q2279451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223e0d87eb2a2ea72182cc07f9501d6d0e9198a495e05af3f3079d3a2016517. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZNWQ2098815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a084580731fa75c4e56156a9081548319535380cbe36a698cf0ccee9dfbffd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWQ2098818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442b3e33620813aa9f6e893ffcd088c798b9fa601bc5ead253c4f621b43866f3. 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/QZNWQ2098819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca0dcb53d0ced172b59339d00248f117043079286efa031d2049f8d73224528. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZFZ72236258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b35a7b995010ed7487d499b7c5385a9fc60983a5483db90844c0cf97598010. 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/QZNWY2006555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baca552946a368ab7b411eca63591bc9783f8d3a1021cfdd2177a367d2f23ce. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWY2006559.
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 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/QZFZ72115145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f46402218dde46117dee4a9845d66d4947fc0ebc0bca154de8298193c96d8e. 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/QZFZ72115149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6b75868e8e90e7fd1a1e9cf7ecdbc8e553982ffb8957b57394b735d95f7293. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZDA52185535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d9ec6a4c4780fefd22f3125543b8c03a657a9416e1f0021c804a9880fb751. 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/QZDA52185540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e269a0ca56567cafede79565b3e1a11cf1b743bcd4d42e34c0194ef343edd42. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZDA52185541.
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 0x2b78b3749ac39d9da9d8c9fe3d388e5d78733a60e8bc70042b1aaf310de12c8d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA82175737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf1548951ec653d45c6f2d72b3e6a6ac7a02453a24e6186a1a6945f28e06e9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZDA82175739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e688da319aa34deb049033c171e5a4d636e3974680e0087d414f8baf9149e57. 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/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 0xd65c31a8cc9f3249e17510e8740e52023f91de6ac4bd933d52010a2a50794255. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6K2132280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8500f9705ef865147d0c2bfd278f7b350315cdf023215d1bfacca6f951803a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6K2132282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7884cdec058bb4d6a61f05558438fa375abc2343a96e6983c19df0d0f897423d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZDA52185536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32dcc621b339b949f855ace4f63e932c6da3c2db8057c2abd506ea1f5ee3e2f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZK6N2274333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdf497fd1f75991b8b615350ed07e1f83a2d851f1be410865af1f2b01cf96a5. 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/QZK6N2201828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64fe15fcc2dd3bf6926f0775beb0f3981b270d9390c898581d08b928a40ee55. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWY2006551.
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 (2026-07-19T15:36:35Z), 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 (2026-07-19T16:12:29Z), 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 0x88c870e041f90c4ea2386fcd352747a5d59755b2609c6ceb8c417f578e7a07dd. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZK6K2132279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fed1ec1c4deaf714f7a4922bdd0e84f298ddad1b15a327ec35d269e5b30743. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNWR2121917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3473dcab7fb36d4dc14245ce66d336b2d05166d0ee637ce4bde9ee9605a13faa. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZNWR2121913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8391859f66528b2e821922744bf43a56b784cde24d191191e061a8a2a4efeac. 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/QZFZ72115147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d5a5882dff8d3b064353faaed0a0a4504af2932bf74b8b48c231057ab6c1f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA52185542.
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