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 0x0653b3738fc567c346d3fcde697191577c0c0759bd6cb546da3bf87f89a18737. 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/2d5ff497-767e-4618-9655-4776f9920e76.json and https://artists.proofprofile.net/proofs/artist/2d5ff497-767e-4618-9655-4776f9920e76.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 0xe9daadace4958b931326be2911811652da85a5db1d932ad3872bbc20bb79a121. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM3DF2166721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5abdb0fb6e065b981a7ddbd0016aae458e6776162939fabd1b712ce2366a01. 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/BCD4N2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c33302728af6a49928d1515f091109cdb8c30451513638130250cc5e246683. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM3DF2169646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa240c584883e35a66ec27552352f35816237f009814f7f347e7e7afe21fbb7. 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/QZPEW2230026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe811e0768aa76ebb733c58da05113d16f88a086450848d064967f5d12f490b6a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMF2220309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb06610553e07fd0d4a22fe196e2dd0a6db4613c23741cba9a34c845b575e443. 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/UKZGC2301839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a98d2d0cf5418998dfacb06c418b3a2cf97346d0f3879436520a9bf1a5ca48. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QM3DF2278279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac2f56362f37ae5b9680967b3920098466c12c33899ecc8c2246f5f72e455c2. 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/QMANG2202637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eed9ccee0ff8e183a690c053de47c85b389b6130d47a063027d2bf7b48cef2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM3DF2294579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ac54c354122c9cfe5e34f88134ef12a694e2adb63bdc66f2b5adb5839b5a0. 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/QM3DF2294580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386cf5e1a3b55dafc2861b254987c79726d337aa821fae2312ba75060e930518. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM3DF2294581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0731aede52c26f1368ba676a400b47a87ca1dfa66c67c2cb4f43f6d67f646. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM3DF2294583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1dadb1e961756d5131984f842651cfd5fdd2a49eeabc2e78d3ad67278539d2. 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/QM3DF2294584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0a351eb42e6a27ba719d961eb72216527ad239f22c3318ac3421f3648f211a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QM3DF2294578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75703c9786316f1fff994493da22cbdce4fbd3e5f9457c6f2e4fc1019c1c313. 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/QM3DF2294593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cecd08aa37376799e4a129a5c24a84342c59f9f1e7e98b1ba3abc81583a6725. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM3DF2294596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba15c7e4c975226fb30968ba68d9b68a200414e0d3acdeb736d8d25ecec93c4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QM3DF2294597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedfc158118e36948e0047042a8121f68ade9f40d86d47e2c4ede840c05c683e. 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/QMANG2228933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00074ae461ea05f3d53a132ec635fe2e8830f03c129715285db43470c35d0e81. 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/QMANG2237333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5a53c650d35ce5499708873e0e496d95ebe003f18b030a53bbee71178e2f1. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/US38Y2309749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6accdeca965afe0326aa09f3347b6f08cfc21349404db9e8eb9d6bd89baaa512. 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/US3DF2418976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f02bd235c7cc0b8cde94d3db89db460cdfedf8ffa5f461d041bd4646c50484. 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/US3DF2467458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fa9f0c244989f30906b2db73cca6dc9206434f1404d552b5c6a112c11476b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF2474298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac43a9da28d79a418b10ee97a806d80407cba501b79bef5bec6813727301f5b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2405977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8fcab0df0f2b2049f6e7ba8760285caba9dbc66e50d9c1ab070849654d9ea. 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/US3DF2498649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b968eb0f2b78ae403123b855963e9942aae4951680ba562c5cdacfea10a87. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM3DF2400841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce81aa8b901fc972fd769fc6d91ae4c8e04e8ee01b3d0262d45ee59d123c0f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2526380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047e0d8f9109ec0200178b932ce16882b4b84160dcff156dc28b9919cdddb245. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE57V2507437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0348127e483e5d96a29d7dc9086fd94769a08b528c8aa2a0f26b7b3e0ae3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMANG2234438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6accdeca965afe0326aa09f3347b6f08cfc21349404db9e8eb9d6bd89baaa512. 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/US3DF2418976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387498d27e913a86f8855f4e25803c5e5835cc69b79c0d7a7a4a5cbac71d7930. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USANG2408589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3546d74761da9b772117bda57f3fd027bb4cbd8c36c45a07c2895dfe06917687. 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/US3DF2469833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5abdb0fb6e065b981a7ddbd0016aae458e6776162939fabd1b712ce2366a01. 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/BCD4N2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68509c9c7883c0826cb13fbfaef7aa7c92bd5bf3390512580051f16cdd8d177. 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/USANG2248495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff1c739ed1fe9d4b3bfbfd73e37570c5f983ce051ee8df3281c4dc3e3f7156b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US3DF2123742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7fc7af7b9b7e82b0885a1d08b3c446d8fba86ed00f83c3ea73e28de99db841. 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/USANG2276975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedfc158118e36948e0047042a8121f68ade9f40d86d47e2c4ede840c05c683e. 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/QMANG2228933.