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 0xe22bbd1e2afa341af3bc676ae07983c8c0a08304bdd0d965de09bb330759cb4e. 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/367c3ede-73f1-4065-a609-fcf692427782.json and https://artists.proofprofile.net/proofs/artist/367c3ede-73f1-4065-a609-fcf692427782.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 0x491bfcb48192da784879d45731d1cbcf0963610060989c65582cea81b4a7309d. 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/QZK6P2221578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd739ade8bee83c50703055d49608d12fe1e7b2a1fbf8cfa4f26b443bfa0712b0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6P2221573.
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 0x9602d4b96add6a41c8abf32c6ebcc9cb1bd57b5aab152902ff74b195598917ac. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6P2221575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2eeca777d8e1cc876ae6916fe6922dcf616110fe806908d03de026c58645d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6P2221577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300d264f906b68afe94179239ad39568b6c8ded070cec4abc092c5f7658460d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6P2221579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb46ab98eecfec174820fd0089b8c4db47d764d7a00d3a22d2212e0dce83c5a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZK6P2221581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ab04e09bd7c3203d58cead0a0b2aeb84656ccaf948cb8a10eade09d62eeeaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2386110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab8feece16119dea94233c0a7ceeb75dca5f4458d7086d47dc9d3886ddf6b63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEN2386111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019acdad0f389f484db583aaef017a5280cce61640cdea584beaae32b2b7bdf4. 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/QZMEN2386112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320ebbefde16e093162922580e857b28c312a557e66f1f828b82cc40ad15694. 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/QZMEN2386114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d519a7e6137a5efba77b53e166c36c62699c560abde52ee026c06590b026d. 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/QZMEN2386116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5dd7df94adab1be1980221dd101a52d4d109abbd46cde7de657ff30951d6ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2386118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc51cd823e5e0dcfaad57b8b7ed0ea341efd12ebc7fd55007c342aa5979b20. 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/QZK6H2355691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fdb0dac3b84d39b5caf1775c5b43b302735143c380de953928bc22a12a0944. 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/QZK6F2390576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3ca245b7332a297f966039bfc23ced7729511ad03429de429ead3e75dbdeb6. 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/QZMEN2386119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89184f83d9906b386fc2a9fd0df7e45656c461ef8a1a63278534c98dd63612f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2386122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b9baeedcdf7d9035f64725648534ddc8aef81bcb3c468ded50337d7e0314b6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZMEN2386113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7d7bd7ae553e7642c0707d0c67208a6c088ceb82ffb81f6b84f068c7cd121f. 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/QZMEN2386115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ee7a143e70aa238af31d05917cb7f10fff5bdf92d62bedec7462a68f09fdf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZMEN2386117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857afcd474ded727f30e6371fd205dc24e1818db3ee89d0d22560c7d4d2fd61. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMEN2386120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdad71c634263a8d3135fb6c62e06b91b9f6b410566d377c80e5dae367a6c119. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEN2386121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf08827aded484536c686613707bd71f365de5ec18ec42ae9ad2f77fe1b4294. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:53Z), 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/QZDA62570353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700cfb8574a3daeb775eae5670c599720f98c2bd66b8262462d5474461c32993. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2556780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335c221eb55cd6b7ecdd49d8fa8ba7197895dcc81974c65d616c4d7bb57b7cf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7S2559611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53566250015da21a78d3491040eeaa2d9acce533f14ab19b87eba1e0db0c0d3d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ792532724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a43f52e5f105e05bc6b06dd00ad1001c166ea0972b06bc138fc62deb730c33e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7V2547441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e256c16fd8c3fb5fb42657e2d17921004dfc04c456e0ff6b35781d046fbb78. 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/QZHNA2231283.