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 0x7a1f7a3ec34ac5e8df0aefe75a8fe55e78eda6c715250ab817f00260f71cf178. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9a500f7-38b8-48ce-9f14-e53200638d96.json and https://artists.proofprofile.net/proofs/artist/d9a500f7-38b8-48ce-9f14-e53200638d96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x4ebe3e4b60fa4aa05bc93fdae0764cd7476c51a82b1efd861d4cf15de79c1086. 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/ITLU51815800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf4de497afc51d3afbab500d1a0736f4c06d8713c96ec036e2bb632feed26e. 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/ITLU51815801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a40bf991e90bb4487ca3e72f8c01419c72a8edbe6a147012a256986f4a35ad. 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/ITLU51815802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5fea6867b73075e06b2ef04b275ba860de4a5e205432bd79b29b3a42c79d21. 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/ITLU51815803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40217bb2e718b7506de25c404cf558f8a6c341cc7ed488ca17dd95d4b897d092. 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/ITLU51815811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf82ff1eba709fcb214bc451fda4b93b5148fbcd91dcfa5f9add9663672cec. 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/ITLU51815814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cde2718af20f514b148cd7404a0185bb73b1428cfb9a920776d878d38c5608e. 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/ITLU51815816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9fd3ae48273a1ff50cc0d0eed80e5c77f65bc0246d2376886b1428e34c49cd. 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/ITLU51815818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f9f62ab622e3c632920a58107f123c862611aef9eba5b2ae53861f050a35e. 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/ITLU51815819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eabb202ee8bd1f36591f7d759efed6a9bf37988b6e72ed04dace970d3bfabd. 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/ITLU51815822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4b655920ee3f0befca3ef371a9f286c5ecdaea7fb3fca53386d1ff9133c48. 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/ITLU51815824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a16d2ad1a31d69f0fd09620d5f3cfb8221d99c8a39ef51211f11cdcf8627e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITLU51815804.
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 0x46c3b2c957af797646a09b210fcb7ad73e4146174c3b54bb5535beb40861977a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITLU51815805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d23921afb9c84ff9934051efedc3f5cf906a9200017c0f60fd1c5569a22f55. 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/ITLU51815806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261d5d3625a8ee778803c10e7dcf5f4454b4eea7e5e5249249d2d5f239ab4f73. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ITLU51815807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813ec9ec4a2ed068eea0f540e82f0c609157a92e6d1320a103b302adf9a17a66. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ITLU51815808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3079bd874472aef5f978bf6b9fe03bc3f4000704755aabbebcf9eb2bdb5db223. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITLU51815809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf942589d283852b75fcf18a62d816bc68e29c202247a148f8a7c5e97731fd89f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ITLU51815810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3c7cffe62872b658c382a58cc3ae7ea6e5dc30f99fd6ce0a0662d605426ee. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITLU51815812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30761478bc9963448cd5d005634a16f5c06feaed11073aaa2bbb14405a33d5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ITLU51815813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bb4958ea16535e9b497de447deb60666abdfe306805d51ee1e1e9cf4fe065e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITLU51815815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcb9b281c0e6f453bf1523a95349da1598c536221658d1adbcc1f93eb15b54. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITLU51815817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604b87c8b5e034d33dc3e1428c5e60bf4c820dc222055a99ed4f9f458b2c338d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITLU51815820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333bf17af5b8f43ce956c7eef5d2aab9371ada1b599c94f56daa5eb5da6a37e4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITLU51815821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda879e024b2d48ea748d773e87d4496afe4021d033cf56b9ea2f339cad51fe71. 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/ITLU51815823.
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