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 0x31bdfab504dddf5cac33c940b743fa51bb1471c3cc919cf96f83e3cc0bac34a7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aaf9c81-9ef8-4eab-a856-a04ad10117a6.json and https://artists.proofprofile.net/proofs/artist/6aaf9c81-9ef8-4eab-a856-a04ad10117a6.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 0x5a26a831a1d79652dafffb8413a1b0a2debeee3f2f3514d39b10262b1d2cb694. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARZAB2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b497708e18294a1d78fd30511058020c7bbfff806e57dd47b499852dfb7d3. 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/ARZAB2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca07d7cc005428d47a41c2f5f3f3c9f06774c4ec4c2547066475ac1a2c3ddee9. 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/ARZAB2500030.
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 0x5daff6ee9dfb5a4b85b692d09d4aab38496e6d4cf8cdf5e964e7747c65293a2f. 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/ARZAB2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f157083082b9c3563291859e219f36ddf04676fcbb8b86dfef17bed366677. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ARZAB2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f640123371aab2043528515bf0e7302e5215af3a533c7c798b95d75c270d7. 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/ARZAB2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986acaa88790a5ef66bf43743bc4ffe9a0f7fec6ab8026b36dcb3d22add9f17b. 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/ARZAB2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06afb2efc42e2368abc6a3f6303d79310cb52081be8b853d2c844f22ecb5e66b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARZAB2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59375f8f43ff5f5caf42adc01cd05dfb99060d4fc6551a6ae89232e8cb96cbf. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ARZAB2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4adefd917bd567aaf7cfd7d347ca23214a2542550cbcd710db978dda94e18d. 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/ARZAB2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b376efa75207362869aed0f2dd16fc95b1359e096bb5f8ba58064a11c25f4ca. 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/ARZAB2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57d5ee6794aaecbcde3dfffabdfa83c2906cd0acc1dc87d754551e5cf40ec12. 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/ARZAB2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa5ad05d40e5464aadb742403ca2a7cd277ef1d692ff4b594ad35630b674d85. 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/ARZAB2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe387645b86a0b9c741bd5eef2945a7bd8eaa033b017401a14fb083bc052936ce. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ARZAB2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5755091fc5863d033a69ce492f411ba34a77c6ede7e94bb01c716070eb6b73f0. 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/ARZAB2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b79802a07d00b5c795afbeb9438bf68225c86096399c485babddc95a93e1bb. 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/ARHXW2302087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733d226a71e50616cf975315133856f6ef9daa388dea63d239350f51386024e. 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/ARHXW2302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab381a54af3a60fd79474c0867053c52c749896f37b55e795924c50264b073f. 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/ARHXW2302093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d38254c416dbcff02967497a36e9a820ad2177c0cc37704b24d7aaec7962c3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ARHXW2302088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416fb9e0326752556b6627daac2db0087b2417758088ebb61fcf1296465772c3. 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/ARHXW2302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79504c6fb425e712f2b750eff0405890e19bb0cbd78d49ab264c82463de405f. 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/ARHXW2302092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1537a80276285aca4d6ff4b80afe723ce0ef0685843dac9b31ace0ab886bd6b9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ARHXW2302094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fa9c935d22bc96b43fe41179b918874b15ac2403a76ca2f2ff0a6eed6606e. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ARHXW2302095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06d7fa037fa109c477d2bac33ab85411f8d5c2774dc6a2878ae502d1d198d9. 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/ARHXW2302096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44708c29bf0c7d35e6f59fef9ac0334f5caee4caac74b17ba4d025553b01cee8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ARHXW2302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d9acf65d6fc4c55f8d511573ec92c93d3606ae4a8c1327967da46677653214. 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/ARHXW2302098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981bf6fa6af04fa27cfdb4537d94a53786bcdfeb07c7641cf7a66465f09ed93. 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/ARHXW2201281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb65650325b2478ef7880ca607330668db28c9edc063933da3b0e4a49c7cd288. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARHXW2201282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d787cca014fbe252c44ad6525981c1eea7e58492960f996b7b8f8a1d2d9ba0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARHXW2201284.
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