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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 0x84117f3002bdc68100444addd29b405fd9c9ef9068a45cf229c6bb0e0891e8ef. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c87cf5dc-4844-4443-aa7e-1fafebb179f5.json and https://artists.proofprofile.net/proofs/artist/c87cf5dc-4844-4443-aa7e-1fafebb179f5.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 0x938712b5d2be6dc1b9411d6f1f0e86868332f2ff5886773da844f12a68e460da. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/USN681410082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc581c48925b874babfc2313e511e1393a480223c502f98467b1f6ea4582a5ea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:04Z), 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/USN681410083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604bd36206fe0ea57acf042d219fe98a74148f21892c965a831f47b8e250e84. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:44Z), 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/USJE71410038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d9842a69ee9febfe89112931f29ef6dc8089cfee708f36b34707ccddf09be6. 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/USN681610036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3236989ff8eb1cc8f6b9308a5fa9ec4552f91044381691e9be0716259add22f. 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/USN681610037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b8daffb2893885b084ef4c8400d9ae429a1a5c33ffd58cf74fb3f3f4069e8c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USN681710003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2265a994a4b742d5ad24f448f3f5289aadddaf7be5c4fed331bc71a16b41e563. 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/USN681710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2265a994a4b742d5ad24f448f3f5289aadddaf7be5c4fed331bc71a16b41e563. 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/USN681710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7132aef444d149ee9161fba8f791833a5fb7d532f4af3e1dec7a3eea88de7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:19Z), 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/USN681710005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e174730405458231fa2bdb59094651c098e2ef92a1d58c666671f86e49dd44. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USN681710006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5382cc56591f6fd1affbded6cbbcd17d784784cb847f474ba7e55cc75a7386f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:14Z), 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/USN681710007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324d6130e62099476d961af8565604cb2b6611b38a02d7d63a371e4719508aec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:50:01Z), 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/USN681800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148c929cc4a09600e2bb81c572e5a4d569c250eb9def5032e31ec43b8915c384. 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/DED831800423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00826e1ea8f781158213565fdf070253a140fbd35a6975320a591ddd653c98f9. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:23:27Z), 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/DED832000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024f6c8ffd8754130a1d5159ee4e373e5d786b1d60600433f3672d28777a836. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DED832000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583357556417db2f4ee88dddeba702bae807c4592656dd8aebc883cfe69b34b6. 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/DED832000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff7472cbe62797d23879b0c1992c93589337a86df81118ead42e3db7427773. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DED832000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9def777c4126ddf76239f34087c05b84d8c1452f27ebd6c22a519959a140272. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DED832300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5083eb9bf16add365e77e167a09283e9eac7b62a69997ded014d8b98fcf6e3. 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/DEZ902000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d5fb7d2a36d927b6c5b143d41662822ed5f52d410e9ef35fdbf9ee3def28ac. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6MZ1818204.
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