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 0x24bd9c97530cf1baa1a1bb1a9c72765012d7e3fd745c2e0eeef13a5d84dfb169. 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/d7586538-bdd5-431c-8c5b-ba369a3dea4d.json and https://artists.proofprofile.net/proofs/artist/d7586538-bdd5-431c-8c5b-ba369a3dea4d.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 0xf4d932e849675cab0842bd100a2305d44983aa79a653a9743d2991446364981a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5BU2467706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f5cb225bfcebf058f45b959b7fc8534afad6151d55fa927682029eb90b3302. 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/DE1IK2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a4b686c8c3904359ab79c8f052bc570e82245156baa02e97ce8a3439d68bd. 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/DE1IK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4735226748808d3e069ec293b3f38b17eab92e9183be4f06414dff99513ee01c. 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/DE1IK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf81e0f5089fff1f4ef49d4ef4bac6d01d13935f643e399533019fbf667da4f9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DE1IK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8613f58db812c3584c0593061f8f1f72d9cadfcba755fce622042583b1b099. 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/DE1IK2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddef42c3b24db2327d4f4669bbf3fe09931486eff96c4d3eb26a6069832b736. 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/DE1IK2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f8581faabac483b6a2e3ece9d6551922cae0a16cd941e58684b2e6553825c4. 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/DE1IK2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fc1ccfd3f49fe0f37b616db1281e97576716e4c65b5d7d75226c4055574e3. 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/DE1IK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0edb5838be10ad47a5779fda7d5060b428a1dbdc250d9c105b9f30a722cf30. 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/DE1IK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424b298bafdea39acd9899ac3f275e89ab87b0ad1c599361ad78eed485d99879. 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/DE1IK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ada2f89aa11d69242a1aeb0de26a05ba264c872bd7add15ccf33ba7ec2a70a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DE1IK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4509729e8c6d0d0870e5a5554907ae0788b36b8792558955b7a02df784f135. 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/DE1IK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0e11ec94bd9d72f890f6f953ab5f145c15f2c9c7d2aa332fcd8318d4ef3d1. 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/DE1IK2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddef42c3b24db2327d4f4669bbf3fe09931486eff96c4d3eb26a6069832b736. 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/DE1IK2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fc1ccfd3f49fe0f37b616db1281e97576716e4c65b5d7d75226c4055574e3. 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/DE1IK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4509729e8c6d0d0870e5a5554907ae0788b36b8792558955b7a02df784f135. 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/DE1IK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4329161d83f116ff62eb474a8a621eb45c5d269ed6ed65d2ca44b91725430720. 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/DEKL22000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ab8d2fbecf0ab23bd435deedb978bd64195b779df501f5adf50e656dd2b0bb. 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/DEKL22000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657f21de213addfd8a8babb29dab7897c20847504f692f477e987aa905c46ae4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR96X2127164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fcaa7254bd246bd30efacb1f53d34a9d6443d64a5ac27bb0407ec12df7a5ba. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEKL22000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da359e5043c26d80180eaa894edd9f69b4f21430613fad9644c99383572d9b. 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/DEKL22000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1270849055d08ef528797a386c63ff974b0c17dc2d60eda18fd3bc0740ea980b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEKL22000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df5a2045971483861be2321387b7d3f02c46b87403619abfb504b408cef44c1. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DEOV42401389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe80326c7a4fa72e6e6f4c91303410248b2a719655255ad6a17f8d09d86930e. 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/DEPU32200857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f4fbb63ef5c7e6b3385d987470ca2d1d90e7acb7db860efa4be90c7b497f22. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEPU32200039.
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