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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 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 0x74836468a198e30053b4597729c6e013eec80dab2761366e3600e40848ec1b79. 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/505ad7f9-88b3-4767-85a4-ddd2e94b9457.json and https://artists.proofprofile.net/proofs/artist/505ad7f9-88b3-4767-85a4-ddd2e94b9457.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 0x08d8553a23ce8476325f6eaa3c45252a6124c0f5de2f2b7826fcef8757928cd4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE46U1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85d313a42e826cd416d34c08d19c112a1386b31832abe6ca1007251091bd9d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SE46U1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a266ea84c222a878f30c83bb0387238df3065051203ea41d9f6ea956b0dcda. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE46U1500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed02b14495c9bc5ab8c4c4f4e6129e823ac59ecfb61d969b5b7f2e765eded4b2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE46U1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16033bc099fc09a09dd6b2dbcf6d520ec35cb888cdd3c92f7fb8c0d471e8a6b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE46U1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239263a189be29ae6fd0e71112b54c7ca26017e3a872732cf4246f2110647908. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE46U1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67667b901d8b3579ab6758f96a8c2ff814a820d0816def620683b9e9879d52ae. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE46U1600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8c945e45d6f78ab27f7bce2632d929c113b3cb17b82c12f3d991db06d9f1f8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/SE46U2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8c945e45d6f78ab27f7bce2632d929c113b3cb17b82c12f3d991db06d9f1f8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE46U2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5f6ffad8514957b47544d8dc79b43259b89f78d70d4394219c0659e8b7bce5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEVWR2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52338205e8774ac6ffd2d7c0a4a8bf5dab1299642e2a7c0e10fa45e90d79bb. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/SEVWR2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85a6487f1d4f3d425a35ab0e53f38fd07c4f588e58fb1869b96939b1d38e3c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEVWR2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4971f75a26e687ab05ad15a7dc237fbddbfee24fb76d3e9ef784efa5bf274. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE46U2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdecdbb34d3bb6791c8da92974938607f16d3adc9b91a1916fb853167401ce6b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SEVWR2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5f6ffad8514957b47544d8dc79b43259b89f78d70d4394219c0659e8b7bce5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SEVWR2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6f787365f864d84cf28bbf214b3ac2f41c4e59f1afeb4c265d03abc1ad41f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SEVWR2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793096c4c22551e292cce88121672229e7f4b87a2aa2ea4aeb6a60aedc84f9aa. 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/SEVWR2400107.