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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 0xe6d5558c9401eac8fe7ef1693f9a238f686a24876301001f0131de805b1f0d33. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3751cb36-0a17-4d49-9a36-07b9394e91d5.json and https://artists.proofprofile.net/proofs/artist/3751cb36-0a17-4d49-9a36-07b9394e91d5.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 0x2dbd938b615b89740b302c68afff1fece55b02acee86069b5c3799507bdc2758. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJJ2530016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc128b567efe37d065c879aa634a3e5c47022988300375698c04e4f82af24ee7. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAJK2530066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a2a2f1f133fe6a7827f45ef5297c32c367e833d7ad821ff2cd67cb9cd0b7b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:05Z), 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/TCAJJ2530061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f30a83b7e557967047f4756bd7f92f3534d3ba1a0028d1590d00db3e420d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJJ2530044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312ba8356ba6afc79bc9662f0e6e2297ae6937448336e92fd6563ad5fb2dcdcc. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJJ2530049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4580b8207949680fd53b2165ace48964876856a97527978edc251e22ce6ae0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:43Z), 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/TCAJJ2530034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ff3ce4dfa7b06df9eedfae11d722ca5e12172a4b5b252c8a1b5cda9ec2931. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJJ2529980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221070df6900cbb209ff7a001c70ed3f63b252e8b3ca91c0671d6eadc3c541d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJJ2530073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7e55c68c9b9403d37f01b0a76a82fc93a1ee265b45caefc47ba2e2973bdf6. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJJ2530032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84cff004b01a700a54ee806016609eb586007510b9bb4308c6d736e6553edc. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/TCAJJ2529989.