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 0x6caf3fe7822c112c4bcbab2f2327c68fe796f5273d43f935b61bd027aa0606be. 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/5328cb6e-83c9-46ff-83db-9794385465d4.json and https://artists.proofprofile.net/proofs/artist/5328cb6e-83c9-46ff-83db-9794385465d4.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 0xff9c5ca228a4aa5149c088f7d51f6096db249cf044fcd89091c32a0b0236c6ee. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:02Z), 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/NZPB12203598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9879750680e47cc992705d1477db13a0bd8e046c134c4b7e450f01b2e927cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NZPB12203601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a36cd8499f79d0ccbf42fe2457113d50cf58b4a9767d3fcdc2bce756df8f95. 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/NZPB12203605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c010420dcaeadba0e2442507f190165e2f8fb0fdebf707afde0dde58819322. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NZPB12203606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d7d92efddee307488ebc639992346faa26c6f164d3abe45a19f7f6832fc2fa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:49Z), 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/NZPB12203608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b2e3757701a00ac4128aa2ffd6ec85b3ca08c93e37c409af39d249ea7d09e3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NZPB12203614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe768fbfeac87d958acdfd312458cbaf912bef6a102287a6224c6011e01b11106. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/NZPB12203620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8897ee6f3902fa0cb795ac34f7cdfb21ea10e2396ca63772862597080d7ec53d. 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/NZAM02002651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cfd4e3ec9385a7f2fde89908fc227f5de00b5c35e423f9c95e63d6c2edf3e2. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:20Z), 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/QZKSK2150567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367aa95d49758484a24c728a98b7f1b181731755dc2428820cb9598d60515b8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NZPB12300343.
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