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 0xb167c31fbb05eb87727365990083e765ede8be2eb80c416fa6d5689dcd30a865. 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/f2b6fd04-f619-4743-a9a2-b587272e1b3b.json and https://artists.proofprofile.net/proofs/artist/f2b6fd04-f619-4743-a9a2-b587272e1b3b.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 0xce3fffca09bb13190942b821a2dca86d5d35e9662ad19dad23fae5a0c116865b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NZUC09505001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8b0afa1be9ad81b7c8ec0d9efb5734b3b90e54be148fab617b298474c99f9f. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/NZUC09505006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5329ba1730e84d740c2f7137418d4858035106fe87801b0c09e522f26b9a1c20. 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/NZUC09505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e326ec52dd8b49d2abacf8273ff00c6c666b9e7dc51f7dc1f2afa201f41b24. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:53:22Z), 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/NZUC09505102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53337b38019b82e65e90cc645d17a03bc9b21bc64afac9af1d41470ce9fa1145. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NZUC09505103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a6b0dc511c5761b104824b18cdd2cfb713d8f365f91ffab6a1b5f6572b4a33. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:52Z), 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/NZUC09505109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaa0277548376b0b20fca5e2941937cfcdfa7e54c196b8228c2c808f5ddbeff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NZUC00304605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1df2715eeb18371fec7e3194d6dc8e4450a525fd8d5e93f7342788ceb16219. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:48Z), 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/NZUC00304610.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9864fd9fc00a9726b59105a62cea020b2f07c61cbea8a95e01440bbf3eacbbfb. 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/NZUC01109101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c67450b0f6dcae76dbc4c48f89bc3bc394e45243eb9c63299260952140eeb3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:00:46Z), 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/NZUC01109115.