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 0x19d0c14d94419331711c5546f0abbaf9ae3d3bf5ab5995dc36160d9a51201b93. 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/e7838aca-8851-46fa-b71c-5f23cf4719d2.json and https://artists.proofprofile.net/proofs/artist/e7838aca-8851-46fa-b71c-5f23cf4719d2.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 0x488336566cf0dd38ec07dfa78da4a84495a3bf54adf97e9b8b7e3a72cf3231dc. 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/SE4GT1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb33138bacb551496b37ad1783946f3a1ee62c35f5d6c458b471a47178a54de. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SEVSZ1401602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d21b0cb771706a2e7098490efe036a4d0b14490e03b3af8a88da2749a5fee. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:10:50Z), 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/SEVSZ1401606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c971e43f0809bd0ac2d001e2cdbd7bee395b6b04cbeb7fbcf64724553a7c969. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEVSZ1401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167639c1640f164bc96835021b75279ad1b396c5e1a72077305075056ba53c03. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SEVSZ1401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026326498addf65b52524635ce7ab79e12c03a1ee4dc3b24edcad1915f229a52. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEVSZ1401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96781e80d86549418f8e0ee573867568facb91b04e5d372004c9de56dbcab84a. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:02:16Z), 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/SEVSZ1401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270fe9896c76259a2912045ecc64b9b1fb60c90ed45c75a8383c54ef60db8378. 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/SEVSZ1401612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf550cc48bddf3ab8f02abf6552e777e6025efe5f90c06f5911cdf5a90194df05. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:55Z), 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/SEVSZ1401613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9385e0c67b3835624689b4da796384ec4129f5116046012b3af580ffa7bfc3fb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEVTS1500301.