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 0x6435cb3bb307485d7815e6e7d5ea34a3b0862cb15f7eda942dd3852ef8c8c1cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18140a1b-0021-4476-a50c-7444a92f89a6.json and https://artists.proofprofile.net/proofs/artist/18140a1b-0021-4476-a50c-7444a92f89a6.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 0x3c1a484b2b407e888250903d5956dcd4130ef906d24816109759d92e88ed2dbf. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:02Z), 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/TCJPO2163871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab918d033e5e8c3ebc5395975a338d6859442a3f2f653538ca220aff6bf6a5a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPQ2148338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81d3ac876a9c2bdc65f966728830bbc6cf821ca441861ee256ca319ddb00dcf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:04Z), 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/TCJPQ2148340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468bdc42d62c60193907c8e977bac0047d3fccf31398680f3c3f1e6927352a39. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPQ2148342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab918d033e5e8c3ebc5395975a338d6859442a3f2f653538ca220aff6bf6a5a8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPQ2148338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81d3ac876a9c2bdc65f966728830bbc6cf821ca441861ee256ca319ddb00dcf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPQ2148340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468bdc42d62c60193907c8e977bac0047d3fccf31398680f3c3f1e6927352a39. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPQ2148342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf2d93c81b3ae20f11914612c9eab594df1aa663dfc6eaa1ad9e8f26331e186. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:43Z), 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/TCJPQ2148344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f894f496f9cb3330093b91aad33d4a416215b21899b26704ee9a939751e815. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPR2264519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69834e54d05aa7efe271c9a6eb66552865329d5d7cbbe32d8ddc22724f72552e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPR2280523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c79f830ec3223b8f6f7fcccd710c180c94066f48ebc1fad183b400602edb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPT2290954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f39acce07db8a80f5c52aaf07ff51952f927a18c1de8063c728473aab2abce. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCJPT2290957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8adc105f858cf8d6ca8d8efa4f770c7f873e8b97b78fb98158c9f614571e03f. 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/TCJPC2444892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273eb956ea294339fef16441b2b132e7fa7155a953a3116aaabe83956442113f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPC2444817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58bc1d8d36eed7b072a13c73d5bc50bc0d04432637017e66f2d31c5aa308f1d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPC2444818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d82f761fd5163d197be45824ad71b8979988813f5d245aac265151b113fd42. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPC2444830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d35fc11aa893b0de190185afa9d176d2723cdb9573fdeee5f07c44a36242e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPC2444894.