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 0x1abfdfd83f51bf7adf2c576e36b593141de8859363b797968c35369f62be4d96. 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/0058d63a-3143-4bac-a54d-5a6e7653415c.json and https://artists.proofprofile.net/proofs/artist/0058d63a-3143-4bac-a54d-5a6e7653415c.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 0x2271065439bca50fc08054a30cb4165fe1139c230a8165a669e7371fac95de82. 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/MXUM62200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2271065439bca50fc08054a30cb4165fe1139c230a8165a669e7371fac95de82. 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/MXUM62200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e9110a70cc6b50ad2e5eea175dd482e381fdabcf78f554240bc1915e60e21. 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/MXUM62200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887aa869b90fc0d886623e430d58906f352d80200daef55e3b8fc5aa017005b. 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/MXUM62300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60efcc1c4a9fe4f82a1d69878d4ad5df344df6446f5b0be2f157a6b46041a74d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MXUM62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5fa7b12c2ea778357266a54f0c7aea28524f6e922ca91183c41d7795fa577c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXUM62200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e9110a70cc6b50ad2e5eea175dd482e381fdabcf78f554240bc1915e60e21. 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/MXUM62200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4385d5fe3a0359c591fd0a2d11701e81fcbac648bb84116b47761a967a3846. 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/MXUM62300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887aa869b90fc0d886623e430d58906f352d80200daef55e3b8fc5aa017005b. 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/MXUM62300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1329845879a525e041a4dd47c214354e92329e448206cb97dac614980502e5af. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:54Z), 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/MXUM62400132.