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 0x052a7ce7f8f9a76a81e2132514b836d2f9ae9cd76ec0d46b20ecee950e857e01. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aee0f197-96ad-4718-bfb2-4296e9d714c3.json and https://artists.proofprofile.net/proofs/artist/aee0f197-96ad-4718-bfb2-4296e9d714c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xadb88c81b0826eace73a374ddc0b1f0397c91475cb14f8824e22087b3b3cb93f. 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/FITCD2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b6765f769b5d7319a972e569ade37817d7146ef51fa43298671c45cf23e92. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:32:01Z), 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/FITCR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835202241237ef0f3aba38e3a64ed95e663a6b0e7fe77adae682aa0015e0adb6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:53:19Z), 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/FITCR2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1421dd3ada5d6ade89c3ea4023a5fd504714a1a2da0eb825065d1b9ee4c8ed. 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/FITCR2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a661de8d88ac7716bdde1e938eb14013ba515bd9e94b5e7b07ac6a75f94b9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FITCR2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693a8fe3edfa692477fead9b46cec07dcf45e16da9ce938a3d93fa10ede955d. 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/FITCR2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9aeb5899ed69160765aa9ba9b6bb21bf3787ceda811ee0a58b276bdd86fc3c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FITCR2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1421dd3ada5d6ade89c3ea4023a5fd504714a1a2da0eb825065d1b9ee4c8ed. 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/FITCR2400055.