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 0x3c94b6dc6739c49099229b70b9c03fbd8688d1ebfe8916df9fbb7f6f01d10506. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcbca986-c969-4556-863f-1ef4a3e1ce18.json and https://artists.proofprofile.net/proofs/artist/fcbca986-c969-4556-863f-1ef4a3e1ce18.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 0x0ee15c74adc786450f073168e001640517d5c51ff5f53e76e2dc7c2dd4a813fb. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:47:06Z), 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/FIMRR1400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5eb2655f3ae0d73afcfc02c08108b414235eae115614b615a676b442e5d54. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:09:19Z), 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/FIMRR1400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd435c2c97fee75fa02776dd54429b22c6e9de5752c7ce06298c4c1d4aaa8d11e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:58Z), 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/FIMRR1400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dce4ee5603bba255b02b7e22acae9e7480c2e1cb50dc51122a64f315b5cf12. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FIMRR1400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664e74d7fc3fcc5a81453c6ed2a8b1dde62bcbe80af6bbf0a43339972dd198dc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:27:50Z), 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/FIMRR1400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ad4570003c342e19087f219317201108ce0f5038bfbbe404361560717dd4d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FIMRR1400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261ac3f88a6b44c14b1e272dce27206695403f00f239055802630d1a9b42e96. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FIMRR1400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3838610aee129da06c95188b6be5e2c61f1476db612ac343a0f9971dd6b6578. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FIMRR1400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8648dd7998681d19f1caa4b85ca19e527cec36a5e4546d33f78fc57edddfd888. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIMRR1400242.