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 0xbfb106b663c881eb8db05e90ab7bf330ad9c56c6b9eb6f1eebe538f9dd5c0b36. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dc3bb9b-d7b2-4007-969f-55dc07d03b44.json and https://artists.proofprofile.net/proofs/artist/4dc3bb9b-d7b2-4007-969f-55dc07d03b44.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 0x2da30790b4e832817d11d664a074a0ad9a02e8a769be4a356d7c0d9569c0d255. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX89G2346514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7ad1eb87b6383bbe90ea7ffb7c508adbf806efd8efb9e851f242b32101ef3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJO2526278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd3cbf520771965e872fa50fb5fd053fade90d27330afada2d10e4b42bd4adc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:33:45Z), 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/TCAJP2526288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcdc6651cee78bb7f7c47e6607909eb9174ab66435a8fe7ab4096e93cfb05e4. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJO2526291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12430301af164505c617d804f98816cdd53f9b3c4909069381d1d09e3f02f44. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJO2526295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dbe98e1d4f8ebb62abd2eb8f86020658834d09e3da120735df8be2af50d7aa. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/TCAJP2526302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e3f9cec7f25d698056dcea7ce2300ddc0713ef25a13a00ffe33b674e23793a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:37:42Z), 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/TCAJO2526306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517f3a0650c68e0e92c8232a594984e63ac8296397e83ef934e06251cdee42a6. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJO2526309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3b784113e58cc59cfe77bf93a7f9f3208d37610656faf47c78bfa111c8a61a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJO2526316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc0c92c5c4ab1851f1c0191a8cd8b18fe31da27c5c8dbb99521f44ad3dbb37. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:34:33Z), 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/TCAJO2526325.