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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316923b389df740e06ec9afc7fb4f3885d4ee5e373910d6db0d2ef6180ba3af0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7864952c-13f9-4974-a93c-0d2d9b6ed870.json and https://artists.proofprofile.net/proofs/artist/7864952c-13f9-4974-a93c-0d2d9b6ed870.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620d6a0373958d1765a388840327944032208a730cc8c48ccde3385ee19ee1b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US23M1800077.
Jane and Emma: Music from and Inspired by the Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed26ba90b6d67143fbe96edff6162eb9d5679f2fb53d733db663aa933cd8467. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/US23M1900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef0f9cdbd0c44bbb3df85ad760238152d0e522ecba044a604f314fe9f328e6b. 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/US23M1900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3810a4ef9a037d36650be6aff3c79c342c8112a467342a4bfbe5d5ab8c1ee4. 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/US23M1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319b56e1b0a0de81fc5106a2694a75baf480aa933685d141a960cf39511a7bfa. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:06Z), 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/US23M1900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78745b183a43d1acff7d234a74933f42f05e4320f3a38b87e4612f7a6fdb501e. 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/US23M1900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7809b2a6292f714ca8ddd52f534ed919fe28341fca6f22715a046fd85866cc56. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US23M2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe705cd9d2a64d1a4a02a2721e9cec18a1c3a57f52d387575e7fb1d5e88b66e0c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US23M2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821b7470089cc8e291bbf10d6dd5482315d5e6876c39b8590a270497708357b7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/US23M2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10273e0760daa2f9805833a0ca126795a5096a49c68e2c788b0b3da11f62e3bc. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US23M2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dfb58fe20b9d66184f34a079e69b0320da39c1dd887ff319eff4d57df14718. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US23M2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f44e206152a18491d2e1c11cf96c913d4c47b771c71c1b20d37f9b3374bc2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US23M2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5237e9bf64946dbf3f6fa7d2782dd884d55b2a3e9fb66636b9b6337a2d089. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:11Z), 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/QZTBA2437739.