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 0x1dcd56203c275091d39a80466f7774b08a9367e7d97936e9e53f2cb0ee9d601b. 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/624bb826-b388-4627-aa55-be1e8c968a74.json and https://artists.proofprofile.net/proofs/artist/624bb826-b388-4627-aa55-be1e8c968a74.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 0xbc576fad740c33bf3e413a6e41a8b1865d038b7e2df94ec27665c058296ceba6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AR0ME1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31789d6eb636565ababc3b33b2b9c25afe5530c927dca68307ee378c67289ac. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USCGH2087857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e0ce725f217871aaeb83b37359fb03490754e909dd6c8671d83cdfa6bc640. 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/ARJ142000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a5a958c652eba1327a1aaf53cfb1008e2bc98c43b843ea1584d40caea17b46. 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/ARJ142000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6369176249176d2317b8ec9eae4d34c376405c549135f66e09e22d4ed263e49f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:38Z), 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/ARJ142000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ad66457c4bc98098ea1195361c76ebad764875863be9bb301020615d190306. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARJ142000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22ce546b62d56d69f3799a0a0ebde9fffd7bee6bf7762b2156a4e97ad2d077. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:50Z), 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/ARJ142000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db41feb7b83ac4fcf5472a95874493c3f74b665b0d1dba214e727c2e3e7bdde. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:48Z), 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/ARJ142000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e8edc41adde508780e9dc1cb69c313d298be28062f2d456d9c800b9816f035. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARHJI2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238dbe8765e25bbeab6bfac0d7f63f42bf57b18f16343a32b7bf3f91a2bd69c6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ARHJI2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe52f092c87b31a8be657b492ea691d4272d5047206cd79b1920e01dde4b30cb. 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/ARHJI2500001.