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 0xca3d46f5f94c4d512a99f820a401c17df3e311fcbefaf391a0925c81cc1724bd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42231d5e-3793-423b-92ad-7c98c58e72e4.json and https://artists.proofprofile.net/proofs/artist/42231d5e-3793-423b-92ad-7c98c58e72e4.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 0x71871d0e21d78f926ba95e82a82eeb147658e03b8602e17e0d90d379d46c74ea. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKPL1521430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f393fcf83f77aae5fb5b7c9199c5a115542b9c2ff164d432092ca020a630ac1. 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/PT3HN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e20c625f412d7e8fdd9b7074f2fd249acd04c9d670d892bde786295c069091. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES71G1922407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a76fb7e369ee6f1230f5359869a1ac71c2626fe78b6b33224495f727172940. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PT3HN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f91ed73b2c9adfee9c71435f87da3c9b865d95127ffedab91a96a458a57b973. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:52Z), 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/PT3HN2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe5e86e064eb748062e78b2e63d261e10d0a48e19f625231312fab85c9c99a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:17Z), 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/PT3HN2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac9bd6e8ed43fc2576d7210488e11778532fdb48b6a6dcdca94d0afc062031. 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/PT3HN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98f362b16973f886e12c0e639eafc8aee786a522f03412326427ee409137e53. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PT3HN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866173c7b175655b31164d6523ec9e95de162d98571dc9ced995505dbd1a2d1a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT1Z22400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40220af9d9cba8a0718bd85e3a37659ecb5a9d38bf6bba9917ed880a14168a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:05Z), 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/PT6AH2300074.
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