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 0x62330fcea14fa9084f3df5a1dee3c5f8ca85f2a143260ebf1f8d2266e6326609. 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/399a8038-d1d9-4680-826f-2c648c9689b4.json and https://artists.proofprofile.net/proofs/artist/399a8038-d1d9-4680-826f-2c648c9689b4.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 0x0607c56c7f333d24c288903e6c2ccfe514670ed107856cae715cf58540b7509d. 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/FR59R1942455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ce089db4bb151eb8740e66f94cb80a80188dc397d80990132d5208c7d549a. 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/FRX201601117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03775a09ad7d1298af2a9a71fc2e7a92bbcf7215a89fcbfd7240c8580f902abc. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FRX201601118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848100235bf69bfd0c344e015a7d42d3f1169ccf7b4548a09ee2e9ed287b9c4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX201601121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e05e6a551a90050475614f341def398714581862c2b3b9d7a91915900ccda. 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/FRX201601122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8490c1e52f622793fa16394edc3f5799b7601e787e1fe894ecae13994ffd8bd9. 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/FRX201601119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848100235bf69bfd0c344e015a7d42d3f1169ccf7b4548a09ee2e9ed287b9c4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX201601121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e32ac854b92d6bfa7259fcb22f1c3c82b052c294c0359768896ee2bc7289b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX201662322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c45b4367a9e10d895c6f1755916d5f5fc4197f95503153fd644d9c507870ac. 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/FRX281726282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a02908627604f66674cfc8093af8bfc211ccc2a4dec0eec7171641198a76f. 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/FRX281726288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f53d721f60fe64b29c658995f3f044874582c6f0f9e3ee5bdfdc542d94962. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRX281726289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f562f8c3cec8dce684dba665ac59ed6e91b77fad9742f227a26eb8ad2db65ba. 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/FRX281726290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91398f7a200c67af1594df8e6a46999fb4c135420e888e3be7abb49c58b7c5fd. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR59R1907852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe002764491acb42f17ea752ee5b2a42978617a5666f5500872b7625323e0126. 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/FR59R1907856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8b933816ad140d599e4c946263200bbd34a0f11177ddc9cd93c482142c3851. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA072192996.