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 0x95ca11f144f31c522b3a903ee7e3e02041cc85944364183005205e7e251795f0. 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/7c0b1858-5395-4af3-af3b-be4f3e571cb4.json and https://artists.proofprofile.net/proofs/artist/7c0b1858-5395-4af3-af3b-be4f3e571cb4.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 0x4832f5a66e534468c2a618ff79490d4c8372eab76daf7c112c160fa3b9c3b898. 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/QZHN52561116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d88f8374ccccc100b969ecf20865152f843a57bae7ad8d9d1266cec33666e6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN52561117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20edb672872f5caf21683f3e369a66368a92e506e23b65494d34e830771c8607. 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/QZHN52561118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1508452fe67b9816f130c1efbcfe26c37bdaa13a0c897ae51636dde43c507161. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:10Z), 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/QZHN52561120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d5582d2e7e457c7a3ec05b60d14deda68e5ed0ebd207f844d8af15a765c62e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:36Z), 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/QZHN52561121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9174def73515a8d16602f23eee2c748970f34507cf35d1254a8543cf7c922. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:21:43Z), 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/QZHN52561122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e821b7dc96ee32c3361d7170bb2e06686e3be94ff1c575bcce61538aebf1f1b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:40Z), 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/QZHN52561123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94e402c69a76e7a244c9970b61ab1d026d8758e57076118da32fb175e936e9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:19Z), 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/QZHN52561124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e75b60e10b04b20a0e2503588cc578dea73912075779be22beb484fb05e5b94. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN52561125.