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 0xd57d2f9f27bad9c61608eed4d8588497c59ee2499fa9eba6794214bf53404edc. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad130d20-7042-46c7-a027-4114bfaf62e8.json and https://artists.proofprofile.net/proofs/artist/ad130d20-7042-46c7-a027-4114bfaf62e8.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 0x6d816a62a03799a7df9cbd1439fb9dcbe00b74641bf744f646e4f561e60e88cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWW2486194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8916741f0812d67599183222a8f23412abe7718485f7f27e0a092dbed880df7. 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/QZTB22453016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4090bfb4e4d755bb834059d57f2b3bd93c85315342ef5fe9bbda271180ed2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB22453017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260db3243f1097abe9d43d3d5a28d04b2b6a9391b9fd6d67af5e663e1a3631c2. 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/QZTB22453018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16771fa239f8fca14d0bf504825bd67de7cdbcf557a655dde31324f397dbb788. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB22453019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78ff105fac434f3a28414d3283d77f6f3df417fbc279b06566c0a00bc1506d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB22453020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf739d3daccdcfacb8937afae2dcf4f0d6c65433fe3690d02c1b2baecd87fbb2. 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/QZTB22453021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736d78c855e66db99989a76d6cb6a6f77cc87e92d42592d7c535b051bcc911fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22453022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3f60ca1b28865947ce08e2ec37576d519d6cfd0cb3ab0d107e0df37deb6db8. 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/QZTB22453023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb2e6e5ac9787f3576e76e56aeb431739cc1245135a6f71d97e4fbaea28300. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB22453024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d545c0c0b51a3d8d85d9e4fb2428f9c9180a1e676ab327f2bf082ea20adfe73. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB22453025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd8ce864badcc646bbf4e4563ab5be1cbfbab35bb2ab02ade5d2033cadbf23. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTB22453026.