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 0x33308a16c1379c7b8b8b5222ce3955856c140359d3cc454ce96d37bb12a786b5. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e47a9d5-3e39-4978-a84b-e24c1c5ffa24.json and https://artists.proofprofile.net/proofs/artist/6e47a9d5-3e39-4978-a84b-e24c1c5ffa24.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 0x2c0d21b6b92a75e6af5ee40070daedb3a1aa4730959b883275a0533faa7de687. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CA5KR1837499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fa34599753115a5489d5bd09596290283c13292f8cb818bd7650d5b168c7f2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM91941659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576cd708d22e24e8346d52174761153ca204684663b92a1efb306911c58e0d2e. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/USHM91941661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0fa47a716d9098c8722cd0268fd8a709219099fa3e279845c9d56d02b72e07. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM91941662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b44f7899628ee192ae15dd5d2d2405c040ca3363f330d4a7c30011b53a0de8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM91941665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63957cd64166d2b9fbece5ce788179ed47589c1a9d8289d029b1c5282d7b2e5a. 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/USHM91941666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd74d02dae4daef88089bc962599ea415ae389a2c7ed1b96fe59ed71a20ecb. 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/USL4Q2027795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcac4cd43aadafbdc68d54349bb10105e14b93abc3288dfa009e88475692de7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TRBYM2000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf88436c8b422a5993970c961b5463226257be7b8d138604c9b024d26c468dcc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TRBYM2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6701c86d8546ad2278568be82afe88c14fca5b725afb8fca0c91a64ed708ce4e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TRBYM2000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a4dbc6bbde44b67140ee73badbe1c6c8eb8fca1e410e2f49853ec1d5579d6. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:36Z), 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/TRBYM2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcac4cd43aadafbdc68d54349bb10105e14b93abc3288dfa009e88475692de7. 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/TRBYM2000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68460bd0de59166f67151d8e7ecfbdf43a2379b56c9545c21336202773af5268. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TRBYM2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95811a64a7746ce1c9bb769c82646d13e378970203802ba09c4a93f9a950571e. 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/TR4952400033.