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 0xb48ff2c6f35ca2ac76624159b1d18cbc638be7c64f1dc49b2cec34ae94921a1a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26b4f571-9a35-4721-ab6f-b1687bc57941.json and https://artists.proofprofile.net/proofs/artist/26b4f571-9a35-4721-ab6f-b1687bc57941.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 0x3d933e7687c79df1265b31026948ae0e80e889c496ef27bc1d87e32b400d344a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL4NL2131693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71314852b5ab47a3d7c08122dba280043d5c13d997ed295b56c71ec2a99d7463. 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/NL4NL2136867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8bff3b9a4ff42310ba8c2a9eb31d1e19691fbe4638d0d33158016728bdeba6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:36:54Z), 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/QZNWU2237385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c03632125ea0a65088255698363ce7841779d71edc454a0b2f2f829e80b0381. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTB42354967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff51e81159a5e3afad7857df3ed8deba9a8bdc642a991c5b32e1bd6e16c56b01. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTBA2369904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ed6955237a9dd6a85db7d6bca2a32c3de9ab4b556a260c80bb8eb0c07d5577. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZES62476139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c150005e9707d4ddc7a610030c8e94cf88c8062b22a882935efbc3023d84d2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:55:26Z), 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/QZHN92449359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad55cebf2956310bbe32b921ee98b5129d2f7aeaac69e1c805908dfd87e93d5e. 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/QZTAT2398178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f925ba65e01cc5e6aca5f7936233d1bf4578f7c9f5bcf07c446a6006bc88cd. 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/QZTBD2451415.