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 0x51c05bdde6ccf56f0239680077a4c6c910d392807a3b97295fe9f0bc44f39201. 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/fffe3fdc-deb7-4d97-9c41-e37dd29f50c9.json and https://artists.proofprofile.net/proofs/artist/fffe3fdc-deb7-4d97-9c41-e37dd29f50c9.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 0xc7cd2e31c051468686f53827182c49bdccc4111843d7dc8bcb18a0c17757aeb4. 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/QZTBE2480334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b955720c5dfd12cf7c604e0d3776b0f3cce6ea94db0a02ed30392fb7cc107. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWV2479616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb13ad8d0efb46a064bfe355503a020651abb2eae9c11d78054fa275b0473e20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2473219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1eccd18990f4333fce1cfd70f5f1f79a099527a7851109b858b10ed1ead59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2415019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867f7a98a4cb607dac0c94d41374f046d0daa4890fa8893bf50e55bc5cfc707. 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/QZES52452753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13ee77adbb485183808585c5b27ef1dd0ff300855feb15c580ced08d720db7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFM2322667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f910fcf51bac9458ce63397634093dd8e5abbf279ea8c876c5a8ee58cac5c04. 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/QZNWX2301959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75be82a76fa0351ffa9b3fea75cd32aeb61019c52e811f8ece3a31a09d3723f9. 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/QZK6L2383131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86688022e43a169337f0ad3f0749ed54208b1c1d12cdd399e6d9a1973db8dac3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FIP6V2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aade20b14ca7e7f3662191cc5827ae8c1db249f5ae5bcbc2ec986c5abe839a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2234768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b6b9b5e02b9aff42b107c98c6af1595def461d5bcbe6948f7669243a37757. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ782474307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6206a80723b4894b72d0e671e44a434c4f10f1ecc4b26e3eb7d201ad7a12509. 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/QZZ782474308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b955720c5dfd12cf7c604e0d3776b0f3cce6ea94db0a02ed30392fb7cc107. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWV2479616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd2e31c051468686f53827182c49bdccc4111843d7dc8bcb18a0c17757aeb4. 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/QZTBE2480334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f910fcf51bac9458ce63397634093dd8e5abbf279ea8c876c5a8ee58cac5c04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWX2301959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65409133c60e9aa41fb7282bd4d3962c7ffdab2541af4ccda152e56330927f3f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ782474309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1eccd18990f4333fce1cfd70f5f1f79a099527a7851109b858b10ed1ead59. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNA2415019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5698f5cdb7b965ef76a487a6855c2453b7da0b00ecde1a1744dffc1e03493b5c. 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/QZZ782474310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2ad2fe876cd7d796a21700c994af82f6437e2e73ae2ab53dff64ef0bb8c15. 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/QZZ782474311.