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 0x4d46897a26d5519f87cb913c2a47b3e74d30e54ee349f8389b344da4d12f4c8b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07e6238-a872-41c8-b3af-d78b1de73db6.json and https://artists.proofprofile.net/proofs/artist/b07e6238-a872-41c8-b3af-d78b1de73db6.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 0x60eec22f74afa8bc87c935b07bc0ae40cf07c013de41d7833b9ddb0dc65bb6e8. 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/GBSMU6381478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5269b7babd1d3182d4571a2844fcbb916a5cca0015ae3b735cc2e600b4b8fe3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL4NL2179309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b6bbacf9e12cb0e4a53026035031f3c1943013977f44c0fd5ff5efd077e244. 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/GX89G2459615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2f991d2585b5a9757240026a872e624341beec480f0dcf7af5ac1f0d68516. 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/GBKQU2402956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bd16c1fd0427d658ffcf67f03567a7ec29e3676c9fdee4276e9b1947045f3b. 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/QZQAY2399674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f57ee955fe81e89cb48cab3f13d30e9d451fa64b829ac09970968c4756f7f. 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/QZTLA2376178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabf5f2bdbe6912cbdcf1d9fac518020754f89fb3eb15b436cd0d30152ec5e76. 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/QZS7J2353555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8be2abf7b73549656cc0fcabb52b75961f0c228a3de96e631b6cdff609563aa. 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/QZQAY2469598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acb45a7a85d2025607534d808ad017a5b35b5da3f88a4c23e039d85f7fef4f. 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/QZQAY2447101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b570bcd0a4811563cec1f30e75ffdfcd8611ee7f36e624005b7c8ccd1d2a79. 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/QZSYP2444098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3719149c6795a48c7c0ae2d3d5b3dab965f4332e62b7c25a1c26c15b513ac405. 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/QZTLA2434666.