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 0x03a083ef3013bd37b508354b6fcad499627fe9886fa77090b58ba147b37e3efc. 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/64731af4-de0f-49e9-86e7-ddaa39245444.json and https://artists.proofprofile.net/proofs/artist/64731af4-de0f-49e9-86e7-ddaa39245444.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 0x4793a3ec729aac8fff41901fbc739575f916821715d8f3704f48492a385c9ee1. 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/INV792411014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab33ea32696dd27bc25ca67174fbea04bf0dfd2814c30aeb5297dd172a4d7e9. 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/INV792306424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a7e8230872b7db3c4aec975f93b503633ceaef12bbf979a89269403992e0a. 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/INV792304052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c49bcc5f9ef295a6368e175bdb8803df9522484687d2004d9a56b812ce2888. 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/INV792410824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1839f9bcdc4677a9ca1b48ffe1ce5d10f38b35f68134fc10ea48d26eaa62f. 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/INV792404771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a1402a4f81a4ca7110f9f711e8ac313df14bc4d0cc6e9ededfcb10f9544b2c. 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/INV792404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4e7da2e1267618b3c4d597d97f77cc54d5527345cad6b1fcfd553e06417fe. 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/INV792401547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b446cf789df3e769bac9a454b9ec21780e746e2b96d8f96246b5bc0ecc9519. 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/INV792403703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be5609e553ba34406563c8ee89747990f7e424fe619af910ec54aeb9971add. 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/INV792400633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482a16195023a52ccb2487eb786c9e6463ff4173dd8b0dcdb3c974c3e222ee1. 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/INV792306602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326dbd23087a5d39f9a5ce696af740f45cbda5196442cd9436547d9063e3954. 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/INV792306239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f70459e4b979ccc715464db99084c21caf68500d70412ab5ec6551354a4edc. 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/INV792305849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17969ed5b5faace3d18ec1ca480aa336b3fc5218e670b5317b385d06c23f4f3. 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/INV792305437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b22dd167d474fea7d342f8d13e13a1770410b5f77309eca1f4ba02f4ae59bcd. 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/INV792305404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875e149740e3aa02501b1313a95bdcd91f549aa0322aba4466991aa6fe86da3. 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/INV792304812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96029840c2532f7fdf787e6bdc17b7dbf857246cdc006e86aeaa4da6bf2b4644. 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/INV792304750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9200f875a21bab5f7b0df30b17c55c521ef9bd33ef68104e50676d41077941. 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/INV792304291.