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 0x9d73d343b07e3942335fb02e3ec43cd1cf55fa592dc489f37926f713e1b5daa0. 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/ef7dd0df-925a-4662-8f1c-9afe29d83eca.json and https://artists.proofprofile.net/proofs/artist/ef7dd0df-925a-4662-8f1c-9afe29d83eca.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 0x7b9996cb6de7ed2151273a8fa6ba50717aad54680c0f325c52f144b27a0a9de7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOCMC2402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f5f4bdbb741eadb73b83a38de5a36a69cc9343f3ac12405a89ca4ee338c414. 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/NOCMC2402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6293d6bf5c86ed8535cc2cf321345fec3d4233ce318097c6780299bcd5916. 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/NOCMC2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107bac4a14c81564622689b10137607e303a2387a2abf718cb7b24b440bc52a. 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/NOCMC2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6293d6bf5c86ed8535cc2cf321345fec3d4233ce318097c6780299bcd5916. 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/NOCMC2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107bac4a14c81564622689b10137607e303a2387a2abf718cb7b24b440bc52a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOCMC2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c16d4c560fc58f28cd3ec384750c98f2cf6934437ff2e154198fc67a700ffa. 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/NOCMC2406010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296ec189594374eb66e30cc435e2b2065809cb5f9cb6581c2b2897d6fb6b41a. 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/NOCMC2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4b146ba6568c13e363230088f7bafd62ecc7a1adbf97c836e94f398dbb523. 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/NOCMC2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045c673622a75d1e8b11414dd6774c36e291b3835abf92c2d2bb243a04e837e. 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/NOPAZ0404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47b231d8e79df909fa638133ba5f680629169b3e2344f888f48f74abafdc84. 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/NOPAZ0404120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4b146ba6568c13e363230088f7bafd62ecc7a1adbf97c836e94f398dbb523. 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/NOCMC2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296ec189594374eb66e30cc435e2b2065809cb5f9cb6581c2b2897d6fb6b41a. 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/NOCMC2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df677aabeff31e235d95a6e00f113f6de7162fdd8fc0e8286497e793547da8. 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/NOCMC2502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b51a862172cf8b1f80bf525c82fa500acd06155964a46966e16fc611c2046. 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/NOCMC2502050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f688d6957393dc86a3708e32b9b77bd220434192030a8bee477eeddad61e5e2. 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/NOCMC2502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c16d4c560fc58f28cd3ec384750c98f2cf6934437ff2e154198fc67a700ffa. 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/NOCMC2406010.