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 0xed8c005bc00cec1f7131a1fcb0a70124e68b9a602101cf0a4c1bc3eca1d865f4. 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/2ad74cc8-153c-4a29-9663-985e2e14c500.json and https://artists.proofprofile.net/proofs/artist/2ad74cc8-153c-4a29-9663-985e2e14c500.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Best Of : André-Marie Tala (Volume 2)
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 0x768d6682cc189a940b259666504301f0e67cb5d325f7ac7e3c97d4da17192652. 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/GBBPX0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058a3d539b3b5e23d140e170eee60da50f509d829124fef2abcd22b92bb2019. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TW1937942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd19495117274ffc6fd20821423ea66fb8b73dce9dcb0cc7ba9e9731e8e2da4a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM6MZ1891258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b558846396dd9db35770726f283fb4e4723e192f92b7ec07faea2aebf75bad8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6MZ1891261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe519ae2935ae674cd1ffd2bef91d7f6b3e3f9fda0c7dcbb8964556a1d4334. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:20Z), 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/QM6MZ1891264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf0955bb401fd84d0314d7d4e0f4d30edeb7b7539017750230338aa101f5660. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ1891267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edd092f6e81b1ee858f74c6c9013a1d55bbe932c7073dd7ac001013ac9ac12f. 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/FR4EO1700048.