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 0xc70524c228a4ea8411d36384ebd299319002f70e577dba95eda90b3d415cc96f. 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/d2d4bf6c-d570-4aef-b921-82e62acc033d.json and https://artists.proofprofile.net/proofs/artist/d2d4bf6c-d570-4aef-b921-82e62acc033d.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 0x39bedc2a85fb93b28dde0ba1a95961b26e4d6dd0e9c1cccbaa8580fa2a70495a. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USHM80680479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a33e5c2e768f916cf9db74d273fca5dca45f888332ca29c420405922a7f619. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM80680492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc5033469321649cf721852105a189a4721083da5900f61c5858a060284f5e. 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/USHM80680496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71200a6408c7275b2c1a8fa8d6321c6898699633f12edc055e800187537034. 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/US78T0501632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd36e936fa5713c3cdfd8526ca36f2c0ba45ba5de40ff65411fe2b912d2cc2d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US78T0501639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c53046aa620befeb2c6578fc6e72b60322c6ce0efe6f1865b42019fe2965f39. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAGO2244135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20a75cd62f511edc37ea9635c3c3b710b28162fba23d27d1ff36a31ba608d0b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:09:00Z), 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/QMDA72566593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11606c14b44315ca412d7d8a6d8b3a31f53b9b887bb55e81436fc2e0d44b7402. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCAJZ2554013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d8469ecefebef98ac151f78092db669461f5d193777cd34ce70d2c94bbc3ae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:48:28Z), 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/QMFME2563948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb4c9dcbc8e8815e4c3aa8541ee212cb4614b4367f4e3eb356b719ba474fe66. 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/QZHZ52097771.