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 0x5afdb62308b0ac5faf97390cb0c3a7daab16e53d23f3cd6d0aac71c8889c9352. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18bee570-d369-4977-a2d6-a4e8d8c6d06a.json and https://artists.proofprofile.net/proofs/artist/18bee570-d369-4977-a2d6-a4e8d8c6d06a.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 0x3181880e6ddb8634e8e2e4e812791b491f7a3f7489759c0524cf0b9f8b7f5ad0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS632544235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620fc26992dcb0ba82f8ce507d6496ef9d25db3835614979566ff89a37526866. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZS642527944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd8619efcbabe1520aaca042159256acc1e03ab90d36610be344dc83785660. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZMHM2535276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b294b6e5a33419b9d23941b124c3f187ef43af855d256c4392729ab856bfb9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHM2541131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6e9d138b17e690f3bfeb9fc88347478507586a7cde0e3eb8409871adc3951d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHM2516965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4199a9c48fe252f0e527a9b463ab7f14e57ea1d6b1536a38011157d1cc61dcd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:55Z), 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/QZMHP2511421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac13e88937899ad7faea5aa2c0ea7d04a2e9b65930fd241b6e4d0fe9399d865f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:48Z), 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/QZS632586760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cebd2a983a5d33f5f075beba1e5b55b6d4027c82ddb20199dd9e50cb00e9e3f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZS632588137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f7523c42f2a843e7cb76d58c3ffeabc6d31cbb4635886ed860b699b7942ced. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QM42K2556434.