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 0x90e63e0d6d7e0508a275bd24fd356690d1ef6cb01064d805ea5a0ddb78c8bf8e. 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/e4e91ddf-eaae-42a3-870b-7484a0149dbc.json and https://artists.proofprofile.net/proofs/artist/e4e91ddf-eaae-42a3-870b-7484a0149dbc.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 0xc33c8343cf28d67e52226226f98ef33c018b5e520c084b2ddbbd130862e379fa. 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/QZTB92311577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be66e48e73ab7bfdb37ae805008426e4f267d643a58320c060b8e1be22e6f8f. 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/QZHZ52221608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21da6a29ba4d946869e1db305f1fac4b25e1699443d5d5d5c5c90d3ad557117. 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/FRX202123655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4572155bd08292787505ba902f60697b907ef5851f0af25b616a822ee5ca63a9. 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/QMBZ92281175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b4f41f98919acf1604b8a1893539c1ce1362e906bb700002040c16e385381a. 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/UYB282366033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315b59d16144a955a4b9489c6ff1543533abb2c8dcab9426928240fc01661aa. 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/FRX202270389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d45a90d98ee7e9cbd6ebcb1bb6fba6ee50365089bd00bad396ddecf6c97ed8. 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/ES75E2101855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b91cec541a8b3b5fd5e63d9bfc5a89088837a09448f819a2933450874b52dc. 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/ES75E2101856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf698000acdf8a52928fdc434ded4977f4de110c3e48223794c0349a5977c083. 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/ES75E2101858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2a58f4d8deeb510ebb1aed1466213fb5c410bc76eb5c96990083076e75920. 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/ES75E2101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5225798267e598eceec9399248d0a193e991c93d757413d515b966098e7046. 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/ES75E2101860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505db56b825149129517f50f9b919493b887b20b44b80f73895d0410934e960. 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/ES75E2101158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285ef3c1b4d29e9d968ca52b5192ecdd0dfbe58b02ae15434f2640ae3dc9df3. 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/ES75E2101863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac2392bb7d13350b2cda047fb631deac2eb7f574b89a66d2ad59140cc2436d9. 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/QZTVM2327495.