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 0x25a7df08fd8a0bed21d351c8eeaf4f8f6eecedcd69a54ade6398f790478c2bf0. 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/d9e7a815-4784-48e0-bf73-1687bd0efba6.json and https://artists.proofprofile.net/proofs/artist/d9e7a815-4784-48e0-bf73-1687bd0efba6.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 0xb536d815bb8c37665d382d3982317a6a368daaa6af9746e1e13998813696195f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA71850451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4874627d16d827ead0d7bebe37ad4200a46bd2e9ef5ea82880eefe399ba26f9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USZUP1011260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba78eb095022433c960ce1a317de205957cae2ec580d304d8f3d29d69571e828. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USZUP1011261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8511e18c3e0f37c81177aff20e987c095888c79291d57028b8c96c1df25d64e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USZUP1011265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53fe8615b64fdd9a16a746bfff9b12f2939ec2f9dfedaef515818f2ec382608. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USZUP1010056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b075aa21282bb5683e516f31642222166e73b0d3a024552e13a08e37659f0. 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/QZDA71801752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec8863eb60553ea15916f46eaa60a35e99c1615958ba5022ee58f379d093791. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/QZDA71801753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a55530d688e8414003e3b87720fec42563edae057959a536a015290c8d1f73d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA71801757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925ab01b8e0547340c4b5cc192ad16d2de8b3fd71014f2dea15a0dc6bcf848d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA71801759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e386ae3f1f9da9f11968da51e77c0d27467c4e0c2cf04663618e435011c8bf. 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/QZDA71830447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e63486b17a83d880db225d007155e0e3e72dc535a0e9f922f953b479753657. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:42:24Z), 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/QZDA71830448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f4cf7ac0c05ba06cdda21371e7bca09f12e932f91ebde2d95ef2150ed91a08. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:39:51Z), 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/QZDA71830450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2fbb0f306a332cbce27003aa75eb403de10b516be02ee67004b1c4961b3267. 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/QZDA71830451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e1ba4c64141b99db10adbcb52b0b580b0c320a3954fff4dcb80f7c1f44f8a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGC2235512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2915fc7a6e9ac71281708b01f3eb4a2c133c3c30020c5e01c9a7e778a5604c57. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/TCAGC2235527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859925ea949e19324156df215f402c4057be7023fadd42c8ff5874f6149850aa. 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/TCAGC2235536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187f3a377b1c81190a34c94cf09f4ffa768c042fed494b1650fcaa2fd377df1. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:44:54Z), 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/QZTB42385997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee092f1158b295aa0343845e9891dcf116be563c4045663d28f42c82f2cf494. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHN62567335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e93e4b22ca8d14c599f1f500fb429bcfbeea95ca19f07f1a0d16fd02dd4bcbb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRX452599134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d4ee6447e460def7733a4b090db3013885a64a3b80a667d5604b3557bfe4a. 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/QZNWS2409975.