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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5c4663a02a408131f0a9de70e96b575a942fe86877358dd7484e3e28a36187. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2ddbb59-677a-4ad6-9a95-e3fc9085b463.json and https://artists.proofprofile.net/proofs/artist/b2ddbb59-677a-4ad6-9a95-e3fc9085b463.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e6f07b39bd2639296a877be1291dc69d73bc81bc4b3ddc2df057a4b955963. 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/DEQ022116396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9112a723ea5097c08f766178fbc80901115e5438608abcad706139218f29992e. 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/DEQ022116397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f354e2ed904f65536c23537b442c4256d7060df3ce90e3a05371c66118982b. 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/DEQ022116398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5248873a3df253e7c4bc5a924c7ef7ad3ad0638ccfda1323acbf439519965517. 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/DEQ022116399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927144242af4a4d656b1654f16046a000f76b28b1b954b726b4b04364d838fce. 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/DEQ022116400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57ad7b893437a164e38f430060a993c419f02b92e02f249c1c38b810259f3b. 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/DEQ022105227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0223da801be830520c92bd9368b41db678e37ebf79206abd9e8b1c709ee1c805. 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/DEQ022116401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48177e4f00b7c658af608d054938b0bdc8e952a8e38cfd7f6ae5d255910bca82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022116402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31eed328eeb70b22cc957d194308eb98e4c64b9dcba511b38a185aa4f513af6. 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/DEQ022113625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632e60434e23f33886d585fbe62b20e2649ce24cf7137d6af71d4e026272952. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022116403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1607fe304f5d781b90130a0bf605018536605e1ab1f9518e17291a9a13ad31d. 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/DEQ022116404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28187f7035206c97ed3e3ee3a2a3568d8e4ff120d7788d82ddd4114664aa349e. 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/DEQ022116405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff04721737342cb56b23cd2b1b1f2f62f426fa995bcfdab3ec18654e0c6985fd. 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/DEQ022116406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bd0048ed8560e3346dee184f022bf3f237626f8b7dae8c08d471ba5dbebd9c. 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/DEQ022111093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff0d60b9fbd6ff09cfaabcfad11530a7221ccbb39a464f03a733aa62fe0d6b2. 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/QM4TW2531536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bf967eba8ed8977746d97e8fb295cdc02ff0151a256ddfc219a97c32da3d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2443524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8f242805bce86bcef2bb45af579415d0edb319cb8ccb93ee882c7904ca0a27. 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/CH7812407760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9018d58e8038d817b3e35fe4357341706435ae14903bb7ea2112f6bf765183. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DECM12438801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5844dab0f15ccd9555c5c6d06b7cae08c8ac808a9efa887062b644b002928b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DECM12438301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f733838ddfad434535503c2db5927a380cc48369067cbf6ecedb394445273c. 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/DECM12329901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b211165294a6ea54ea2c36627a20222719de286df9c86193b80befd6901bb62. 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/DECM12337901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48842d0b4b2962714ea9d07e231e19de9f16997bf75e9f2fddce90a4c9c0fa09. 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/DECM12132201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ddc74970983d05dee5c965e90af7c35a09b3cef25571126c158cb15eecd08. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:03:33Z), 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/CH7812100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419459de602408da46b34f0fa3fd8068e77f7249f907a5d2a9df1e349b1fa375. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812100792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdc3f20d9265616a51b6fc18cbb3b921a53a3b9c7e94b14e3a9a03a291b88d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812198560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b3d8d84015297667be4f74c31871d7bd811c2f118ffe7d354d6e521e52860. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812190895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086485e1bdf9dc45c3d67cabf93eb12291776fca5b43b7c1a9f21831c502f5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812190898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf417d37dd34387570b6000470725394a4bc38f814697bcf3e4740493acb577e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812182130.