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 0xa18630b632c6ea52817eb5aec092a37854be21d2f69c419b6fbec133078cae8a. 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/45e23d90-853e-4d5b-8d5c-1780cbffda71.json and https://artists.proofprofile.net/proofs/artist/45e23d90-853e-4d5b-8d5c-1780cbffda71.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 0x72cf22262bda7be72b228d4c118e7bd6403212e853ba86e0348a5f4a026a72e0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZ901401112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe03a5f1971950062520d3dc5cd991a29bc112c6d87f1d53914e879dbd5f99. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DETV91500387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc48873e6518cefc18952b893119835731a409d606643c911c37b1b5b23aee. 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/DECE71800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442f62f1997a6b07c5b2d713f70635d95a24ac8b47b45be3796532d1ba7a826. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:44Z), 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/DEXS51900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11150fd12df5364072b72fc27fc901a8b4f877f9eec8f506d7517db4029294b. 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/DEXS51900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc48873e6518cefc18952b893119835731a409d606643c911c37b1b5b23aee. 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/DECE71800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8bc8b9617bcff428fb0cca3fd4c2b470cbed148e322f7ab40c461addc2baba. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DECE71800273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb3c91ef0f670dbb03b648506a13c0f4894ce084f483cd40d2c42aaf01a3ae. 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/DEXS51900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977f5566f160c0cce8fa10ea63cb0311a73be5c60ef63ee47f703527d30eb3a7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:31Z), 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/DEXS51900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0808e3bf62f80950061a782112c5e1d89a53fde1a13c2e288827bbc65409dc9e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEXS51900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4b3865e3c88d2df8222c29d7a8c398340258c85337001d8ce71bbcb404ea7. 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/DEXS51900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd005d753f8c7f799b4ef4e01c2dfcfe6a2f889037a48212301ca61d3aa058754. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/DEXS52000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c03e09b23d2f38afa03bcb2b3ee834175dd8d93bb3f00c037a103f1f6e168. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEXS52000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d1a4b7b650e669c3123136a0e001c723ac76b0ddd87a2fc0a8b4c29d0cf86. 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/DEXS52000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20368e3787411f909fb57294bf911c28c6cc97b2cd2d0d1a836cf144fe4759c2. 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/DEXS52000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d49bee0446b30e1ce8337dfa3899a758f1c347a530e1e80bbd4cd5a341b5bf. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DEXS52000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7345896c3693f2e253bc31c2879556f9e1dd30d2eb667a52263abcc0bab5f761. 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/DEXS52000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09de7783caf1b66f84210ff3c9889e47dd8bf6d69a9de41467a9ebad28dcc0f0. 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/DEXS52000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6055488ae1fe2d2d683b167674680a2e907c589e6fbf7229639f0594530d7a72. 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/DEXS52100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7f87c6b0be859bb46d39baef823eeeb5d2db94754deab4f7b66d8588e9f18b. 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/DEXS52100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba7b9f47682d4c82f8569075a3ccc9a34666051ce1bc78404438e2fb7a232e. 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/FR10S1606016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf478bbbe6f99460cc48915bbb532e0bb9cbc8e3888d1303affa24af5d1d01428. 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/DEZC62495888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cefdae5c7b50a08e295f3a52b934019978d992bcf0d2428141e5e6fda0c8aa1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZC62495889.
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