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 0x47d048b3c3b2dcc8a992e9e03c66589b3626514207f77d241f330d4613bb6a4b. 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/c908ac48-2fcc-42cc-a5a7-5bbd25951212.json and https://artists.proofprofile.net/proofs/artist/c908ac48-2fcc-42cc-a5a7-5bbd25951212.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 0xbbfa5600e85bd44e4a63ff960a36e1c7d83b45b3cd7ca4a1de6ce683a7c438f3. 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/AUMEV2418697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed22f98ca7465da0bdbc2d01c0394a21d41bc8a36e610bfe913dde7b71693f. 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/AUMEV2393183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a116364bd8d1a9fa519deb5d31802bd7afd14b64bad89b85eefbb27b6effb4. 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/AUMEV2353310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84c776b428d2c19b72e689dbc957c5da3b4575b3d26d2662ac4ee42f2f7f0e. 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/AUMEV2335408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e781bdd1de94f905fc567e83b2453329c85ef8f95011ea3edf5574ddb708a14. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/AUMEV2319061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f8112f290515ca49d097652d57ddf1fac76a2fdfd107c165486d9af5dc36e1. 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/AUMEV2300734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe916a17d55df5290695292e37c31f353f14f78c82f79b05616bafc297d3d0942. 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/AUMEV2287065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4240e8743c64abf7064d0ada891d643bb976b087df1f51b75c3c656a6904e. 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/AUMEV2269523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b378dfb4e6aacf3fd533da0c022887e92d1d4891a3044694699986e54cfeae9. 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/QZFZ72276198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfbedc761002d438c87d9d09bc2b5cddf6518f2d4ce17f86d8e0d557c42a64a. 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/QZFYZ2201055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86ed9b347d11cdcf762b77915d6fd19119b42ea693919873d94238c818151ed. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZTAU2120895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1da97f8381bc12964f5cc6a8a5a9ff8b86ed1ab65ba507308735483a95102c. 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/QZNWY2129995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9884ceb1ccb59f07888b024a75c5aebc6075a012d60024a75b440d17f472d950. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWT2131192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2ce79192160e396ad8bdbb913d8be16cf1cfc5ecb96be8cba2bdf77c8eee0f. 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/QZHN32124551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bbf2cded5e6e11620b439605dabcbd0c07e5e4bfd35ddc6f51e7f247f1a586. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZNWW2032296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5fdef8320f173634530db852cc605e81bc804974a728306fed83a6eace0f62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNB2004930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285df48234449cdb6737df2507d71b9f6c3174039e5967e87ccb69e279644a1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN42048046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e4493f4a8da25d348d564d83e064fd27411ddeeb1452f6369e45dc34aee615. 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/QZES62098632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561634e6637ee6a4d05fc35978d4d28e64eb1bbe5dbac6bd4b027b80532a01a5. 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/QZFZ62023859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd615b9612b0e0305714fa0c16ed57aefcb6c4375fa21483ba0c61e6187a354. 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/QZFZ22050861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5e0be8480261bc7a2ae73c3c5164044461520c570aa00a863cfc7c37778f4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ22050862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff14cd6fb979a9e1a51322e66fe13a8e3a7ad934f4b7f9ef4ea77ac2a1e0ae. 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/QZFYY2080830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215296e846861bb0351ebd0992e5b04f42472e46722a3bb1edfb526f63499bda. 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/QZK6N1996099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99300739db41557e0f044173c1a2a14d2cddb95ef7dede2830953b7c5aa2653. 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/QZK6Q1998097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd42a973c2d6f41a2b3a6ea7e35519338c486bc1ca2dabd3e67d6e0a3ef358. 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/QZHNB1958424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f3486b44c9f66e466295195aa4bc7794092be40979ded513184d830f8e3b9. 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/USHM91978693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59233b14d1d2bcac252f5995fcca4fa6ce182803c1d18b3426aa6c29208b2b24. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM21918101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2487799904598831faa4bf36c87cd6c1301006e3b02a7c8d9fa8e08ee23bfa6a. 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/USDY41943012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f0b3e84540f9f2adda4434c4d8f14df77d22e54e7408a8dadcc9b3103fdfb7. 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/USCGJ1941806.