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 0xa4bf66eafe2a2591cb036334aa586313cc9f259f8921057c98826dcbbc4707fd. 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/a1b3c263-81a3-4f7f-b43d-8675e0108f58.json and https://artists.proofprofile.net/proofs/artist/a1b3c263-81a3-4f7f-b43d-8675e0108f58.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 0x46d7c6192e19f1f55800c523f8aef2c3de85f29abc9a02e40c9df0aedff889c6. 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/SE6XW2395083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af2f11422d8c509e198169c0b103e9092f445ad056366e85305889e88a06e0b. 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/SE6SA2376344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698cf6674d2f070243a5e18cf8793055b61e2ea6b24b3a4079b3de63ba8d980f. 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/SE6QE2377492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff2dc4f3a2e116d462949dc45a538d6c29c80e202a9cbb4705e7a62f9091766. 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/SE6QE2395938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b5a40d72519e86a948497c2a0b19d644895d4bf93afa16bc3b00f554f67964. 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/QZFZ22395688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18737f7686c6fc37ae9434eaf8a75cb6c28d47322eeb003462a3d89cb0cf49. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB62271303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a5fc0dd80e541d636f17ca1e9fb4f2289b8725bc999f6b85d3c43195bcb39. 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/SE5BU2436260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe810e3d4b642842ec7889dd76b46abf40bbddc270a7552d6fe0404a2fbbcec22. 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/SE5BU2401881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1196f23fb726d95bed2b5d851a0eb7240633ef945ad5203f45d53cdcd914bb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/SE6I32481306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc5df3d6c5c0910607f92418a8f3247b27de87952e24fae12c83cc2556e808. 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/SE6XW2355744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb278cdbf84a73eb3a0a52e6428ed0ed8ff1035ae123d5230ae39f7499609a6e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6N2437484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65130aa6e0db936f4badf0f3165295a0229ed88ef587e4e7ac6ed8a19fb12d17. 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/QZES62368447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d879b124796aad4cfbd56197fe16a53474ec97c971dbb3232ba2a7aef12807. 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/QZNWR2242228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da7adefdaddb60ee0daf44438e4fbc961c3d7288f6ece1419a0377470db1de0. 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/QZK6G2274801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c9445d76ce861421d0c1fb73f0f00eb7cc370d08ba6fd802a826922a9f0fbf. 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/QZK6G2209240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbcf3a76825e39da8fd64b6332728e9326ad8da24339643acb00cae49158b9b. 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/QZHN92270972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddabdf2fd8b957a1644a7a96a5d2a879cdc0a07e67b6f796af41831fc7bacd26. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN62288357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31f346170e5e6ccbb7ce5fcd1c68e5d9405fe9643a073b48ecfb87b8de1df61. 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/QZHN32252381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfc5c2fdb55092108acac62250f95bc7b9c8daa6f490c7fdd0301773e4ef021. 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/QZHN32277861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8f9ebcfbd39a810535acd6d7b7c637e603a3d9c94411658c014f310c57c374. 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/QZDA52244178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38cd5d80932b27fa14bc670b68a764b1085f178affa6db0c3db9c1148705eab. 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/SE5BU2282072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf8f21146c0c2d03934c5c7eb4d1c907e2f2f0bb306aa6764211e825e7b8048. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ32223413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a0a7e571a1bcd3f97cbd29dfc841ec28cc1b4f370c89ef859df99ccb7b2257. 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/QZNWY2190720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dfaddfb1276ed6dffdfa316b79acc9eb2db279be461caa9ea15cd6a9b691d0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWV2162149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935af1c16803d004c19b4af4fdc4abbe2253b590a280a68326949c19c19e36c9. 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/USA2P2459895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c58ea91b32712477f5eee66021392706567612cdd305c1b279708e02b54c7. 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/SE5BU2559428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ae0490f7ef64bc8433e8661decdbee8748718073f881285513c024bcca124f. 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/SE5BU2522783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd5994f50378ba669aaecb24cf90d3940752e300b9397e646f2223a9bc3e0b8. 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/SE5BU2514129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc9c27253a27e96a2698f824bb2bd0c1bdef33c239d52a7ccfd6e1cc2411132. 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/SE5BU2505175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e0daea4d324d5e25f0f7c301df993d0dc39549e7341c4cb3333a52ff06018c. 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/SE6SA2436862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058db0138265bc0a9cc86e0d28ac9fdfc44e02bb87c673d67edcfe778f0f1942. 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/SE6QE2444395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb8b631fe2cdbe3086c3fc97cfbbed7e6f9361f4c8e939757079ba460ede67e. 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/SE6QE2446498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3076f9e4219d7c297a254d3d2e1117b63c8b66061be59726826bb119c3be4. 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/USA2P2444862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac72da5b4322076604bb663559132e43557ef26afb6856ed9d2a46b681482a8. 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/QZK6G2192070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061e37d0356a6b49557d2228de4f3673127139e17ffff65871638c88382428a5. 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/QZDA62192418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb299a5a2e9af33793f078dd8f5d7d8fde6da4e79c00a34ce4b37e99c5fecf80f. 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/QZNWZ2040338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec37a335dcedfee2eb1ea09d2d821ce1d7468616e78b441e5127d029740f448. 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/QZNWX2070273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2cfc34fc0468d75d1b5c16db3ceac90b48eb4e9b58a26a73e4334fb5a2f0a5. 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/TCAET2020355.