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 0xee58142ebff96129c4f3f87acb255236e6d21cd3606732d3c3a451964e689f5c. 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/9040cc50-5953-4584-85c6-aba87f9cec06.json and https://artists.proofprofile.net/proofs/artist/9040cc50-5953-4584-85c6-aba87f9cec06.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 0x38bf11086b88029bf37658647469c4158300fd8de689776da54e767272e2c390. 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/QMFMG2353317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8571ad17e7d6fdbe8e6725cdd00ab7f0764ed3f856d3726a4b223a9fe2ac95e1. 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/QZWFG2332327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf70250c22876ae4ea77e48ace34ce147ce16a17e05bc084e92dc7967a584fad. 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/QM4TW2430250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9516914e2db893a9f63b2781acd516ed6999e409c67e99ee4d06785da16fe. 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/TCAGQ2234839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa610fc2053f3e69c0debd9cfd85605938733ad651c61575ff38c348ab23cb. 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/USA2P2470247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cff3cc6c3b34cfc99b137da8edd1d109e5711355914605aa3f3719b40dbe4e. 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/USA2P2504069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8719711b9b249a2498fc89650896564a324f57df3482579ad6d4dcfbc95929. 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/USA2P2473874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2ff11a6e9ee46b38e1907a66a370736312dc2057d3ee7ac69194a090fb0e3e. 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/QZZ7L2447021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06411964e2b9b17b0176743ade6dee3e435753a87fb279779ea92ad87b076d17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1581340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5309be16b4d502bd96dddde4ed51d9debebe97d1926c6c8906f8c9155aba89ce. 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/USA2P2462800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac75d1a18f81240fb7357c2cbcf86b67adfcf25a0d3048eff4c7dd0ba2158057. 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/USCM52400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71dc645c7e24baacd3dce50aae52fa29f40660448e4199a5fa75be7c45b66c5. 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/USCM52400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77132c05243aa891695f68f4a79d3e9241027a69eb33522b7a6fd64d5283777c. 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/USCM52400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040729dc68b1b694e7dbc898b328f7a287b499bbb98b9ff8c09596104ca7bad4. 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/QM6N22429990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e639f47140e861cf555bde2e0e5ba6870009e3940d51f75b0825929e6e7fa02. 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/QZGLM2492023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114fd28e7725b965850985bfc03e79d321dd7552a075e870986152b50db1a68e. 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/QM4TW2422495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee75ac9c0d1753cdc671dd6eca1e64f34f8bda574229cc66774a819a3315e51. 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/QZQAY2426338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3082ab739f7fbc59e1332dffc942ead1de87c4dc7d50c4ad978c204528d9197. 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/QZZEB2302187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79350a722ea02a9e336c6ef4982caa30b9048155d63a561a2f88410124e71c3. 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/QZWV32396313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b5d38df14f0ca248b3f0d302155583df9029ae13c79e681841fd9cd0833dbc. 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/AUGBT2317949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049548b46345f29f1b6ca2437775024b89e4d037a77243ef99e878e6e3fbf757. 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/QZTV32354298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643199df57d228cb399cfbe974e48a7b2bef6be5d9db59b4411320cafdc972dd. 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/QZNJW2387185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a611c79681c322a8f7a219be8e180eab94e18cb43e94f0324e0bd583a5e03. 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/GBRKQ2366390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d991ba3051e342062c0d255e3fb258db99da1f2b58d90cc16ff4a6ec508bad9. 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/TCAGP2207835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769d5b3b47a22ae41bab2a16078e234aa7c809cf1e32c6274803a90771ebeb8. 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/QZWDE2203913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7dbf3047252ccebe651f0cdf69bdf916dc458d0100a5ca61d45fdec2f64aec. 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/TCAGO2283854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173f8a389936edc282089b2d406bdc7c44f11058cb75845c000ea326a3196149. 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/QZTV32200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c78f8bdc120378ec132092bc2ba1ff835a6fbfc3a8ec8db9ebe62e4fe7f24. 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/QZMWW2215154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e216cc29166d4c3f08ae90a7b65e8337da39dc07dfea93c4e726a879a02d163. 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/QZNMY2183795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef50e1358922b14cb95e8096eefe3295a4edadaccec5008bae92f02fce8aa76. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:23Z), 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/QZNMT2163838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e936f7b052e0dda268aa4901fac8fd9a1faac3ba12f09257dd0e6f398315e96. 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/QZNMU2062868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b40195af0222cf128655732f6e707a1bdc4726f35bce6dce20820a092e8a1. 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/QM4TW2447148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b568f2f6117eb5ba549dec28531e91429f4148c956331396a089013b5004f1. 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/QZZ972474048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39caec9b839c60883d5152a4115de73e1fa8736f3c735d1daf980320539b3b6. 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/QZTAX2350549.