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 0xb1f675e11bc187532a397c7a60a7781a50876427b66cc78086757ae089106e59. 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/6c777e13-275e-426a-a39c-b18d09088a85.json and https://artists.proofprofile.net/proofs/artist/6c777e13-275e-426a-a39c-b18d09088a85.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 0xea56cf157f33938392f435988ba2840a9ea6732c5c8a16473c63bacaec463c90. 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/QZH5E2400671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b432882a2555b481d5b68fce692b1c61258ca876a1809b584ceb057db3ca5bd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFP52427480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4fd32a3f8f378a186717fc4c105d77f61cbf40a3ba7c4b276756fa64eac8f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWFL2398498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1c62d51495de79e00ec543c59dc045d33eeea771a48d39994e89caa0d1411. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWFL2398499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8222817cbbda40e32ddeccebd5585ca3d56a8015e431fa525bc30f3c758f7e6. 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/QZWFL2398501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f17c7a784cffe8859e76098417c73a8d5db045e610ba9b3884cd1b3dcec00bb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZWFL2398502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6d55f7ed4631a642baaef13d3ee57908ab979d4c2fecda7666ec3c54e6633. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFL2398503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e612ad7bc99399c60506a4f3f43b406058b69cd912fd891481e1ae24175d49. 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/QZWFL2398504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98990c278a7f258b72ff42646423cd8dc0333090196ba5831c485def1bb22b7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFL2398505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90823056966bae1e3de0030475a6a8676ce871e0c9302454cbb31a8cc1e22c8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZWFL2398507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bffcd21a726fe78d426e91f3d2215391a2f0f07dd57aa4d2778c865b25997d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWFL2398509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3df548fa91029dbcc0a906e6f0c2b142be75efb34f95f7c43aaa5707bd8781. 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/QZWFL2398510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7846f660a1af97f84ab8d8bd9ecde987882427d38626856b9c902124cff0a25. 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/QZWFL2398511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e0cc4912d8194f494c473bb541ece94c055e43ffc3582d593a49e10de0156. 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/QZQAY2278202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cf62d9b37da2f1b9ef7e7467ae854b3bce1328fbb2bce4b40835c1755eabd5. 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/QZQAY2200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d97b9b541319a8fd1c66468aa57fa6336a48f6eb68f8b5a96bc23d1230e58a5. 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/QM42K2035140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3818e38495fc11915b3143b309fcca5eb602e2d22c01fc831d1442f657cbded5. 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/QM42K2095703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966414835dcc462814723656aa844e49ecf81318c9a900985a00b3a1c6ac0af. 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/USLD91776237.