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 0xc5c5860443b2c6835dfa19f3808f01e614cd6e5aa0b7e7c71f3a1e637d7cd409. 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/fe53323c-7109-4091-86e5-85b6d7ed9f30.json and https://artists.proofprofile.net/proofs/artist/fe53323c-7109-4091-86e5-85b6d7ed9f30.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 0x076d9d55aa3082b7678576710e4ffb2bdf983915a1304136b05c5cf9adfc3590. 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/SMRUS0050221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0f5d7f122237f5bd1885de1bf555870ca1c2ed66e64ab834fdd3b3a7a1f80. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0050229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3e259cf62cc75300a97165a7dd4c80bc86102cff8e8d4336a44bb7a8140f4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SMRUS0050231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f03e266ba8e41618d81873bf2c640f683c55ecfb5522671425ae8689ea2bf. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SMRUS0050198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182f26ee5ccf8890798ea06e0f94feac9a9ead1a46114d5196ecd0c731863d32. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/SMRUS0050199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d98b089de471e5c29b45bd256328b7819677746ac1ff1ef67a4e3e050866056. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/SMRUS0050202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02752cacdb282f2b57aeaef66c052a2900741235e32f11dd17f6b0b3e7a730a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SMRUS0050203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bae6ec5961048cf5d62a6dd10fc7147ad948ba79ad1026eb0bd89dfc10cfa. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/SMRUS0050204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf81e6d7c0d778408e316d66156006beff9508618b996bfd8232be1c019d8cc2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SMRUS0050205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b251fcd5d072d3386569c8b93d9de9bdd6d4bc011239e473bbdfe6f96dc8b4d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0050206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecb96e38bc86f8c3646276b9fdc1e32523e18201b3e66205c5759d7ed5b018b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SMRUS0050208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a01e8a1acefa514a1a399e0a592527fe56beaafd7fb5fbbda98b509cb951f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SMRUS0050212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db1827cfee87cba1b8f0c2f2c9d488b956a06da510837d46bb7b1c8e4b3e177. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SMRUS0050236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465bbbf75d45d2a1ac5469693cc2de61c9ba1e0b7aaff80b46ad26fb535fcb81. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SMRUS0050238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ff6744207e9060e60f43a328edceeb11646d7ba67550575fc9757c24f7d7a9. 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/SMRUS0050245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa2e5d2e1c867e99fe280742f0869372df45ed3fa36042a0fa2ee764d976e0. 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/QM4TX2352316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf68f7955190887dd3ce40b37520f80fad05aacf5b4762e159ba641219481c96. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMDA72257802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387a525da3f57d4c72c505666dd6790394702acac93e8fe4900baf2658ed606. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM4TW2359999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cc5d4c7ec116872de95eecc5223852805af66d01c3f481910cbb91b9d21361. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX2352327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae11222966de9c54024ce4ef5bc367ae1dc5e2a7ee7ac1de788d90376fd3e66. 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/QM4TX2352329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501ff3ff4499b9c10cde9606d92a864a2321bbbbad044368931440d5aeaac83. 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/QM6MZ2453514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00600699a5b73b6c9c0cb9a02faffe227933e7a07d2e2271f800aed182f20e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6MZ2486744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cd6e272351cefbe1520f3c0f1b4c9d6a97bf96c575be97eb28d5145dcd2446. 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/QM6MZ2486747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418e7292a640620833d8acfd7604e5ff841e7f70f2c3f0fab897200c7bb8493. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QMBZ92457788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da4f001051cf4b433685ec8eafbc6c946a6c01ad5fbdc5f70f4f2b57feef7a. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QMBZ92457789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e682fc338e1398adc1d36cd2e030442b89bf29a87cad00012ef8beaebf0490. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QMBZ92457790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16064cfb5887f71817f8a271a98b62d57f02c989d43d9d21ce7d4d299a139fb9. 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/QMBZ92457791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f9afdd401d384d0b6a5a6d35f7cfa932e260cb2e53ddf4ccef90fb19a50229. 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/QM6P42580718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c3f2017881d27b609435bbbcea52afde08761ca83666d46927517afcfaebb. 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/FR96X2470083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63c3f2017881d27b609435bbbcea52afde08761ca83666d46927517afcfaebb. 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/FR96X2470083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890fd4104721b1485f6da7b1b9da34f8403c4854a1c5acadc77b4bfc11a8fb6b. 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/RUB422101750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b22f535014eb174b89dd7923d42c52f6a848eba8ad4d9c42058e82dbe7de5. 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/RUAGV2404713.