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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afb2c49ec5937b3f623ea0b211cb82854b19b69a505f0ee9ccc83b108a4d3f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a96d3b2-3582-4f07-bef5-41370445ec55.json and https://artists.proofprofile.net/proofs/artist/4a96d3b2-3582-4f07-bef5-41370445ec55.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf873345b7e5fadfb9c54190a5a4750e1c3cedc6e5385ec8571cfb52a9e15dda9. 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/USUYG1050565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa150fedaa8692427dd5ca0fa9411336d9caac3ab0779c7052629350fbd8c6809. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:10:26Z), 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/USUYG1115567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e04f9401956799bf28f493506c34c4389937ff35a7067bd649588ccffb016c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCGH1700910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba3b9a1c5d29644095764ac09cb0f6a9f88298dc1da54dc529d831d9fa59c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21736021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815b007cb7b2ddfbf36826e52254df8e60f28cd5d8a32161a675d5bb13a32374. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGH1821872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc030c4cf0d62ba39032ffc9ba15830d27e4796ae70c24c35250243d1c8ddecc. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USDY41860940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3044a87cdda0d1f73b8d98c6d11cc19010c33afbc56752430e06689c6db592b5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USLZJ1933138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c8583b25c2e6db0db4083c5aa25c240fec95f34f46ee9b1e8772735a22b4b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBWUL1949383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e063cb9dc2b2f5fdef32bbec7943fdbaffc90bfb1c2ec52a76bb02ac8957ef. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX282080122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236eabc2fffefafbbc779fcb3ecec18cb5bde2e2de79420b8befc82a1f110ff4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZVEM2366469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24edfdcea31ad2d85ac84657080cf26ae2b92f855a2aca1e8e501f0f6d5f28eb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPEW2440535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3195c20f1610ec4a119d765097a2310b893a7b78a70f0920bda863d6ba207451. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:45Z), 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/QZWV32456514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeabc39745691b8be045e1eae2cd7358f0a10a34455d7e7c48848063a1f1ae95. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:40Z), 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/QZZ8B2468243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078189cef95bbf95c9ab4b99baadd287a4af4350a870b96293742c7452f33952. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZZ8B2468252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff652ffc8625c65641f6116ac11902b13fcefba19e9bcbe09fc7df5167aeb67. 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/FRP7S1800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb75c53ca959870f5ccc7c606f937f526fde8429c8df0f2c82a3052a47fd2f. 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/FRP7S1600390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ffc58e169187a17db92990d73c5a7673602dcbc6ea7c7d25ffffb82dc48245. 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/QZFZ22104417.
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