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 0x9eac0cffd4fba363c8c8a70cbcd201295b61dc868caeffab75baee3d06c911ff. 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/8135935b-057c-49d8-820c-539c7e6b5c79.json and https://artists.proofprofile.net/proofs/artist/8135935b-057c-49d8-820c-539c7e6b5c79.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 0x5b0cacbb95d56722d1b98912d3abd4871ab739883f11d73e23ed19e76702f74a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE6HN2253140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181bb4d36bc66e41200546f5ed92f7ec498ddc8db3e618fe9733f3a280b288c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE6SA2278179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59915572fff789eb2c2cf2acc0463b82f4c980ddaaffd5db34584a2ba5456d5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XY2201187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3df967af173e3cfbbe3477dfd07cf031bb6793f13edcc0888cc61ea829aa5. 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/SE6SA2275786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62f070aa05444766b43aa9c64c2ba980269bb7f3de81c43a75162e36a8b9231. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SE5BU2348206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494078f6df7a1cbf32337e9d29556777611c719992e81acbbb3eba71494269b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE5BU2348188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f1ba0f7412adce471b6457efc22d55104d632030650322658036cd2aa1496. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SE5BU2331495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316ea845cb51b73f8fb8a0a92f25b58a2ca5e1da46097d73bd65887d6ec0643. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5BU2348162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38400bafc70a4063384c87441d944271a8fa4374816968e0765ef1f41d6aafb. 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/SE6QE2306137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ee80892ac802f824122161507448f0913b85fa1ee4b569c4b976c89493dfc9. 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/SE6QE2306142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f117db2c5a8c8f9a134f21ba2b3b5e6f3f5b5a8dcfaaaa7891a8fcd09a4d160. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6SA2313154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f1a0d6ddb898326064faecd1439b943257f3e6508ebadef290b304bfa62e1. 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/SE6TI2385012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb76d68103bb1438439802595a31f743e4ee3e78834bcf4a5c7c89860702271b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE6TI2363370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c61ae1cf8397a6081a9df0a4f29382d6f59909bd45b531a93c20cf484ca747. 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/QZS7J2374063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac0e4d5828424d781480032ec31e41c75a00c435390dfde0fbf655659a3fc0a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZS7J2349870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac0e4d5828424d781480032ec31e41c75a00c435390dfde0fbf655659a3fc0a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZS7J2349870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ebab86a052a09702da4c28c77356d4e8dd858e8f606fc3eafa8d83c023975. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE66N2344612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af247dc1d0912527cd2070eed1f0aa4dcb5cc19dcb508254d3ebec4451e031. 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/SE66N2382102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebaec0f7ee89077565a5a5b2956e6b0979a6f7cd1946602dac3ce58dc212036. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6XX2393478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353dd4b3c3c82461778b99589813f38ce9a9f5533b027ff15985b993352943ab. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SE5BU2428536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e306f5ba382ffd85750679afaba81fa209ed04c85732fc7ed4fd8f75d87bd5. 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/SE5BU2492980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b189f37f51d2265ed44fd7eb4aaa1c9d86b45adf1ba53fb3f77931aa340333. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6QE2492316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23810c5999bb800d36c05ebe3b9c32b9510ba4d03180a3a480137f3e012fa98. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE6QE2492317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1b90895ac855eeb17443027bfe46f9b75f5f34acd30ecb7a7080928427dc6. 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/SE5BU2535074.