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 0x6961396e37a10202976368569c6d8c22620f39733f171e7d5c1298be8dbf062d. 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/c300eca1-276f-496b-9e21-142f34ef228c.json and https://artists.proofprofile.net/proofs/artist/c300eca1-276f-496b-9e21-142f34ef228c.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 0xac2c310c8d22b61550f91ffc1000d2bc0993fac621b2168de9f26e29869b4bf4. 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/QZTB22300943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8961ccef074a0eb61cb413556a11ebc3b9aa2e0f6dff709f1e156da33bc159dc. 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/QZTB22300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be56cf13ab9d407f1ae832e19717ca5d5b2c0d045974ff473fc72634278c85. 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/QZTB22300945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5206dea3d3e9b79f395eaf0a310f7127078e32f2f02a70e6f5efe4c85b962d. 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/QZTB22300946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16da61f2a1df6dc9d9758f532cc15728e67590ab7f1304c5029541363f36c654. 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/QZTB22300947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5819eddacd9fcf6650ae1f9d72fc59607d77f794ceaaf69080c5d0f5e7f54d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB22300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e5dd0bcd7172354a62ddfc56a2f239102e472ce4e14663b532fe0435d02687. 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/QZTB22300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f620e0437a1a1bd4f762a428076a5f81cba1f49200821ced84e70aa3374ef8. 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/QZTB22300966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f0b9d0b02dd34ce537a534ad8e6dbe5f1597b6338261ef9cabe938a4a88f6. 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/QZTB22300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85acd95d8a2268e58d71f8033fd922a1e42abcf07dd22860af3929452fd84a19. 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/QZTB22300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f8264b8a13cf2ccd976c05c1c4fecc9aa4b5719470d196eea4a38c0eff11d. 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/QZTB22300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45555e06dc89641e3791365335b885c1bccdfef5da9fe550301263a180491eb8. 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/QZTB22300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fdf201d15f711f5058bc7c0a197f23c88796d1c9a5275b1b40e77b4f6fdf13. 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/TCAHJ2390133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9384c5e1affceffd783c09df54234409fdc4691d09b11182762dcb3afbfabf34. 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/TCAHJ2390199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb95b3fb72d18dd89a7169719735a7622a90dface8bce89b42e303f19cb76303. 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/TCAHJ2390240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea06b102d841152906514c57a3916de357e4ec097de625fe97d7868fefac353e. 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/TCAHJ2390284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21588d1ff0ed122f7aaf1e18da3fd494d8b7f1a15cae90179ad9860f74a4d54. 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/TCAHJ2390308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aca9a53a3f234292f057c90a8df704ff54a5c5ae99ca7adaea14f6615af474. 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/TCAHJ2390319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c50acbcc9f45c3d2e2843078135b1b0f46d8ba335843d561fa61bde5fbd613. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ62499678.
Tribute to Chief Engr. Sunday & Mrs. Agbonlahor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e1ea3124c0771894ba931e286d5dcf7319783061a24549d443626723c8168b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZFZ62439133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69af7da9a3dc7f73f968616bff9d0c199e1cdae7764041b53986af57a73da8. 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/TCAHC2349482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa6184bc4f6cd1a966d0f7359ae873491f25b95fca7740a0dbd041861f740ab. 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/TCAGW2325449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594db8da00967659582a67711cd113d299249df1bc9a9ba17468dbab2d4f7c7. 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/TCAGW2302369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb60b8be335f41bf84725bfba730e4ad39c0991b49674b1f97545b3cee6f2f9. 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/QZPLS2250951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9a1d9f18540701e187b62baf74c980e189b4eed0b61fbc4c1080209f320c2c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNWZ2266357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc35cafb3ec4a183be7344477d7204b8e6677c16b56bb7fabbdaac22dbb270f0. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZNWZ2264397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8864e08db78c8e99a4a692dcf348b9c8e27999bdf1eccb7f967c3f227a66f2ee. 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/QZMER2245405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48071f0630be617afcf4a911c7ddedaccbc668a91f50c98da70d3b0b2eb5d47. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAGG2247302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b22d96b69782f59a7314e3373b17ef5982aa5cbd274129d2f1a8e2798e2eb. 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/TCAGF2256152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d1853f29dabdd8d16ca4a9633a30ef07495455016408c2010256ed5bf27efa. 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/TCAGF2246230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021e26ae222bdf9c541333aec2a984da5a098fc99dce53091f6e84428992589. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM92431140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab22cced8dcac22fbb87d2c81ee65c7e604d624dccf65ff46aa067bdc90d355e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM92431141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2345d23e2556aaf8ed4b5665d66bbd32f372ce78c05c82594e45fa724ae193f. 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/USHM92431142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c75845504c15b3f6d721d070525d8c08c2cc70293cc80b0f30455ff3f3c983. 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/USHM92431143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd28e6a4e83a59f8245aad1df107e369f9e4523fefe7db3bb05e6aa5e19f94. 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/USHM92431145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e860154f69c81e435fd34a521cecd8eeb311cab45f19d89ab7072875c1eeb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM92431146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdbccfe31c9aa4e11e254d54c5bd5ec8145f3c1086c310d4481f305c2c1d4ba. 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/USHM92431147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0633787f9c169e1be852ddd2e772ca65313298fb4f816bc56b87812268b78ee0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM92431150.