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 0x55080fcf4f9dc76fffbee88d21db789caa34b7c2c6c3c5849eff7a68685f811d. 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/0262bfef-0a20-484f-b838-7b26df53e6d9.json and https://artists.proofprofile.net/proofs/artist/0262bfef-0a20-484f-b838-7b26df53e6d9.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 0xc5d4122d94761501f4991f0dff640f94200fcbfe1a3ce4cb4bfa440aecc1dbf4. 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/QZBRF1839017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4db3d337b7d20d2879637643d4cda3fb9c9b6997d84c6017ac69f90e21a45f. 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/QZBRF1839020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa900d8aa8b72fb9a444fd3b3a383ee7e038bf3991d88aa2819221a4643f940bf. 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/UST8K1796004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b05545e5c446b3ecfd63933f4666136fcac357558862012cf6a8263fd5e5e. 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/UST8K1796007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05da43d616b9761f240612e6dc21b838aa87b6c4c679bfb219fd78fe0bcebf7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/UST8K1796010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a143ba988183abfb37496d015d9a72bd4a9aa687867d2be9bf55a65b63cb7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZBRF1849525.
Um Azhagana Kangal (Karunaiyin Pravaagam 5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baefe09de4303059dd0bd43ee08e2470018fecf6234a535081f31b0d55abd5b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMPKX1773639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db7592d7d0c16d2599b7c766dce2dffd5f3ab650a3edccdd00d950fcb64edb1. 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/QMPKX1773640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59979af81bc7b8439ace33f12d5c1c29b588fe37bd696898a1ed0f77665a8fd7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZHNC1981988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941e1e6c4a9cd4bfd9fa9016cd0c1093dc864e297dbe9b7e9ce308331ea9f1b. 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/QZK6Q2065970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbd0b976452fae1f8f6824adf4bf29ae6dc93d49b4c42f2b656c0d9e08a164. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6L2032024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6002e8f69424f3bae8f0df4650008305ff530cb227bdc098bd8db945602bebd. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZES62156135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a24bc3df33c91aed8cca10b55abcb33ab5bf62b4f1df4de8231cd14e68823d8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN52189409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e40bd8d0ec9599a3c86ef3d5c8151e6bc6a8da69245ce60d94f5caa8fd9671. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6L2141065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15f6b3d7a2b7453849ecaf1752b0265c4ad6d5953b989a991df49d7fd122121. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWQ2180578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063537e4e9257c644ee45b91b7dc8826129da8e504e2dcdc28a9d1a7c8afb4c. 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/QZPLR2148251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7676c320cfe2191d57a8505679da4ea11081ed6f6cabc4c273c78bb31b787c66. 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/QZFZ42284197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f5e5051e4eb4c7c5a4f0f9f475c6befc890bbf72590853c6181e953c1ef99. 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/QZFZ72289694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2d572b1d813f18283ef2b39d85e38f3d57f4f08a0acf7216bf32692cbaf8ca. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZES62263618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8e27878393395099da8b5002e8b5e141aca9735551a9b56aad13b01cd637bd. 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/QZHN32292004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6801ddf92dbef87066994eaccb9d61e14cdf17f8cfa06e2f674bf70ceaf44658. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZNWW2212370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccbd7fcd02e362a8bc9aeb0b90adff78660a715ad50be13b8a38eb19295d780. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZPLS2291766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546bfc5569d5393e3c278b14be90c54cfb12da5e9971414005c96b81d1760cbd. 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/QZTAT2257109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600f5a620abe65adccf77784da8a28d6354481cba7a09b7ffddcae9f4fb7a7c. 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/QZHN62321643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d89a5f76ef549f8177683d04efbed01022e696f379b4a48dab903de71b8f9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZK6P2488961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e819a787ccc13866c30b27446aad8fbd1321ebf4fcabf53956adbb1f9bf5bd6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7M2410795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe077c9df4990fe5b58d5b43c15e7b428266d80163ede404ce28887992645e80f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA62511728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16818a7689c856d4dfb31b818a4e6bab201c7f81d345c2ec8f6a00121595b7c1. 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/QZHNC2541522.