thumb|The classical Punjabi tragedy of Heer Ranjha, one of the four classic tragedies of Punjabi folklore; the tragedy's epic form by Waris Shah is regarded as one of the greatest pieces of Punjabi li
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 0xf31f9968bb0cc836ed7bb10afd4c496f1c1dd4bacd3061af8541bc777df15c93. 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/b92c35da-6fa8-4564-8f8c-5ba9998f6dab.json and https://artists.proofprofile.net/proofs/artist/b92c35da-6fa8-4564-8f8c-5ba9998f6dab.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 0x7505a4ac36d576cadabf2978acb2266073bcf97e2bd7cfafa111bd72d24f563d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USQY51046967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d7c8196fd4b39c3b72a6fccee682f25dc8b5469be93aad9c620db39567c5c0. 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/USQY51046970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25985b1d0aa043be261ed4045d114e27b8ffb453d3c3034ec8f152b1edaf16bd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:43Z), 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/USQY51046971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce6c85edfd43bef9664e5a5e94c72a5e23ecf49b5551c2376f08f18a7e8d80. 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/USQY51046972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4677a58c0438bf449aaba843fa98e5dc9f5a3b7eee4ad8c9cec1dd17113abd59. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:01Z), 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/USQY51046973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fbdf3ca4d66ba4a1cebff2e2f489d9ff2dbadab63c4bd6f8928f7d470d7256. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USQY51046974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90fafda4a45bd51146a708769478a3590e5e43104bae1d5ed8319460f72bd4. 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/USQY51046975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1354ae00105e55abd2c193ebb9bb2a80ec5bc869784db17e403e2f5f826622. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USQY51046976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcca4ffe9b66acd9c6781de7e027611590c39d7d96603e2798f1314e12ced1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USQY51046977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509161f35a6f2e8d1677dbc1c1a4aca12d349416a9f6df99758dc9407cf7c1b7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:18Z), 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/USQY51046978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6425fd30ad7284410b4add90266e972d9b226fdde96d7ee35fc4329b28ce57e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USQY51046979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e66e82c80612ca1dc1918e5887f4758d98a8cb744c10a6544df2e9026441982. 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/USQY51046980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0d156ae533ad3a16f56141570bc7bf0d3900dd72b40dbc588a2f19ac12f2d. 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/USQY51046984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb494621b898db28b2b3ddda0323dad996516819aa23df3227fae2c23feb15c9b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USQY51046986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d77d59777dff28982cdfd83e2300351a4224f91b16851e0fdc3f1e65fb9e13. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:42Z), 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/USQY51046987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e81f58a57b44d50d327274f2e2d4fef419d0e67040ad3ef2d685b7a3c74aea2. 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/USQY51046989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b43b59d440144fc4714a4cf0fb8b967d18893e53918f2b4b73870b71e8934. 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/USQY51046990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1903ccbcbe2297ed5373ee053e07fc8897626cf46120db306ed114b74e0a180f. 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/USQY51046991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d84e3e3ec62b490b259fc495c67a79c36483f1406205eac45d8cdbe9dd5a1. 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/USQY51046992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332ec8981fb8804e6a2843019a74d03835dd341a3933388094c5c0ef3b4b31cb. 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/USQY51046994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa90902dccba3637c726001af185223c86a432affb5bec0a256b31b1bb1ef7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USQY51046995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3777196dea8a04676f49fa417e3cfb6c9f2209b7fdeee4a18c976f2c996e29f5. 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/USQY51046996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e957880833f4612a185bbb862aeb59cc6be9ed265ec13d54c6a4fb63fc0b3fc. 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/USQY51046997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61f43e33c1a3d5a01723af6b767072f33151b5a7200817aaa231628fcb9acb. 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/USQY51046998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddabbc5f15865372a8f4b338770563aa9dc5dd98da6057a5167f72d95bef9fc. 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/USQY51046999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f527085c76acf730bda2111bbf374a9daa5137f41ed9d1639a8459eb96e5cf. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:54Z), 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/USQY51047000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1561033ea3d245b6bf760ca3c279652e8dc66c142ffad31723533f77bdae8. 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/USQY51047001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6a202415ded97c868673141acaf2f8847e62ac4f6f071ffa1ba42369693dc. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USQY51047002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8434230ed11bdba76e4a5ed2e88c29cdcecd67586d11579f1df6389a7e7d8bfd. 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/USQY51047003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64855ded1eeec8d848771a4dac52af57e238ab976c1b50258254083883bc534c. 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/USQY51276676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b5101fa7988560dd4420eaf9b886347bb15e2652303f39547d3c3ef8032e91. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:15Z), 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/USQY51276677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9f64f759d97a1f62ee5f1bfeda1ff6d6dbaeab4e266e241a0400cbd0f04bed. 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/USQY51276678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d989c6c3506a37c68899327817c9618734aaf3e9160791d32914cffb8ca56. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USQY51276679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc0a7364d80429bbb900ac373c7563949235fbb259535fe715b276b2d74ec2c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:11Z), 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/USQY51276681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d15a5d6890e9cae296d81b2812bc4ab703da5290d9da32e69681e11881aa2b. 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/USA2P1867253.