Didar Sandhu was a noted Punjabi folk singer and songwriter from Punjab, India. He used to tie a turban on stage. He mostly sang duets with various noted Punjabi singers like Surinder Kaur and Amar No
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 0x8f551c035f42f6881e53ec738c6f6d461395a944529cf445f45baf918ecdd9ba. 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/cca806f9-7a9b-42b2-9742-f45ee3886adb.json and https://artists.proofprofile.net/proofs/artist/cca806f9-7a9b-42b2-9742-f45ee3886adb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Didar Sandhu And Baljit Kaur Bali Punjabi Folk Songs
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 0x5d3ad582800c177dad9632875e880b16012565c1d12c8adc431707ed44bbf0de. 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/INH101000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b2f1171d3d3f3117f8cad00afeb65d29479f666c8d10cc981d23bd6c97b4b. 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/INH109931390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4143193cc181536c54ddc3c108e6551db4c4f49cb5cd5c1050672c181e95d72. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:28:18Z), 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/INH109931410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2654eca3fc345365f44f55e80ed3ae2247b45efaa2b9b7dd9fe36338d9d687. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/INH109931500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924cf9e5fa288c4d39e8e4cc18f23404819880570d8c33d56f742ed2d3d0b414. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INH100494370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edffa390e4b813cc900d8f7b9155e5c7ed07c953fec7ca913d7fa77fa60e408. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INH109931420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d64e1b79e8f845e5741f95841436c2a04c6b752643666e8879f14af6379329. 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/INH109931440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910fe91d8d2ca25f68674d1cca01dc642db26d319146268cb3a77c7d93b5b247. 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/INH109931470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68821739b9a2d7bfec711b6171b6a1cd8c6a0e281f5b938d705e68fd61658e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:58Z), 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/INH109931480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0406c5fd6efd08a104fad4fd5c20192b2994b11f1e81f9f957426b756269189f. 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/INH109931510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f3824fe9e93d24ec0bf73d2a39d1626515c1e6c3fe8d90e53c41c24c93d7ef. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:49Z), 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/INH109931530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7773d9a54a4473684ce3635017b9f22edd0d80cbaafa7091f812a8aa81e81ec2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:38Z), 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/INH100614231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b18656638bfb151fb8100d103d3e5b893bf2e1dc19382e82fa4f7476614027. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:23:06Z), 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/INH100614232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba5fb299f35becb3e59ac002976095a3232a9d559f48e6b0d400534c629c88e. 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/INH100614235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531de62be28528a7279eacfe49c13fdb6d6c21846fbed9c61b17e6dc513ce74. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/INH100614236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8212afd94d3b6e4f2b1f9719e6a54828354c4bc618f870b7a908d02a5ba3ff0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GB3SA1000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a8e821856c377df50234f6b23de24a06975763b6c57064d228bfaed3df4261. 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/GB3SA1000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d73647e0a78a9b25ee4ef53230d1a26cd772649b97e430219b09dcd971cd8c. 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/GB3SA1000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb29634a694e0e1a061b072c414bfff5e0f86633ebe2267f23d994b9041576. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:55Z), 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/GB3SA1000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4723c1f5d4524f724cb6d1fd877e47f9719da1bb2f101da7b59beea5027680. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GB3SA1000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418736fb22890a2055bb0b17bd93d4cf7f20f35782613bd39a22005bdd84e6a2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:47:10Z), 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/INH100806299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19462e559ba21e7b944de0eef57cb459a1e03de926b24771f42a2584f3e61582. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/INH101002847.