Sinden may refer to: Sinden (surname) Sinden Light Gun, a video game controller 10369 Sinden, a main-belt asteroid The Count & Sinden, a British music duo Pesindhèn, Javanese female solo singer See
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 0x6a9538f14afc4a10ad543ef9fd2c6ba54a44028559cac309405f1a3252d91048. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c112f03-783a-4dde-8ec8-87bee68d9a1c.json and https://artists.proofprofile.net/proofs/artist/3c112f03-783a-4dde-8ec8-87bee68d9a1c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a48295df2cb6a7af579b52bb4ccbb1c4a6f199d396d32d8ce2d8be8a46a33f. 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/USYBL1600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d3fbcaf2e4bd197a7e0fc9ade376beeef316ab7a67b2bd7a6eb6c3b58dc426. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUDCB1600801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e0cd7862128fbe5e7b06062800751dbaee2163e04daf51e8634e4301d8fc5. 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/USLZJ1594567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d325f20469fd392027d4d83dce3ccd26197a180cdf5cd84688b3fac24f1a2ea. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/IDA881913298.
Medley: Sentir Lengo Putro / Sri Huning / Tombo Kangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0534f157e4090ab38acec0ab762ba8b4158ab70419eb91c7603cb0d3bc8646e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IDA881913297.
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 0x428f3b33f8ee089d66425a1f1d668ee5c3a5d9c55d41f507c88b729101bec21a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCPZ1916246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbe3ad9181255b78dd70040c2d696e08220390c4add8ba3d7eb3cf6dc86aef7. 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/CA5KR1914446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168140e3bd40863501c85fbb2b69fe416196e189ef32a065a5c2eda706b2d3f3. 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/CA5KR1914447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a50fbc59c8f549b8a5eb77da81efbcd0611ac082c2fe3635193ed6ea6b4679. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USYBL1701165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269178bc9078ed532b2e1b979a97fe75c25cd36ed33d184b1d649858906e99c3. 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/USLD91701290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8fbfb8c801603609e71ba9b48ccb61d966af8ee6f320da69001e63b4b4e717. 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/USLD91701291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cf571c4cdc5c2df8ccca46a89f2d0637398e0aeb53c06d26ba4028cb34f1dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USYBL1500475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef9c56919539eefcedc7593b06092f84513c97b402db36599c5da9fccd63ca9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USYBL1500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea61514ec7379f4aec7be43a378aea61df57632c31ecee8a2a88b63f3643cc26. 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/USYBL1500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dafbc54006d80c039ceb0fbc82707c3556c441d64f767156271051d116a42f. 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/GBQLP1200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bde9ebf9d04d16163d8bf543d4a3be6237f8360cf05a609639c7eac304a5b8c. 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/GB8QJ1000076.