Chingiz Sadykhov (), also spelled Sadikhov or Sadighov (5 April 1929, in Baku – 30 December 2017, in California), was a Soviet and Azerbaijani musician and pianist. He was active in Baku and San Franc
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 0x44fa4ec73c6f75e564a810226dbecb3b3a63b70cde84672006dc597f601d20df. 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/ff6790ce-6f08-4c49-a2e5-0feba3be29c3.json and https://artists.proofprofile.net/proofs/artist/ff6790ce-6f08-4c49-a2e5-0feba3be29c3.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 0x841f6226e4fbfffef5e0484b6ec2acbf17d9de9333f8d39f404f727584f1d14c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA560543584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab60b1df7c4059c751e997410fd4925ff82a0c39021ee372a53cc766daae031. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:29:11Z), 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/USA560543585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1915c567912be602d9c3cf435f3a541e03e3f1945631e52140150fc580b8686c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USA560543587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8841f90f68752d64705a2ec2c1f0618444c4e1040285daf96031102dec41806f. 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/GBSMU4659667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0053bd8b69f874881df34277c12852d8fa304c3825407ac237e9430f4c33e98. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSMU4659668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e325f77ccf9cdbb2427adb5d7390f6050decd49b4bd1933a7f57a067c075c. 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/GBSMU4659671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456133fa0e5d1e7b9a0f674f246d5bd98c53465d583426a6734caba863f6cd39. 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/GBSMU4659672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa060652a0129e5fec06ea80065c0b2c08c2a86e151d6d9641667c9e059ae0a43. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBSMU4659675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8fd06ce405778a3d660e75d5484f5fc66d6c63c4649f7f5f4db7f6f00f0dca. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:41:13Z), 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/GBSMU4659676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de9fdfde765ac53d7aef87d34e644ca516c678a692de38007ad6e1a6052268a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IELOI2017540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f998896ef9e8da2eb25de1ea1f09645b136d429aed39db3d65dd8e8d390d6bd. 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/USHM21981558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb17631639b89668493ed369d89bc9eb1057666621ed63e0cbfad2126e9ce2d. 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/USHM21981560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daafa842e2877452c4c020ae6fbca4924ec2ed6a1061b22c5591e1d16cf1ca5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM21981562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa036f3750ecfe6d5a8d69003a9a888a18b3812a12cc8cfdf63daae87d6e19e. 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/USHM21981563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f432e442fd7696371e1518ebeac90ff049b456b8c9084b6b74f594f1e505d. 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/USHM21981564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c0af95668475ae0eb487aa2c7847beee00e9b1130a7845787690b97f7aaed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM21981565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ef11a3e658770f99de5801f395988a756376edeab4f8f31b7145702d1da00. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM21981559.
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 0xc1a5f720392c52b01b8a8fdad434b68a504c6821b0670ebf142d2e0abf169589. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM21981561.