A yer is either of two letters in Cyrillic alphabets, ъ (ѥръ, jerŭ) and ь (ѥрь, jerĭ). The Glagolitic alphabet used, as respective counterparts, the letters 13px (Ⱏ) and 13px (Ⱐ). They originally rep
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 0xc5e08678508a69a900cca619f3e5329d89816aa10ba3c67c92e8c98cf9625af2. 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/d12a8068-b94c-43aa-b855-15ab2fc7cfb8.json and https://artists.proofprofile.net/proofs/artist/d12a8068-b94c-43aa-b855-15ab2fc7cfb8.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 0xc5fb2b756d28548ae9510793be770c64867848ff6e7f13b795e9e1bd2d7dfe79. 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/QZFYY2042599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938643091b805e18d88f622f3ac94fefcb06ecf02f00ad1adcd310cf462250e2. 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/ES71G2013068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0178f5b7183d9ae448fc59e7343eef70027c8be64bcd7ce2d244d41117bd80. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2017299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc619c9343cb359813003b8ad8033e0f0069073073d5c8685309804a89e6dc158. 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/ES71G2029645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c42c0a882f0548fb65e23163992f7a0376920230ecaf669588dfc7a91b662b. 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/ES71G2035774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9760ca5499eb924e9af607d42fb76c760c0f8f7b70a7eea43c22161b5bd44018. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/ES71G2041352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe023c00db453646b380cd829de77dd1360335c24ce91b046acaf78001de72b3a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G2055139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596754e3a891c32222cb30e2cabca38fcd15c77f26ec9e1f95ac5bcf3c9112b6. 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/ES71G2114490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08211471184dee85ce05646666a714b8329fe001cfe39ac31786a93fbc8a73e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES71G2124395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4c039206a4d786c9cd32e40fe88b49cc54e83421b9daf0195aaedebcd9dc9e. 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/QZN882167547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ed09246ceb2751dfc320bf3346522d29060eb969a9e172195d4161dbd81241. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:41:26Z), 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/ES71G2210677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a488828a84f4556219475fc5993d7935f6c8049a4700dddc5a82d2a7ed8bf2b. 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/ES71G2223171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b77f01b0376fe65fb46db6335a50195e9b6cc7a00f936ccc5dbcf223966e51. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ES71G2409719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af259138b982eb590caa5aeb3ac14cbc377084ca63cb379013da908ab20110d. 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/UKXN21959773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42451e7a03da6023009b9bfe158ef81248491ab53317e2a2b664e6b74c9521. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLPF0266111.