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 0xc62cae8d5866d5ca811416d941f11a72942d3b3f55ec9cfae87db9e9cee96f66. 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/1b8c4140-636d-4458-8f60-6d059f80e2bc.json and https://artists.proofprofile.net/proofs/artist/1b8c4140-636d-4458-8f60-6d059f80e2bc.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 0xead774c88b4f16e6d88b4f9c79bd0893af989a6f413e67a7065b4413dd6b2838. 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/NLGM11901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9496635f50c1fb2a9417d33ed937ea97e027e543740f49e9b9cc1969be1c42. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NLGM11901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff82e156cfeef070c9fe1ee7e10f42f7faa5a91dd2f2b6163be0e0688b0bb9f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLGM11901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6289c2b65bc53874e4b4312aa6915ae480724154377b03a19c3ecd044a98ec5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:42Z), 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/NLGM11901103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22da2e225ac28c1cf2d12161374e065227bc78f6c73efd6a8d74d1b35e5b60d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:45Z), 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/NLGM11901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8473576a74f79d27c3a124ba85713593cd733b4054061c73c271d3c91bcce5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLGM11901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6595323247af56ccebcd1c937af90d3ad89738acb727c21f3044c390f43568b9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:49Z), 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/NLGM11901106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6228e8195ad08f5cb1b33a2c646e46195cf9a42ec35f7286865fd0e231c693a6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLGM11901107.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262785c79802fd954b9dfdb1f9fcbf21532254187905cdb55915db34c403778. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/NLGM11907832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cfab39414e845f4165d38109053ba30ee577aea04724ae21fb5c2432faa104. 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/NLGM11908020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499e4e99cd6f0b18ff45f554b05888cd074b7f21110dee80df43d8928536bb7a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLGM12202190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1154b7222c1a6bffe19e52731b7cf98cc06fe729fd39fccd900c3bafd255643. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:42Z), 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/NLGM12202196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09ef068e29b70f22d2bb021924dde8628cf0896669eaa50511f996dceef749. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLGM11922800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287dd3acb8d39eed94e0341559d16dd486405d67963a2dff711e50d4ff5e51a2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLGM11922802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e8849098ab9dad233445534ae36c237be66012aba615a0dc7a56a780392252. 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/NLGM11922801.
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Sonatina in F 1st mov. F An H 5 Allegro assai