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 0x0a66d39476900d04e66d8044ba88d0b43b73a84615e90a5499f0187ee952d3e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3cac9f-007c-4a36-b89c-ab9434710bd2.json and https://artists.proofprofile.net/proofs/artist/ba3cac9f-007c-4a36-b89c-ab9434710bd2.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 0x8d26d067b379e6f0023972a8490f0c88011fc897bf4065be747bc2a28c8a8ce0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72101016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f2ad40c3ccf4195a433c5ad1684e75b45fbef07623c02ceaa079d2cc93da1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72101017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a38175d27d1d7547b74d39f4270e94bd52d7d5b32c45b8649ef45e87c1cf6. 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/CZUM72101018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bf80cb49361926df3205cd6bd11d60cc16624fe8171151e99afaccdf6fa702. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72101019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a63297f16d5d0fbc5928df0086e7687a56f2e285aadda043bec19b581a47d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a84aee4ad159c1e47cf1dc752e8eb074769594b529aa7ce62344aebb9e17897. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72101021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d56207b7dd924f39d0b288b61bd69234cfec3c2a996fdbd1c03d7fbd2c713aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc148a88fb9520799d855f95034247d37116febcbfea656a3c9f084d3dc3c9d. 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/CZUM72101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67daffa3f31108ad994815dcf4fb52f40655b84d9a6e09c7a1a05d10e4a8a506. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72101024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1c441ad5571da861f9f384f2c7d819bab428ea3aff74386f26e76f8c9453f. 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/CZUM72101025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f168c055a429471b691a962ce555364c134142dec917a5a720412f3400e73bb. 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/CZUM72101026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e6dd0646245d844aeeca17908e268ba1b7d5f13bb1e0b5d0ed27f5c4f7f03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72101027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699065b320b193c68aa1cf2d0804792b60bd866b5a610b5c77cbd20b34d7e2a8. 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/CZUM72101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e11571c75a30a3c7d1327173cf0ac22670b42af044812a449bbcc5591bd727. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWV2159656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a7ecd10376133cce32c4f287549e3e8d0a7cbc78aff14d9835def7bf5d2486. 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/CZUM72101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f0ba790b606ffba3d0e619026d2db2daa1f0ab69aa17fc7b413e3fd6a2929a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93504b5dd01a180a8bd264786fc410010e8d6295baf2f36e2a7f55a29af7bc2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0310e1e70eed4886ce32fd6ca5afd755efe8affb51fe678302ed8d7e72a1b1b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901aef162fcfabe9336e7a3ee5e17a9ee72ff1295c3d02cbc21468a9a7275399. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc09587bf3741f6f2db197ef4bdb0d20acd393b6294997c44c61fab17d39a73f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188f7544f33b01eb9237f5b7b0122b3a897e509b7e0cf44555eec3cce143f1f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080f50e12bc80869fd6e3ce109bb1f3c59c6298d7f1a59af8eb5ada54d95483c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73baf8bd79ef4b85c4ccc05f5bd71dcbb60ef3bda9d1d0f694976cc72e6694db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2109e5b58da7e273412f10f01bcffb80d9496d2798c5c652ccba114ad2168a. 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/CZUM72300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e88f303752b561024ac27df8cf4635e2f177632acd5a554cd2960e89363764. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8371f95aab03752c05d3576be23e54b6b7777050f5e98bc3ecd4fef2c2c3782. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f6b87bef6b2116e4e68f39ae0438fafb82064b7f06333ed2289520324ee01. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade85a2ce345643cebf462657753a30c4b8ce933f4cbc56e48bf344f90546594. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CZUM72401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc02d0241dad43d4e135610e6e64a22d243902e3178873b17ef2a6874357a9b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9c60f3d6f6ffdec27436b3d46bd4c071370093a2562b8c681f8d552f88fe92. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72200811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ce49f6b1977ad7d68df157ba7d8cf851f38687d6052a204a0cbd3f5f4b1f9. 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/CZUM72300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ce49f6b1977ad7d68df157ba7d8cf851f38687d6052a204a0cbd3f5f4b1f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc0d8cc5ec7c70e63adf0f117307574d735caf9774c5473ea5a2c49b5fdf9f. 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/CZUM72200266.