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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 0xee3e0c2a6625b8274258110ca7935667370764baa94d5083e4e86759149c7d75. 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/08a23bbc-9909-4966-b61c-23239d1e5a55.json and https://artists.proofprofile.net/proofs/artist/08a23bbc-9909-4966-b61c-23239d1e5a55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gwendoline (Umwelt & Traumstadt remixes)
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 0xba0cf847e45f1f221e78024f631929b0c2f7f031668ff005859fd4014d801c8f. 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/FR10S2251867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01905cf213b85c1df5838e65e423ea13c2070f4250ff04dbc0e99e32d81d7573. 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/NLCK42216705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a686258f148dfbdc61d6df188e596deaf37b7974f3ca2945e857638c9288d33. 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/SGA901988039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac2ec6ef169db1d18a3a18760ca6eff4faf5a4d40bc878404edfa800c0f2329. 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/SGA901988040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf335de89f9123fe583efe7191a27321abdd7d4b292b41734d866424bf87023e. 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/SGA901988043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2273dd930e6a5fcf023a0203d8160027609382890631099fd0fec7e154a56d32. 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/DEPE51680101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f516150654de01a3e454185c67de79d835973c923bd2848238b473bc79e0ae7. 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/NLCK42226524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b251b2ba2d625488d899f5fb8f753e3e10194c1e4b51f135829298f510ef32e. 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/NLCK42226525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d41b0f03946e83e201851c813cbcb9d2a7b823b9b9610694c8d93e7d011c57. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:57:20Z), 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/NLCK42226527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74104caf0f56ec901e68e5988604cc786d6fe39af00650301012397de9ec4cca. 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/DGA092217386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee49cbfa109a07ab792f470862c1d104fa1114b5315f0d4c7e3b9b07e0b819a. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:10:53Z), 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/DEPI82215907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1efc533d22822393ad705831f7f9a531249e02f8569bdcc207ec856d19f070. 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/SGA902188080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb1cd13e9c9c94cbb56574164f0c3b987a26f9a221f9077270dda6494590058. 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/FR26V2033366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f5fedb1751f2425d321fe66f0972714cf44ec59dd51425f02676372610e92. 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/FR26V2033367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a705a649017f9fccb0ff18ceee206c38a434412f37d96aeebd31a845c14ca73. 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/FR26V2033368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ae2890b531d239cf625a6f1b673df9bdcfa13221a709e3097b23e760d38f3. 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/FR26V2033369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d8c778d2f0fde4c76d300d4e8d3e6a3304abaf41197b944dc96824100002a. 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/FR26V2058474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fc01d7457c1a7c85e9245f28b3acd36374aa9746c99dd26eb94f654a0a3fd0. 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/CA5KR1532639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd63e10bb795d92e07357fd4d5379d72d34de914d4eabc878033d75c9423e2ae. 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/CA5KR1532641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e55a87a083169d7648ed78f16362fc16b20a7ee039c56a99fc2c10ba16b1628. 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/FR96X2190662.