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 0xd11e88984fdbb71113f8de1a899e9ec8cea96384d262fa33febbf5eb7ab2d2a0. 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/0f30909f-1d6c-44a9-8ac5-f9d1b26af865.json and https://artists.proofprofile.net/proofs/artist/0f30909f-1d6c-44a9-8ac5-f9d1b26af865.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 0xeae7cbe36c06b123e99c44d1b32f467d05ec86b3274b75eb8a820cc06d6b3ef2. 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/SEAOF0002050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d49449178081f3f5a9cab96a6a6a6764f0197adeeafb5d48bd89618cbfced4. 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/SEAOF0001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c53ed40e1764e2457d6ea2582ae1e66554d7e97d9ae62396c66bc6c56c3ab03. 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/SEAOF0002030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5dd8657df4eb9da2e8458fabfebfa55122a01c60c19e3390aefe55662ee350. 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/SEAOF0201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b30812de9209c1a1409ae32b78b0453edcd927bb3f7cfdafa5dbddde762887f. 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/SEAOF0201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1f28032c5be1ce54da91335c9179567a9cc5faabe899c545df4b555c73720b. 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/SEAOF0101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb11cb2d01230323a59461558ac81f1c25eae5a373f895d662f7bd181d58a0. 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/SEAOF0101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bacecc049541b1a4fb4dfbe9660d29dc07253a107ad66dcc76b6ce96276dd89. 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/SEAOF0201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fac5d09cf7803e25b53040b693855439b71483ddd846b4bc49edb0ab04c11a7. 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/SEAOF0101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae92e262c4261858c387a7ae7e6a4a4c9397ffb375e3fb2a651edb855e0897d6. 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/SEAOF0101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b35eb290bc35e4e2acc1e4d8379f61bee27b626b40222f118b1e2d7800458. 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/SEAOF0201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2771588c6964e72c68035d46fb847ecf58dfcfb835b6fa475573ce2f8c097a. 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/SEAOF0002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283d76407c899d07a6fb51d30e91f4a556ba13a9343ad3961e5c37b67f29f70. 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/SEAOF0201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99141cca290576d9f8ad1d37ab8e80b446de7fa7cdd5c3a0051e8b7d292cab. 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/SEAOF0002070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5427eb5e5651f5ef8218b8ddce800180fdc3c5e4bf7506613fc43dc483cc1384. 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/SEAOF0201140.