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 0x60e7a51a322ac91fc04f7c5de8c78486be0d7295f6d988dddd6c72fb9d83539c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a06d0f-5a10-4c31-985c-0796a4c108fa.json and https://artists.proofprofile.net/proofs/artist/e9a06d0f-5a10-4c31-985c-0796a4c108fa.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 0xd39839685a0a08e5e16a0597b4f4e18b4340d317d2162cece0779fdc79a9e3c9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:24:24Z), 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/QMAAK2306954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da36c9f318765e69dcfb4d65f5b557ff19d1ea7e5a4ef8524ca9bc626423209. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:00Z), 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/QMAAK2306955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58a8273372eb72e84da248038e30e68456f11eb9daeb4cb9708c937c6cfb47. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMAAK2306959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b18ee9c56a9da49182d08688d6fda30ba4b0f1953a6052bbf0c17bf620d1c4. 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/QMAAK2306960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e2300198a0e534542fd4aa211038706d7f76c90f0f26440f2f68c1e8bf6512. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QMAAK2306961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5742202cc1b0f663e515c66ec6f9ce6ecd3bc6f02b844798e25b1d898f5524a0. 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/QMAAK2377423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627e2870e34553398666a6b432e7ae2e489e40d9035a9b857de7c37b19d2030. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMAAK2377424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5a2bc3006a9b0a853881bc2ecc71a8eb9610b2964685413fcab55d35263015. 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/QMAAK2377425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31651e96df4341ed1e99a8e81b026f17b7d80955849bf3c3035d3561d1e1ed88. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMAAK2377427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fea85ff61aaaac4a1aff4cfd6777346c1f7f56dd2f3866cb381bf6bda0acaf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMAAK2377428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093937277e9faf3bdb52f0d9fa6086fdda062e359f64d632f0a98892dad2f2d0. 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/QMAAK2377429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d9125ab003886a3e2911e650ca9404478585f024452dd6c2b2d9b2c5ca48d3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMAAK2377430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba55c326ea8eefae14c8353560421443bed9818c0919da19c3ed669955a3f0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USX9P2491718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ab8bff39b95d65fb14ce453641b84e11900982291603d16896c1a8d68e833. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USX9P2491719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7519de29939fa3a276f056ef9c4f619df004a48bd4bc88c927b0d644781a6ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USX9P2491720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e76709528246d0ff623148ff373c42fc1cb93bcb11b507b6d6b8bbf32fa98. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX9P2491722.