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 0x59188964456df4de87331ef52c3469ea5a16633f003dd43bb58ca37261336d6b. 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/4a26c82e-4315-4371-bff0-b50aef9b7791.json and https://artists.proofprofile.net/proofs/artist/4a26c82e-4315-4371-bff0-b50aef9b7791.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 0x4dfc6bc1f1bb0945e5c5c59d2fdf0a2619fcfbf723c42b8a18adf0567897ce76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2204301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f1c3301f666172fd8d9247a54f5e6cc5d8c60ea1cfc073cf15d890d981b5e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2394930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc3e262f685ed57875f06534506cb88a3e04f62550ba8aabd5ecb86fa79982. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1ZN2302352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7c7b85c04cf8a90a09bb08cfb6ddc56a959afcce49419e273460d580b1ad19. 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/NL1ZN2302336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886fa0505c2ef461498612e0f4306a0fdf370eaaa9a3464290147c2489cd521e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBTDG1302694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663df4e2697848bb010f0e263e35c96b49cb661789a458d3d980d27484f1d5c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBTDG1302546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a8bc2a1b09f015a9c4f489b9f0ab06e2aadbaf9ee8814ddcbaba2e6f38fcc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2252436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2184230d89b2d6c71c0b9354cffa2f2d7aed92cdf2948ebc1d029a19736cd3. 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/CA5KR2252437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e8d1e59f4cdb35cd659689196ccb627ba4b9eef98010a108e930bef129f595. 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/CA5KR2204627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf365868e0036b0a22f69087849918f6dee75fe4a7e95d76e14284a8ef89d3812. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c0458944e70ed34d4e7178a9556c2fe2b21e97b6b7cc6ea2aa8514137e5fd. 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/CA5KR2160438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7275140605982546e59943523d2c9ec891a69ec8dfa7f6a1c99d684420cf21. 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/CA5KR2160440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6b2617218ecaeeecd3e86f72b5659c4123ea190e6bfb20c8ef3a4109790fc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2131514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff139a37cf5e7f596fca477e48eeeb928b6a41f0565510af35cf0c3d2547f8. 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/CA5KR2131515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a5ec3fef99c06e9b2f6d8e1f4cb07f16e51af592971ce503d65768b44dcc65. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2127959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef891e5cf8540ce7216a59f7c13de620749022f937ac11191aa0a374b6d50e8e. 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/QZNWU2003034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a746cbcfa0347ac64cb4d20784d54802c093d0074963132c302ef29562bc0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542078551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc4201bcd1a1dbc29887790a962a9f044392b929fed09f4634bfca2dd99253. 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/CA5KR2008926.