1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xd69f501afbafdca794d22b06c63b79f6de93200a599e430b57e446a471435b89. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27cd1b4f-20f3-4825-9127-95dfd7b64854.json and https://artists.proofprofile.net/proofs/artist/27cd1b4f-20f3-4825-9127-95dfd7b64854.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 → block OTSBitcoinBlock must exist at that height 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 0x66caf9e0a1798d4059a5eaed265f2d6977cb1c22386b1902406e2bb2d3bab2e4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG731568097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14136e682a7ab39f25a8db6c9517824f296a88453288f227f96b035029ecaa8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG731568147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96dad9cb644b9329ca873d3a2c9d45a39663b322e53cbb61f27f5330f1b8d78. 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/HKG731567571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dc6881fe64ad857c773e1a65fa64ac1e67ed77e258ec01b489af98be45a47d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ172100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd805ac8ebc01c14527382baab4f0444ac83a2e8ecdbab335ce3c8e40d4d4e. 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/TWU712101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c6d5bdf5087d44a5e336b60f0fb5c358df1caed7e48815402c8bf801b788e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWU712101023.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4596adedbe244cef5bf08a8bcef659d713480d4da8312bace51ebcc92038757. 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/TWU712106516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daa61e44e3ddfca1bf5d6d5c1f1845ed44bb7b1694ae1f07771871fa6823288. 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/TWU712106532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c655eb8b57bdbe89fd300bd651326b947849fab3dbd4ced75ee1fe275b12f88. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWU712106534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6faddf7ac4ec577655f03456c8a3a57857de90635601bb013492faccf518c8d. 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/TWU712106547.