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 0x97675f1e4450f457c64dc010aaefe8a5868b49ae986e7bde183547a615beceb5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41cb7df4-9c86-4a88-a63f-e8dfbaef9e13.json and https://artists.proofprofile.net/proofs/artist/41cb7df4-9c86-4a88-a63f-e8dfbaef9e13.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 0x74298eaf0b9e41be82c1662c00e220c3e45691592949a74d2c82b9f35f8664bc. 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/ITGKW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d88da047865c0a47e9d7d2539fed1f45111d109e64716422e65743e14b42cd. 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/TCAHR2306229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a29c56c44d62f019cb3f65435ead9baf6ee9a5c94828d71b282b7fd5c45412. 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/TCAJG2513843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c7223760ceeed4eae446ff795ffd3bf396b00e0823034f31648e28aeaa5d8. 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/TCAJC2410034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5275d26f4eef37e020504b6f1ca912167582986139285d3a609091166b6bb7f4. 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/TCAHW2429733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d33adcb017f711edaf4bbf47ccfcf9c22df3dcb8ad30dce6d205618c327ad4. 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/ITGKW2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071a14b456028ccee3847840bbdbb1f189859f7c2f1f34298b697b7ca0ec386. 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/TCAGX2331418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57026f834fa08873aeedc952d7571f584fc54b2f3a2cc41ec6f6dcbf405f6b01. 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/TCAGU2322594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58d648896cb8022352ae56509d45bdc5a26fe8755aeecacd5a4a45f7148f80. 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/TCAGR2241832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237304c8570c8543425f24b27c670b086241878b1989fbc8c2099a0f34c4d485. 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/TCAFA2088123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054bb73b5ce49a9a04a61fa595f7ca548f58fb05bd136c67841ece5800df5d80. 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/QZNWT2076077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce433a5e900dc6db5972d2a55bd07fa2491f51116ac5e4d753b29026752c385. 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/TCAJI2536967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e266c1a21a2115b769d8ec82836fb03c13fa0922b730c694c93121b39977d3b. 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/TCAJJ2534530.