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 0x74ed263ff5dc1d3386a76cf38f5b5a6ed19c21d3948efa5f92173fda7c482b3e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0de6603-fb62-4a1f-ade1-9b36a16ddca9.json and https://artists.proofprofile.net/proofs/artist/c0de6603-fb62-4a1f-ade1-9b36a16ddca9.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 0xd84b6491e1babb9b62180a1f1c1dc17190c27e7c43defd404cc2c385b7f6b4e7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ARZ020801502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049fd4f2baf4fdffa6401923516a88daee1a5aa22b53ee01f76ee74e8c477550. 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/ARZ020801503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea4ac37c855ac1832cfeb52d1500a3fb7f3cea3562e0b99666034cc4dd6d2a5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ARZ020801504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec422533974d0da018b809ced26a016a5b6e0112f97728091c4116fa9b00057. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ARZ020801505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16f4d18248530293882fe5cb9aaf5be2be104e59da86b1a3dcf7a6d82cc30be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARZ020801506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ae090a5ce617680bd71ace81fae9990675bc005e9c520968be443eadf913f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ARZ020800562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a99c6037b75ff6f54af80a3d241e39d13feca426e883774c4ef001f554dd8b0. 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/ARZ020801508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f1d6e5aa6377b18750af53582bd68d712277d74dde59f0c0dde3d6d4136f47. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ARZ020801510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9ae7f923e7237367183b4a92baec153f76c63fb391e28e4ab37e365c2b6851. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARZ020800559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb34884e5d95cfad7eb810c6ecbee60f907e2395a768398b6e8aa3db0cd7661. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:26Z), 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/ARZ020800560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c5972ffbe80025a4270db6fed9a11dbb1c978fc8049a2fc4279cf4ea6b7b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARZ020800561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab74f1821da094da86d364d1ca84dde6653609903236115e1b0d3a093a48e88. 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/ARZ020800556.