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 0x7ea64184dcc6e19974ee2cf1db2ee04ebe744197b46f6812c713e3a41a8b70fc. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1b3f5e-e4ca-46c8-a90b-093b002cc150.json and https://artists.proofprofile.net/proofs/artist/be1b3f5e-e4ca-46c8-a90b-093b002cc150.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 0x0574a5264275c5a828b3d95ea663d9eebc133d4bc344e9f7f1f4073be0d50bac. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6L2356179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b6170c9393908ac8bad5bc35055f2c17860a4b64cebd7ab53fae35ccee0f85. 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/QZES52437908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80c840abbcab2bf12fbc86f565c980ed1cbcbc00e817eec581b95039c757b58. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN52413030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a81ba32d2368f281fc2ab39ab5ef65b703c6322c76e1f7556d22a650684048b. 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/QZK6F2470108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9e96388fe9dd5c18d98d801324d8c30f98b20f5854c1458d279e4900eafe4d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:58Z), 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/QZNWZ2435902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c819bf76158768101e1d2e3c30161c01d5644dafee5d03aaa5ca5bd60e3bc1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB22422765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f97aae3fae77b36fb8d07b0b6885190d076188547d2cc02371c337f6902ff2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBC2449206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8d7342cad485e3591f2f921025a1d8013ce28d7eba73e4460b5fd3b1b7961. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES92598037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d9e21b4e43d003536f07a87429f48a199421db83ad1b44c885a3e97f51d55e. 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/QZES92598038.