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 0xde05c320dd7ffb7b89fc0c6fe58d7fd4bb550edc17604085b48c51ec5f6fc252. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f47459-0c72-423b-947a-ff63f7b7cd7e.json and https://artists.proofprofile.net/proofs/artist/f0f47459-0c72-423b-947a-ff63f7b7cd7e.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 0x456489aba944c234f6f41bb8fa13ba9150147a4eb5e0afc1a51383ca2905c31d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q1843854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1cbf8c2879a41a5063da2635ea04b75ff0e027e3e37c16c31e7e5fe6d918b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US92U1901550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7029c7a3ab04fce225c078be64f6ac8c3251bb8909e6e0b38d6ae33265f39131. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US92U1902292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f85f63bbbb563b1d747d8bb180749d42d451aefd57db8601927551a2af3553. 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/US92U1902707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c58820e62930f5fdcc286fe5322e86067c7500cec1bcc8d4676f8698e1653. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US92U1903299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f85f63bbbb563b1d747d8bb180749d42d451aefd57db8601927551a2af3553. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US92U1902707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50141452b3462e25ae1aab52bdda50dfc7355d6fd5ff3d16040a79c00234eb55. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US92U1903806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04694f304aeaa65a25c351ab81c0633ccf1ba097e6f8b9494cb5c77860e4a78f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US92U1904871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503ffc2b0133d816d0955de800737e92e05b869cdc45cc7c6fd936069efa32e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US92U1905521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50141452b3462e25ae1aab52bdda50dfc7355d6fd5ff3d16040a79c00234eb55. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US92U1903806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04694f304aeaa65a25c351ab81c0633ccf1ba097e6f8b9494cb5c77860e4a78f. 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/US92U1904871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503ffc2b0133d816d0955de800737e92e05b869cdc45cc7c6fd936069efa32e. 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/US92U1905521.