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 0x18c478f18f4c55e9e5bf2fe967b0419e128de125fde88e1535c1e72917d6fa44. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f5aa38c-5c92-42d6-9216-459de989d55d.json and https://artists.proofprofile.net/proofs/artist/3f5aa38c-5c92-42d6-9216-459de989d55d.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 0x7a3458a869e9c5632738af0783cdcd5909e9be0ec54893a948e7bd4b0be58678. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/USA2P2243302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf764f391385a2ac5b416aa7da373324d282742636a9e48dd1b246801e00ffad4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:38Z), 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/USA2P2243304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61a62d6867249cd78545084ad882cb6dd05ee50ce081fb751157d70fe93d64. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2243308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc726aec9c14d6bf5e4c36128cc60cf11cf5aae704bf2d506c33123b5f33ae31e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA2P2243313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70100a97019ff7843ead673c6339027b245e1e5377a890afd36d56127c9a29f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2P2243476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c57e71668f6881b7f559b874f1018c20a798bb2ae3f91fcabe86bd0f776a074. 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/USA2P2243477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5338706bf4eaed292feb9a1542d55293c89dec507b7cc9bb3ca65c42e74f8. 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/USA2P2243479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2f2a6ba092996386d530b8812746a37ef2817a7b0f5f1ae089f5f27e0ca78. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P2243480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0b8f388ddf223ce982871b98e55bddfe139421fd5e945717e20a8cc0681c6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA2P2243483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6000616f4a2c74a56c5391949f267b02f15fb43d7a0675426ec1fedfb19a207. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2243485.