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 0x33f546f0c3b786877d08f392223863880cccc5addcc1260417f0a0fd17a04916. 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/ebb03c41-6231-48f6-9512-fc39c48bf5c5.json and https://artists.proofprofile.net/proofs/artist/ebb03c41-6231-48f6-9512-fc39c48bf5c5.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 0xd52f4fa99dbe3f160284da2462bc81406a0a0a8394fa161978cafc49c3a591bb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:48:20Z), 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/GBSMU8496049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa06c120a7cc3ae4e128b3c072dddd0e09f9c5f3f23225ed03add31e2fc1e2d. 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/GBSMU8496050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ffa6d6df9f7ba76b605b14d686817e5b3f34e191723fcdac12e9ff8b6ff9b2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GX3HH2116766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceafecafd2773929edda4f9152df0e93be34908eca83aa0ac545c0ba021b6afb. 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/GX3HH2116767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37018dca5b773b00014a851794fa64e96bc635d407d37abf7f68db62a95ced3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX3HH2116768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40101763850d111864d5a5d2b0c9c1b7aaa389a7eabe23ab0eececf79eb041. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3HH2116773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a7ea648d36831a0240e1a4c9edb7a68f00b420257b0f9b7b4ebdc193c9dc5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3HH2116778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b233a1c7168f32c277da1a96f9c8fcf2c0a01ad97c3d36f74e8dfcd33fee1e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWT2313915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b233a1c7168f32c277da1a96f9c8fcf2c0a01ad97c3d36f74e8dfcd33fee1e. 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/QZNWT2313915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850a405e6ce9dba7c020ea3121086e66758736f2fc20e438b09149e25caf347c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6N2435136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df819f9c7a6989e328c996cf588e6334674640bcbaeafc6bbe4fe642c9d411. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:49Z), 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/QZTBC2567122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda3460b5afb0782d28f09a22024941cd449148eb49d18dd1be1fb3515ed6095. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7N2569396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b1bc0771d76f9a9714119313c335637edef323180941bb03a52a615e86085d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:36Z), 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/QT3EZ2534719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22d8bd6859dbd1afe2d9aaf251f776eb6a566b9cd90f93ed2bc302c39c0083. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:00:13Z), 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/QT6E52590481.