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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d38d3c8b997305578968594d9c3ff8e6d347a3a1ee4dfb3bf8e7b520ceb6fa. 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/dce2bab5-8139-4ace-928b-a588b1623d15.json and https://artists.proofprofile.net/proofs/artist/dce2bab5-8139-4ace-928b-a588b1623d15.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92eb00e2d465120de3cdfaa0a93c3c6aabdc61a84dc614ee7809b28453499ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEP2161200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33095d06886a473cd0e402d10182f33b0c52f6cdc31d135ed5c76ab19fa5add. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZW9K2325205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373d67d3d33438a5ac62c25efcc9ef0e6bd356c0a105315155d520591d8a9e78. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTPX2362041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995af9a4e035fff80deaae60db2655116ff182631497f5262f2c8d8b93793f16. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNJZ2384235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33095d06886a473cd0e402d10182f33b0c52f6cdc31d135ed5c76ab19fa5add. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZW9K2325205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392304f12475573ed4028cb418df50c146e8813d5f57972c1406dd12991c789f. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZW9L2323988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eca1c347123f487f61b5be04614da8f791f05ddd9c8ded92542a43963039cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2323982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e916b1335c197f6f666de5924fcfc1692c319f074a62b04c6b6fe4b9569e1aa. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZW9L2323983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81837d13bb7360f392635c72495383ec613aa0581258b0b3983c1703710177e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2323984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc5e927b8ed23d5693f2976ac9c9f190167625aef57ffe315b25ab7337c638. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2323985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12da5b63b217c0a081973643a6998bba65d19298b9647f904c647804fab78e44. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZW9L2323986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe6ec1dfb7e4c1c7e857c579563b6c63843b1fb662b534f5557dc63e15f9e47. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2323987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d955038c5dc67bfbfb333acef646bd2e1fac776c985355080f70acf079b0e1a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ22347810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772c593e6a6e4cc39622541a30b9a55af62a74f1b78eeacc5dde14ce32534eed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2303469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8253fdd885cd98bee5b410553b127a158ca25dc3f49dc5ef2758d51a73196fea. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6H2123144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e9a230db1de58e2e01af285198ef7a96b86eb79c01f566b32f81d32652927. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTVM2125557.
Geisha (feat. La Sede, Tane, Alblack, Julito Yao & DirtyBwoi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ac0992b34dec6cd2a317025e57019c2ab21b9397e74cfcf03a4093316cb40. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZZOPM2239913.
Deja Wopi (feat. Alblack, Julito Yao, Kid Lucilfer & Dieglock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494745d7f7be7303fd89a15d4b2a10d520d2f4fff9946dc1d56a4ee1bea4f76b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZZOPM2239916.
Maipu (feat. Julito Yao, Alblack & Kuroh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe341b11082fb273c99e664a5f9a94075a1bc21a57e925f7973796b101fc938fa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZZOPM2239917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c14fee2a8671d55821ccf3268902b2d29eb96ebac19099614d78890d07bc4e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA72526120.