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 0x17d8f47fd4f0ca59976f0c9310014db39c71e983b54c87ee0953f802479568be. 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/0aba9449-0b9b-4a71-bf70-7ca46bd78bcc.json and https://artists.proofprofile.net/proofs/artist/0aba9449-0b9b-4a71-bf70-7ca46bd78bcc.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 0x2eb9ed2cc1bd312c55fa6b7ab7c71cc76e4b843b438a865328b836e866b6100f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QM4TX1552917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef8f03a88247f62a1fe09ae371323726e8ff348089274ff8c3523f5fd59f53c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM4TX1552925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1922e05e442479c74c8bc5c0da44c24bb83692b51aa217af684d4beca84cdae4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAMX60800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2223c56f4943dd19208223341c011e4e7bc6edee99197b650472a2be02f5ede3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAMX60800007.
Kulak Misafiri – Events in Small Chambers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e603c844d1b0558762ac37a327471e53c8925f614ee9fb617db54207c99cf3c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TRA170300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13a388b7237508548f772d0a115a86de7149ad477c4d942cecdb8bdb2286ed. 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/DETP61600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5620e617ac7775772c012696be245b7098e474a060043bae2977c237973bd8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DETP61600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee670b258bd2c7b605923e093eb19fceb8f349bb7210ea4e2b1d6289180422c. 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/TCAAZ1172593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf25bf24e2a9aeaa523859f877b1edb15be57126682b76aa2865d83e0439a4. 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/TCAAZ1172597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab86a9c8eaad3020f63f240d740d4afd5fec96d0554b2cb9601dd72adf21fd1. 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/TCAAZ1172599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57404f4a142304105b8c9cbf4c15f60fddb354ebdfe8eb5b3c0ea3c4362bbb2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAAZ1172609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ccc01098fb7d138319f8b5bb74604f05c025d07788aca27cd92c750283778. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAAZ1172623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcbf67dac5300b57679f707f1fbf880c6e4fbaae4b3799536c19aacd88d0f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0330603226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf593f4e784231ec968f59a968e3d03bcba1936df1f5cce35a89169b515c05ff3. 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/TR0330603225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537b3857652eff9657cc4d9e674b11b2c91acf1b04bbfa36b2274a018279b3ed. 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/TR0330603222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ffb34bd1cedc03eaf5ef240c82eea47e3ac63777e86bff2d375f572d81b95c. 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/TR0330603221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193ea2f5dff118d97c8c73d746dce30e1aca76a33a999685d55422a0c525c237. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TR0330603218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec998c24e4b03c65d64a8224aec5e2ae4bd5ca73a8f43ad1904245832deb6d1e. 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/TR0330603217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21c4dec02f98203d14c45404b1e61d816ce4ef7d475140b87a2323fce45a1c7. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TR0330603216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b839c17ec3e0fd2fc24b5d2e75912c579e3a2da01079d58ea112588e420ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0330603215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8431fdc38a974bed03ace565006d92f9c73a6cf3d221f7c07bf86f5dfa9d9f9b. 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/TR0330603214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee2aa80a660563f35c99edc14c134ea139ebee924184a1689eae934ae69806f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0330603213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f62d218087443642e4d47e26dae4231c128e1581c9a2a165c90f319ae8775e0. 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/DETP61700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a07d1605ec0cf1434186e0f490f51c4fc716ffad6bc3f6967b0237efadc3ec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DETP61700085.