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 0x17b081a385d0350012f9481d7264c6588519fcdaa254292a4e5dd45cbe134abf. 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/4732f18f-ecd4-4877-9994-bb867fd6f3b9.json and https://artists.proofprofile.net/proofs/artist/4732f18f-ecd4-4877-9994-bb867fd6f3b9.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 0x6b83365790e746eadd8ef1aecea41314072821e21f0cd33f6461eb576f60e31a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCFUT2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11c79c22633745cc0dbfaa0bd795e6c83d54adbde20d1c276274b67e662f4f. 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/BXOMB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc4744ff0776c2a9c0c296bdd542e58ff1c99e50e4b8141c4a57e4ef1e67d5. 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/BCD592300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069016cb4fccc01ad501f11748878fbe22b8787f979fdf91f05b8b5d2f6f87c4. 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/BCCN42300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e0ab660669d94d9fbd887ca281e249d494ff5564a06deab19c3d852312d1f5. 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/BCQAB2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5df513d8f07005549a4e8cb2bd6c303455647299819962766c231395d0c9cf. 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/BCDFI2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9285fd337b02aa17f21bec7090f3cc15562deba9142c7724c1a5861fad6596. 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/BKDP52300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5767d1ef89ae5a4593a167c55337ac4d4630b5dad128fc551d2375167952757. 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/BCCN42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343. 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/BCO3K2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1588d1e6c91c212f253f752f5190e47dc55ac8ebac5f9258dcee18dd83543f22. 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/BCO3K2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3847b4779df273254eb261de2a30eec8a093bbcd5daebfc80ab7011cda9a93f0. 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/BCFUT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d2f1d8877d62e858cd3daaa35212a07c0c5cb53a4b780d9baa9adb3a9f3f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRUM72102225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15408edd4941a3a469604bb86d3a724e1453e0c0025cf80b402db8e9d4f3fc. 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/BCFUT2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfef60de31269a5cdf551bd2289572dfec5cfb53ba53ac295da1ac058a15be3. 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/BCFUT2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9109f03d57665a250127ab36ae6b9e8a262443ea2f5b786cb848788c59a7cd2. 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/BCFUT2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22334dee76468e3edbc13454e5ebf1f5cd2c5c779b6afbcfea805a3f8b9333e. 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/BCFUT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36804d377374c0fd53399be3786e5f8a9230e33876b1380cd643915ff69e86b6. 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/BXPWW2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14773181e018dbc576f490da57bfeb89bea72b8b6664128f18ef2774d9c4e91b. 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/BX15N2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15cefb450f7900638887643f2af6a27070f8b0684e4664f181df63c0ff65ea2. 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/QZGLS1906641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4d2ad4f6a3dda67e02c9e9494cd867a0712e66477db02a08196611393ce96. 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/BX15N2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed511eef2ac1e767561b5f8a1c916422cc92b8fa4b5981f33e8c07048f70c73. 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/BX15N2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cec2e24eecea159d4da3cc81fe0997c2f508fbe75c846fcb1b3c04e98b445a. 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/BKDYW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012ba9f1099ade7694a90d44746e82cc1b9ec0b1678c98f14a0f30aaa66a5759. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BCO3K2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343. 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/BCO3K2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bdf638b8ae83ac624f75adf80f9875790d06910ed4f6ceae94e3430f5bb14. 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/BCO3K2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33932b4c0ca71d35502b81a6b585077338dce5b98b8fe39acdc5b6176deb59. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BKPN32500142.