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 0x8919af8b57a6804ed290552a8b6f6e1e3f35a4054e6b2a2799a7a899ca79ad8c. 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/dd701493-7af4-4d57-93f5-d63eece4263a.json and https://artists.proofprofile.net/proofs/artist/dd701493-7af4-4d57-93f5-d63eece4263a.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 0x94b26708d3c29faa80eaff57e55dfac94d3198ce5cdd8635f2ac3f92c411dc5f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLB171000667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851cfa06408964a771085101e6aa6aee9974f2950008303a42599ef158c1343d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLB171000669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e2d086e8389f5e4c0d384471dd5ada53f033755d0c4b761be81c8a4d4d13c4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/PLB171000680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fb85979691d504c802bd9d441a869c08d1fce2180fec40c2c4bed7231ef796. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/PLB171000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb0f49125229e733225323012ce23bd64614d604c1b1bf04971d4969bcb3d69. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PLB171000599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc5df26d951da48541a39e4bcd204c903d21305e33f336aec478b1728d574aa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLB171000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7554826739c2a329e563cb2a143a92e40ba92b15b04f5ceec394ed90a8ac49. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PLB170701856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee06735a9331655e1a012a18263c77c5a989e2995ef0dcf81a8b107ea5b0e3de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLB170701858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a52280b48f1016069be42b5398292541ce503176806b38b2d344c2f06819319. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLB170701859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735bf334d32125dd2899ad5efd051e8951263512f2643d17dcfa6ae460505b24. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLB170701861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5287a1ed250bcd8c387ceda1f08f3a379691e2241a67b549bcf066974b11b1af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLB170701862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc728a56274236791158581aeb48831279eb439a9f6630fd07608206906b648. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/PLB170701863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb191b539231f80d8f1c337c268d208a9b20a73374de60e976f761ae312d95f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLB170701864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d94ee20bf9a9200f6d0d0d7020db9b190e2396fc3c4503182c46e9d0bc3cc6f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/PLB170701845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e0688b5c45e0654e4df656f25efd38e5083f9c95aa95579dbb5a6523b6f70. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/PLB170701852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86bcfb89796e78ef36ff444f25bda02d4781471e637d7cc31c6c0a438b9f57. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PLB170500182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042a6bd6f255e6335b79ebf7c5bdb54997815eb6a0717f7e7a40a5ffcddffbe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLB170500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c430cd5b59372027762d9571520ff6e3bc31d81def24282a313faa0a0bb272. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PLB170500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9004d191277125cb95c6d16bce9ab66c2b7ebd86d004f741642702f896aee452. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/PLB170500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb857c7a01090ae59a79cb9da5eb2049adfc352669f42a9c1c1638aa033b75eb. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/PLR862300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe069ba63ee63f6e22989e334b151c1e76a7883c85e379c7bf97128936fc9473e. 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/PLR862300422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80efe7684afb58f2cb3376abd0a91c6d4a7cafc0ba61ae9818de83ba6f998fdc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/PLR862300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73f84750df5cf074d0a1dadaee31a821d16b3337f5f011a2a8970af01039edf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PLR862300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd6a40f5ace910ae6d94b577bec23ad44bec2f4c791e35fb74f0105ea08824. 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/PLR862300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b98ba1f2080a91a64f7eff7b5fd6bc80298a5e049b3e37adabd08ae04475fd. 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/PLR862300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ad15a3a9e0eb5d8ed3f70a6a05a75855775714643323c327300e93b30b28b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLR862300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1beecb32a066eadc5ca0d452b5bbc7c901a74a650c9ff589b3fc1e5717c62be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLR862400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9831a4bd3e9177398fd3ab7cd9a176800fd2feb5001ad366bc838a7e0b09143a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLR862400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691aa1f1bf5a5a713526bedcb4c7a02f07b295666c99db244ab303f3074ca056. 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/PLB171100337.