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 0x698cb60902ff5df7672754961a94f12f91e6205d3cd41e21f8cb5641148e4cb8. 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/c74309d3-b34b-406e-9409-3d6d9cfe98d1.json and https://artists.proofprofile.net/proofs/artist/c74309d3-b34b-406e-9409-3d6d9cfe98d1.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 0x8fce1148e878752a7bde1193ae9131f7291b18f2a23c964627f1f36eb2c6550e. 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/BCL662300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e770c160df40737f75e1a090b57bda59d8ed842c0408004b328432a5d5240. 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/BCL662200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc267f090190ad56123e8fdaedde3bdc1ca72d08c6c6f0d8e9337606c2ce7413a. 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/QZNJY2246789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e421de82f0d2561f92540a9d3596928b94d7de959a8bf4f8ff0dd1a6a5e8cb8. 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/BCL662400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460e30fe564a4c850341dae3d9caff85c655e099c7364f3c0c5ca8f4a2f38f51. 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/BCL662400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d8d6f2cf3f6b7a375d05c88454a1456dca239fca7db2aa69af95c09619fe18. 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/BCL662400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd031552701cd338dbe99edec5a71f0daa3efdb8fcffa7596648b13de6a3be19a. 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/BCL662400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd0c71b0e8728e1ccd52bbf54d98ba1be540ce62f808cbb3961002b387208c. 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/BCL662400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9d7df71efdcc0d64ad45ffc825bcf78dd8e40db3372be9208af69e83a8186. 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/BCL662400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1cfda6fa8f35dd52f13fc8062d236b8aa59ca053180711850f5176351a66eb. 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/BCL662400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fa802b30b3930d33d08c2330624fc5949d60ccfe2905585e8944bc40951d78. 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/BCL662400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97aba3871e54f98dde3d498c2d5f2b6b34428c96be600cb30c11d41d057bb72. 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/BCL662400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e42c6776c5cf61d0b289151dc6e963612c4a76e4a28f12a4ad07eca92cc0be. 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/BCL662400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9d7df71efdcc0d64ad45ffc825bcf78dd8e40db3372be9208af69e83a8186. 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/BCL662400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ead8cf618d018bd31031f9d14abc5283e7fd096f8c09dfe88aec5e95cb7999. 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/BCL662400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f37a4dfd6cb5b6b014799c39b513e2ab9005b9e22d37d094c61275dd5175598. 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/BCL662400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303727b132ac212bf3cfd0d6eee24bcd0ab6a002b1f5963760c04cd0f009899. 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/BCL662400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589d25c3d46d93e72064b7da844c7ee64c6849d79249532e5eae7db7ec7ba78. 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/BCL662400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46652b706bd5a664025f1771e6d95db4da7d0bc3a46e53f5031bb48e97baab. 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/BXRK32300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4b52e8ad6c0d53b0aa0b803342f7a0f48dffc46f4740823020d4db56cbe9d8. 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/BX2I82500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af8b53eefb16a48092ac0823afa5d8af759cf427bbcd446a655c370296b0e42. 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/BX2I82500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f1de139c8f5432f2cf3a53046a3697da499a78a0fe7923be27a748f23cbcbf. 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/BCL662500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849ebb88d0d049b4fe21f6a608efb1ca8bd4315cb05c60f032038206f1773619. 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/BX2I82500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe833f19f90a0efb13d7e3c9c51b8eb24e4baeab5643bb9eb2796b8958fe203d0. 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/BCL662500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb696dc0be898b45af376ac59741e16871ed1d31ab45eec6cead4251080a6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCL662500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd4c3d76423feb7cc1bad6e7e88e5ab5bb4e605d9b196653f3df6c8d622c7b. 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/BCL662500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a26ce2d5b5ad37029776be076dce5583e064e726b167776ea90c8b3ab723ad. 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/BCL662500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cbbd2722f9f29cb6828e44c32203a776618753503fdc5a730dbffb047a6079. 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/BCL662500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13307436cd14deeb74a11bc2a5667970636f4d1b5bfafb843d7d70049541f86f. 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/BCL662500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78add1ff1a2c2b0833156b7865fbb1c5c67e991c22a1f4299cb537b97e15953b. 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/QZW9L2307219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ca31476535a625720f3178ddd82ef8b9f620f454a5d353af6b2b9c07401384. 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/BCL662200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0674943bc43caa9e03ac06cb49a97a0e51526f3e998e2dbbb8ef983e76139a6b. 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/BCL662100018.