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 0x6913b3514fa9660273cf0eb8f271df78ea00ea6f6beaab8852b1afb635011a44. 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/51845645-60f3-496a-a4aa-31a025445d24.json and https://artists.proofprofile.net/proofs/artist/51845645-60f3-496a-a4aa-31a025445d24.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 0xa8c81261c0600a645319e4017f4d0a1dbbcba61be3d50f8d0104a4caa0d52042. 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/CA5KR1517666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182723f91eec5ef1654b9f226f56020c37d0cd0f249d603e21b7997b68591f03. 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/CA5KR1517665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521559d2355b1d22a3789e71a27359b6835aab423818027a89f869cabfeda80c. 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/GBRKQ2047662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeecdda836d8a880d07b7be7dfe865f5368dbe4d021c4b6b3091a0a4ae9fc9e. 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/USLZJ2131029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c86d4166cd9713f5d364e78dce319f44d7022d8b0d6a7f68c53ac1735008b6. 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/USLZJ2131030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ee7920ddb34902ad93ebb310642bb4cd0499e6d1d29313006a23909ce7653a. 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/GBRKQ2047667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b780bec50281fa468a345b43b840a7be0af71fb0809ffae0aa5b5ef2f52d89. 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/GBRKQ2047670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afaf899adffa3e2d8afc0b27247a7a1176e2aa0fe5eb5ea548ce2f5b75db652. 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/GBRKQ2047665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8103fad3222fb34045a91558db25f6b7f2e58b9d0a382683b197e63417f62133. 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/DEEN72000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b162507ecde5e645e9d1a36b09154881b6b305c38fc153eff8fe5d2807b70. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:31Z), 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/GBRKQ2047671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657abde68d91b5cee40bba64ccb7c256834207ce043bb7373a838b44922beddd. 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/GBRKQ2047674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d8574725ea32b9291459994f27f2733435a0b0f56450e9a5a3af5b054f277. 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/QZWV32343711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99587b6c4a6ec37b433c14d30fb10a8869e7d0f5f0f12a28e7c4553d2fc1fac9. 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/QZWDE2301536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ddcbaa2049081089b4161c7f9dea097784f3e63d94b420e15cc972a5e596e. 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/QZWDE2358671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5fa98b8ca27d641704885bae3a10cd5ca177a226f903ffce6195caf88a59ff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWDD2334469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6d577d28d36e5f32a3d792aa3ed0193c93e5f2962aca3069ce64343fec06b1. 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/QZ5FN2354954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcded68c1286400fc8d0e7d72c8d132dd11dcbe8603f186d61ea5caf4f695945. 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/USLZJ2266749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a5c82a1e386514c65b290e162968fde75d4459b4dc9d3742a79af2b971ed09. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5FN2235108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8103fad3222fb34045a91558db25f6b7f2e58b9d0a382683b197e63417f62133. 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/DEEN72000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368811ac719334c4a7cfc1808146b631aec272cdcd48b0a171f581478390c58. 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/CA5KR1540109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ea0a5403c80f30d4cc34135c5d1a4c01e4e11fb2e86f840c1ac51cfbcea19. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA5KR1529828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee463d774b5110f78193aa55065fa10ea5853b02053e1d4001a00553fe77dbea. 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/CA5KR1514664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35195ae64958cfa24f7e37c0b025293ef70cc25b311f5ba26f881478a496c6b. 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/CA5KR1507476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d69e7ea1619428c670f1aedaed50914bb657d1cb2f4600fb6bba02b813123b4. 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/CA5KR1507477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab503dd262ad2da86e53e3295e563bd4e4d0ac78712c0f1549f7cd162749ec. 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/CA5KR1505452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81460e91fa294ec47bf75d8ff3800ee24771e43d35086cd8d7dcfecb0f02ce. 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/CA5KR1058400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc71adcd46f51df049a5a26c12ed36d6001a617c121caab0eb51443a99e446d4. 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/CA5KR1058401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d45d6dd0c4cbb652deb102c28542081d93d229e3496d41d308c576a249e35. 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/CA5KR1049210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450286d51ce817cf593aec4a6dd27f31a70970e1cf8202e580e1fb6ef60fee52. 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/CA6D21000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12ebb2dc2379a632893b8fb894b1c3b547ff4ca972c4b4f165f7f196beb57c5. 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/CA6D21000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a898f4e88d3377b692c812e67064b274bf2eb4537be9f3a62413f63d3d36a. 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/CA6D21000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4902f51ca0801945fcdd4ab8e8439a7981fa9cf22e3e8b1a76c573e1f2ac6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:15Z), 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/USDM31200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2940d210170d550a50bde841d93c38bb17405d71ee3426b147f47cebf6b375. 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/USDM31200145.