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 0x0daea7def67440be544a61e62049d7a3975870d7c549c8e63445a563287a7dc1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb6b7236-0e25-476d-9fd8-672ee6687df3.json and https://artists.proofprofile.net/proofs/artist/bb6b7236-0e25-476d-9fd8-672ee6687df3.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 0x8b55156bac5754b99d92d66482c853fa1a688794998ce79b86a9488527c69c08. 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/GBKPL2006465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d902a5a65211d0166300508a692e873ada93eb0e70e191e47936f68c38537. 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/GBKPL2006464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29487ade02050755d33a8e7a0d9c9a08b512a41f61d36f54fceeae8ecfc7f77. 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/GBEWA2104050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca05b490f5e4c07464a30bdc4d425ed2c722ea180ff9a5aca802dff788c57718. 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/GBEWA2200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e73cee78032e53d6d6172172236413bb3de80d2b3049d501b6ec6ceb9b993. 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/GBEWA2102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b921cb1ebe8712c40edb18e59935633ee2200d29ac5af1f26e45510bfd9523b. 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/FR85U2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c256266453a8803dbdb4a9171adc4ee3b1f4f435080f60ed2f23ba5ac208f. 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/FR85U2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7845db5688f41cbfee84264a4706633b8cf7318cef35cc4b371af33d0965fde0. 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/FR85U2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77548dab275338de1f06a75ebc0561f6cc45abab3f71d9b4248b5e83ebd2a8f8. 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/FR85U2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a593fea1569042fc116a1631d121d88be8192b7c318b2903a8dc2bea6e466. 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/FR85U2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5196a8e6d5da96ddc96e960138036832c7cc4a2bbec354cdd558f00bb0efdf2. 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/DKAZ72257801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c01fc3de3e5690be167db9bd1372b66613efd6b99c870830494d12aabcb67e1. 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/FR85U2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80717080477deba8e90f35a61c144fffe3e57acf44be673a637af90c4312f5f9. 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/FR85U2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414030a386419ef20e6a6fcf431a8ecf767661af321f49e2b4a662f811640b69. 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/FR85U2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23d60f9d181bd262ca70376bdf536b69aa0678ee80718b0407ad37aeedd5153. 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/FR85U2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7394eee7ff1eb1dce29669fdefff40bc954d9ad8f28057956aab03523ee30ce. 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/FR85U2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bacddead1465acf084c5868a9931a2a1e6695193d591c616b1a9590bc49923. 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/FR85U2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4573773193768abd8e77efc8d8306d957ba1eb95284d0acc3d3dbe56ab721c6. 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/FR85U2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0799fee8b3d8046757bdf87be4a05fc4d348d3533ef9ee44aa1eadd0020d1b. 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/FR85U2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c12a340e9bd095d787bed8fc90495b2aba7f7569dcf06a0da4710e1b229db7. 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/FR85U2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c921aa0bb7690f12f04281e020ca20f5203af02f7eb17c007ba96a4309bd8db. 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/FR85U2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63f3249221ae91cda14d9987540749d0758be7d1ad81fe2e176ba6bbabcb50f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR85U2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6dc044f9b9d3636df2a3f857cabb0d080f96756544b98cb463b1da9fcc3fb. 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/FR85U2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002ca496646838de91e94f3b4a195d65af1ae3ac5981f7a72ce8ce0fe815a05f. 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/FRX202108831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367f295e4738028afc117f6f6a3074ce6a27e86061923b8ea1e5dad3d370ceb. 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/DEY472180209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310d6c1f9e7fc128b7c861d0f8daaee8da221f0a126ae96e9a4ed0a0d63098f9. 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/CH3132318437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3459fd712f678da8938050a0c0dfba8f0fa0ed4fd2c8da68987f16cce9558d5. 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/CH3132318429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa862e27eb7d53809a6e4f331d7465d6ed40e68f9d629dab68d4fed84621b7ede. 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/NLRD52027649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607c17ff04f1fef714c35e763dad88e676fef477afd19c57262ff2c982924af3. 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/NLHR22100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798f58fd79893ed511197da572973bb311ea4f8ff147cbbe579391c65c4a4e3f. 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/GBJX32145454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacacc332eb7fa1c4c7c341e92a0fab3828a5d1c00b8bfccf65463524eddad9ad. 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/GBJX32045499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3671df4988f18012b9917def0d34e68332dac63ee8881442e2b0067f596de81. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:23Z), 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/DEY472176377.