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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6788e2deeeb217d9ee8e9d0d2825bea16a917cae66dc52f9c68e2724048b2f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7231fb4f-ba87-4fdd-8d19-d62e81040718.json and https://artists.proofprofile.net/proofs/artist/7231fb4f-ba87-4fdd-8d19-d62e81040718.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3e863006da712077eb8061178e99edf7291eddfc138c398c9a09f85a42d260. 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/QZ5AB1995907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cee09ba4a8838c3ae8068000cc6e599101e326fd47f9787492958f4e5376a30. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5AB2009934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cdf92ef007bb4c4db23abfd66e66b345da9acd9c9e1df10c096df733504b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:44Z), 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/QZ5AB2065962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8684a944cd105da1dbe0970348d70d401f175b9ca75070ed6a1fc5f5d8ee82. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:16Z), 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/US7VG1840235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb331ddd65c049d4394404988cef3b60e8e1bf90fcbcac6ec3cbfadbf6b6c3140. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US7VG1960572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dcac0d54dac784b29453105a6ff651f2fdcee170caa38ee927658419d76e4d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLS1965124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d6e599ece6be19c6aeb927509bb5d14d0e5fe439c0c54dcc15096d0eab36f9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZGLM1914510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cac673a11f367932577e77b37341a17e5cead7a920d20c4b1558fd53c55f26. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:39Z), 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/QZHZ51930535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5cbf0a058d2c27613b3a7894776e532706e99c90c25ca3d571fe74a9541f59. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5AB2182274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a4e00ea1dbac28fdc790d91f7f41b12a254a8764968d638db7c98361ce2abd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:50Z), 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/GBWUL2048379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a05835955222ba103d16ba670d0dcd69d4ed90d85aa7446db5ffefaace7c8fb. 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/QZNJW2195045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fcdcb2a87e81a0c7e73b99d841eb626c05ba8aed2084b3b429d1e49c4d1483. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZ5AB2382338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec659b81e58b8c1a9eb3181366f168b3f0100811a34c8f15f638cfea366c180. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJX2371602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac93c940015139d259807405cd79c68338ff35d2da40c3961ef92d50cb7b42c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJX2371601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee40eadfef6339bcd2ea019e9dfcde07526585413833b5c6a902dbd316b20cd3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZGLS2401111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6ecbdbac79d07b7daaf1c293143c2f44613b7b4bc05780341c02e03b78d24d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJV2444496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285f4d9435d456a5c553060ec26be43a9a8010eab389b2a69a95ded745f1784. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJV2444497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d5840b0ec31bc090782063e12aa3b1f726e1671fbcf80c8a76dc330800d32e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:21:13Z), 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/QZNJV2444498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a795111662280a8c707f2aa059ae4a89724900b213c819d6d729575306d46. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJV2444500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf363f062fb5b6064ae2c07cae13a79a457450c3a7a8db93ee6a98980881b49. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJV2444506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec659b81e58b8c1a9eb3181366f168b3f0100811a34c8f15f638cfea366c180. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNJX2371602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8f295109a177e4e10c3509937a325fd60cab9cf21e1f254d65e6bbf2ed785. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJV2444502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e78ecc0e744940334cdf9273c78e3f86293129904a9ed74ee2b6a3ace2c73b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:45Z), 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/QZNJV2444503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be04a847b5c834f7797f9043570277f1451f5c5179f1af1d4effa91e1222359. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:19:52Z), 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/QZNJV2444504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515ccc31a69b55b8426b7a8ec0fc26f368fce586e8fbb2e18d390fe9e6010641. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJV2444505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fcdcb2a87e81a0c7e73b99d841eb626c05ba8aed2084b3b429d1e49c4d1483. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5AB2382338.