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 0x82d1203b70f6cf18e5ebeb4acecef830ddf5c5489cfad094dd173c65c097f221. 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/d8b18577-30a1-4fcc-8f31-744eff140efb.json and https://artists.proofprofile.net/proofs/artist/d8b18577-30a1-4fcc-8f31-744eff140efb.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 0x893e5d720928b86d9c9c316ff833cca0e710b8e54de8223c8d4d93770896ff0f. 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/CA5KR2102083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d2bf81f04f4e43fdd144ed1847f3f2cd71facfbb415f8ca0c5f8c57264b533. 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/CA5KR2151611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8056a0d4e6bc8eaefc4c1b3cba106e9ba275647864601cddebd6b819d5cf0e. 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/CA5KR2151612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af93014b0e3bf5048b14cefa46e53d76571b9fdcee9e8d2ba2a20af12bacb8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA5KR2151613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab179d218e65f036602e836960fe08dc95a5f0efdebdc168e7d7ed3f9614ed. 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/CA5KR2151614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b475ba05a1d12568c0595afe7f43b6565ca33f80076d9905da9e45a7dba7dd9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA5KR2151615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456e3430882658201bdfac3e1e348ee668387074c064942fdc49a007953ca44a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CA5KR2151616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61495b7b9347cca970b4ac01c166a03f1fdf62dbd0248f9c57443f53925efd3a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2151617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198af32c9a98d86264dc090fa0ee8e9db57683f7e7d6f9a6c7637f65b1c60ec. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2151618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9162ebc5a4e97297e10d7e19e562d10dad3e4b832438fe13e3993e26b320c4. 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/CA5KR2151619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00cbe9d9b471666e8c600dfc69ce67fd90b3872b1f6191fbf4ff91107a65c54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2151620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b97beed5f8fbe540a04d1e7323a8571d2e8054b2fd4000de4031cd4117a9f1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/CA5KR2151621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca71fcb2482396b605be04da229a6f886ae73357627fb370466a7b4bcfa6a870. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CA5KR2151622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5009f29752d85ea044f3c14a78883a4a22e2ec538e5fbe3399f6a04904a9740. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR2151623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe523f08fe3055deca38a50b6ab546bf9da4d29d0a677de17650ae2e5c458946. 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/CA5KR2151624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743818b5a9d488a8a485e4c90bfae96d1ce9f2fee040c8ad3f013c04f2d49e36. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CA5KR2043061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfa2b2ee260e4006a1e29341b7402e819b82d7679a14ee8af65e8570945856c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA5KR2043062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5747a41993f625622228f7801ff04b9b373860a6d6b687d0bb713610866010. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2043063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7716d7f88b6a9b0e2d29bf695b9fd85c7a1fb6454878027c884be6edfd2405. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2043064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba601ff11969bcef7571487cf2fe64227eb5f3c22b15642a147726b73a31998. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2023228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04097eee3d7393b5c6125d5d981ff574bf79025a5484eeed5ae264d598065742. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2043065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9b292a2f462175091f7aa37890a9715925fddad9af8b2455bff92503d641ce. 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/CA5KR2043066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef4358d199002559bdcec2841a1f4e2f11f596b48322dc489b876727b4d4e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2043067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e062c96c6bffece87bba3c68604a2aa0be18f5618c3c4787cc87ce12928778b. 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/CA5KR2043068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf571e9bcd36d83e25e0e1f795955200b71bae180e15156f9b7542a1185594ffa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR2043070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae122a34010f62d151237beed878aec5dbcc7c841dbcb0165760c3bb840ed7df. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA5KR2038706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf87b426dd8ef527da8d32f12f57cba9ee5fcb318bcd08e12c376176fd607e98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2043071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ed1800d91d18d3ca0f3c018aff1c551cf2368ba91653a676644b09c4445ea. 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/CA5KR2043072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd1f17a12f9dd6a24a9d7df8e5fc421d5f0fd7bec35fd80b30ec250b8c7200c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CA5KR2043073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c294ba4f81663aa9a1718b68bb588cbb17e0c65b6426156d54be791adc1ff20. 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/CA5KR2143605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dab7890a7acbcb28d8620ee41726b93a8619fd0a165d109467975c563838799. 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/CA5KR1979560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cb1baa474f2d07c87688987e0710f69f368492732384524bfe1d4411591839. 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/CA5KR1979570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71897961de9376c09821676dbe4d4bd30f9f14bc939ec9a7e82668d356d901c. 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/CA5KR2102082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d10d68333e581ec1922a76e6507937b6354f03f467da3e75038cd59a34477. 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/CA5KR2151606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999a8909871a26f86d5890103923d2788fbc655e1ac2eb11c30431da2d8b5cf4. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/CA5KR2151654.