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 0xc1eab87def9ab8c6700a53c1f04a97455b3ae0f9fa61db42bb7c1ee2e5ea4b34. 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/92bf6994-6dde-4911-b2c6-4e2b6464b6b4.json and https://artists.proofprofile.net/proofs/artist/92bf6994-6dde-4911-b2c6-4e2b6464b6b4.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 0xf11417af27649c14f45237106653ed2f814090142f4ac93208ee0a260c391541. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HRA040644436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa370e9c9251766c40c09e3606383e266d29048fd034f9d679ae3e9a8f5223815. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/HRA040635384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5268bc9c0a0410c24c5cec3bbd7501391cfaca66098e5e2c96eb06a84e077f8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HRA040645851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61251011f6e4f3c15b70d6fccf5ba36ea86c833dfb889bee8e8cc353201249. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HRA040640956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf03152360002507e4a319e63abcb290d20527e14090279b519e6a58222c07a6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:24Z), 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/HRA040640520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade19ffc5c4070a57bbe8f7b0a3554336f5c30e18918dd1159fbb2d735f5a108. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HRA040637143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06c3a993299e27758813c313e3a7fafb8921a4bc298f13749ba79bcc14aacd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/HRA040643031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de8ed070fcbbf24114cd2fb6b584aa6ad57d1623dc4a5d1c511bd88111351e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:05Z), 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/HRA040632498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f710760746795ddf70861215d63bb154067e26c1c3aff771469fae3860bcd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HRA040643026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e18a07faea5ebf833ff1491fa49d36040106c711365ddc193e9a336e0127f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HRA049531653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bb578388111722521c21bdeafeee5640b3bd500034c941cc2ec47ca40f06a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HRA041163789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8101b37851bff0cb72b75c068f932856f1b28442b1020087300e13f357074379. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:53Z), 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/HRA041582818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d269dbf71706ed3de47e7d3115ee7b660a987359ef1ca27ecae674323228078. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HRA040636500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb095dc79a159ae8ef1841308ce8d77753136c1d963743831eb80639d9ddbd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/HRA042401496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569444ebb80d93379f41f30ede5139890759bc46dd69f86dd815f09ad8c375cc. 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/HRA041684769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537f04051f4601eceb801ec0750620d4480abefd37cbd2166673f02933bc0c12. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/HRA231500081.
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 0xa3eefb6e31847bebf099ea2d138e041e6b777f3fb15060f9bb6900b983d7c01b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HRA041582135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c55a028eef0783539175a260fbaf8a1c77c27795f9ce73f1d3226b3d6fe35cb. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HRA041888622.