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 0xd3a27cfbc27ab15647a19d12c8e84bdc642c9c70334436ca3d224f68badfda77. 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/15935607-af6f-43e2-bfc2-061122aa7059.json and https://artists.proofprofile.net/proofs/artist/15935607-af6f-43e2-bfc2-061122aa7059.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oh, Sister [Feat. Courtney Marie Andrews]
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 0xceba52ca84219489a745da6e8fa690e855f00651bd7f4adf25b46da3b23c5a6f. 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/USRO21901916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98a09305e436260dcea79ce60a78db620b36cc3ec71acdc7132f59871744bf1. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USRO21901701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407ebcdf5882516e10a640c71cb3c1026cd7d7294177aea4f97f028ccda87e4. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USRO21901702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b85919153f904f2b1d947de1aceeca39270c4bc2503c51abc6b5874fc1bc0b9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USRO21901917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41887d7730521875d45dc541b217e4f58789577a2cd3495b73e2c298e59401d6. 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/USRO21901918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18402083557bbcf1628f597eff88a0fc7a70e5c053f7a0cc5f2ffb277d2e4c0d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USRO22303641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7f0f10f32d3a6d850abe6ed300643fa1c536dc335d2903d9588ca03d63eec1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USRO22303594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61524229599f96b62cc53766fd812902fbeab15e9cd886e5c284ed4a0973aac5. 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/USRO22303597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791733dfac54cbb718d543d09a99f266068ea7f993193ba037520c8b26f44ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USRO22303596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668e580662bf64d9f62351a66b2574f27697cd03b658ddd32aa30c8ddd0c8cdf. 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/USRO22303600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ded6c0a0a1f830d0906bd69728f096539cce1a83da72dce95cfb0cb107943. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USRO22303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75b6bacac671b7658952c36b105bbd0b7f480ddd24c1c668beecf8a44384ab5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USRO22303602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3fc4b98e134fe51ed8ebbd04b97e9b462c52a44864fa8a7277e218a2a76653. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USRO22303603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e859a4086e0c6092be90ffa75b239062ce2f7470b08575ce46564bbb350aa79. 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/USFVZ2391222.