Coop or Co-op most often refer to: Chicken coop or other animal enclosure Cooperative or co-operative ("co-op"), an association co-operating for mutual social, economic or cultural benefit Consumer
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 0x6567adbe14159278a4406e89d28203d7ea3b5dcc5508cfe23191eae1a67def96. 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/2c59629a-574a-4878-a0ad-df05016f2010.json and https://artists.proofprofile.net/proofs/artist/2c59629a-574a-4878-a0ad-df05016f2010.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 0x661dfed0125b9bd420b4b89497dc15317a26341ffcebce5453861e1d9a9dbe49. 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/QZES72287054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee4d59b456bb806cd8c13d6f1333af9cc3b15b25d1bb458604956d5bd09a78. 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/QZES62096803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7877ea7b0bf3b01a52b6b1364a8170d7852e8b27a7714ed664356d1e6ec2278f. 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/QZDA52202538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45286590402755836d7c794baf8d21152f00bd7990691bde862e0cde48065b. 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/QZES92146926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9db23b31f7dd26e88bf51db6d4a3cc924866da25db422dba13efe40ccf1b94. 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/QZHN71935358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde537b78859087e28481d351fe48ac4f6ee261f3ea6197bec76924df54b90db9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZSYP2190852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648ce29b8793f32fa376ef9ec68fa82938fc87dcbb02de534a2630948537bb7b. 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/QZTL92194839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f58d73d3ef2e4dbb33d2346aefe0310f09ad59296e82234a10842b75c51cfb. 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/QZFZ21923674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce911705984bc75c74343cc44541e8e1095217557a1cc989576d0ff3fb2845e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:23Z), 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/QZHNA1943598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e695150c30eb8a1b2ae32cffce8a84aff2fa37cbebefe13058c18772ad8da4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFZ21987358.