CRR may refer to: Capital Requirements Regulation, a European regulation on prudential requirements for credit institutions and investment firms Charleston Road Registry Inc., Google's domain name
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 0x662771c19553a8b8641bfbb02f88901261c4abc4b05d3c2c5031b915f9470098. 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/67fc4982-4c23-499b-826c-3fca4ba849a3.json and https://artists.proofprofile.net/proofs/artist/67fc4982-4c23-499b-826c-3fca4ba849a3.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 0xbe3c0844823a3fc0dab1918f16cfcead77b47f1e74fc5799736a889f64644ad7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82441734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ed48f6d76b9ca5c0754b809fe7508f37f03ac763f83c3bd133c3e276e356dd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN92453304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf9318f448ee2738ceea62fcba1794a004ece89ebc04059ecd33d764f830a0b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN92472914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b0f312807235b0f7846f19f77e91bf6696d07755e777f756088a6d8e8fe11. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2424415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32fb68c94eef48c1a6b84688e17b5cf95f0d014d9c852eed6e243aed54e2102. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6F2456563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80f7e516c323cdc8cefe0b0e029545580f939c630f9ae0053887757b5dee11. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWU2446955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa338ba3accdaf0a36eb7493462f6d728154716b30cd32066794d405180af5ac. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMEP2400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031aa84af03ce0832a65e9ebe4e1e498633def5c61e67dac1c9c40f8d850bbfc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWU2417770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee4c853255cf3ee277da504d486afd762c3d7c65b2b4aeb9cf13e84e4a1b88. 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/QZNWW2464814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892951758422bfc9a5004f4865a4fa4f209ffba408ec7618e4aa1a837f25395. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWW2464817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a6d6a9c526b90816e45f5945443b5e713039bc3db3088dedd93a1594367ac0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZPLS2427066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf20ce972cb202625cfd540f9d0e11338430f31a2ce92e4af2ad1900defaced. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZTAT2459093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb960dab789010b394f3b76c69abd01adc92d8a880da60afd7221d40eae660bd6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB32479664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62972182c0a090444b8e19ce53e8639f1eeca850c6accf15e460f73b72ac00. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB32479669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5193d57dc9a60f65dbf066e9e7ad3a7a35c239c1d0112b38246c7c07a3629a1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZTBA2445850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab486ce26aaf9a392e2673eeb2d88927bfc36bee35930554faeeb1c62b98ea72. 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/QZWFG2432834.