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 0xc6e122917f4fc00b5735e449a965e86ff0265eda5c3c5f92ec84024bec318620. 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/75289232-efae-438d-89d9-b5d8aa2a6aa3.json and https://artists.proofprofile.net/proofs/artist/75289232-efae-438d-89d9-b5d8aa2a6aa3.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 0xd20875efc5729af6238db380b23f69497d4dea0b36bf0d25a89fb350f6caa2f7. 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/NLSB72400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f98e2df809dab8f7fadfb4b9f95b527549cf10699442fab6e0697d49eb85e6. 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/US3DF2487028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef341888094609e8bf0397bf94cbf2454e543383967574983cbda27d46c89c75. 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/US3DF2459997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26347cc8a73997cf384ffcce23ecc25d01d80e16d393adf43f7245e06c7e1812. 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/US3DF2453267.
Have You Ever Seen Anything So Beautiful?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6e0b7f3e744ea05e47d0208f417882177544e13ed5e4d0f77d7bf3efe2af1. 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/NLSB72400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f64d83961de39ac90951ad46259a45c15c5847cbcfc61bb10f5ca3483e2c7. 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/NLSB72400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80277b234730d0e529fa67289142909a1d90f38d59ce454d8685558af0f2c1cf. 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/NLSB72400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6c367c5c17b08c7a2d4863efa785d4b8a33098df6c5ca39131a8785539155. 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/NLSB72400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86c64b023608a91c865e304183a13b74f490c726af81a315c9a24365b3d55ce. 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/NLSB72400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc145705dcc269fca167b7472b6b1f16a78e29bd48bd31cd4cbb3e42ccbecb. 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/USANG2462250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c031f1b6bb18fd57cbd1d78cbab88a4076cfe3c0ea05cb49a8b2f4f78928be9. 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/USANG2470509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc0bc87310203b9f37495d66c307702f797c8744b73b1677203a1163aba3559. 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/USANG2441286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877038fc48a49f4af2db0f00ad313e2f2cf523c4b53c621fdd5b83f601c6de9c. 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/USANG2441285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa3b83513ab70a14b2e87ef0697f1ea04265ab542caa16bc26808cb0b0bf5b. 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/USANG2419559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb283ec3f60663bffb047b25e28912f326e93bba5cff3369248afe568567f0. 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/NLSB72500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86b39428e688a3aece41a0d3973b100dd951b3974f158338b0077fbe883e2e. 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/NLSB72500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba3f2bf5d4c90181009ee970583fe3798dfa47bebd23948e6e6b9343864254. 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/NLSB72500208.