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 0x4f9241c45800d0f1758e4144dc30457e85debae87397299763dcc3e8d41777fc. 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/1909b3f9-937a-4c99-a7fe-a1d4645e9c5f.json and https://artists.proofprofile.net/proofs/artist/1909b3f9-937a-4c99-a7fe-a1d4645e9c5f.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 0x3faecf0f6edcff41d43bc460dd0d7ac969eeb6fd1e0a799faa111bf0231388d7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US92U1910061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc419d5785975f22a17600e271503778c6782af3913eee7d397b2c1e5af29c3e1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US92U1910062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8cb0d1756dc8d43e64b6d69959ee435e0062c9f969a04089ec856d9e16e633. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US92U1910063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff673c0e6021863d890dabe903ef48e6892a4f45384290d20f64afff4485990. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US92U1910064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3fcc2c967b3abfb663efc79676ceee99c884a2983d923eaf8167d9a030772. 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/DEQ121429627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27faffd1fbe2807da3de067d977259a85426b73ec3a1a9f0907ec2e8c0d3062b. 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/DEQ121429628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba27012e9a0e5932e149915e4a1e99685ea41a3a6f16f554412bbf0fa5450c9. 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/DEQ121429630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25966b060329e7861e2ef1d64cd5a2d354522d93c08ed93f5cbd1c3842e3b782. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f845d8f8399cb34f4d5c99e814d30a4db6499e340e4f0f91bd4823d0044fa63. 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/DEQ121429632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940efe31c6dc3e8e8fd770dfa39499984ed77125e856b34fb8120c24641ef2c1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a90623f75693e33aed804890b7bd6ec991238b930c3d0c08c6768e584ec33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a737d7bde3c476ab6544176dc8053d9f1501c9b1dddb9c741a68c2f9c26b2f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e6cf74b96621f6ada08f2ac6a6aae211bb2f5f447fa3a07551e18e9f4c7487. 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/DEQ121429636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd96bcca0c51209af56e1b7094392ca443fe0b33c9cd6b840e4fa91bbb9d5c54. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca12b09bf4e8c213815062044ff099bd2968d2212512142b21e23b4325fa50f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d1c7d0d5d15f6ef20a186ba0870d3c561313c1ec5c87f2fe0a131b9db2bb7. 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/DEQ121429639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa46be5347356cd8cf1abb684803302df369214d25626d237f91e83e637818c. 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/DEQ121429640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b22897ec5e86121515a065d68cea83569a525cb658abd6d1ee404f6b77dac9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e273ffc17d020fe1b53988000e55f680de55e7096fcd8eb84abda3c723d9728. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35764b64b238b6f266d2f65f2dd5f2d1c72144c55ad903db24aa935aed8e9b54. 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/DEQ121429643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd25637b8dd76ca001a62dc3a7146d65f184637e7eaab5d68dc497b05d7b017f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c6c4a26d24b1c4fd62bcbb493ffceaafc9694ac75e8fa4aae2947aaca6d75c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7636f9fc7ad42eac9e4722bd8d209f3d0da235e71ec7761350cb46d59688a480. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7a1476b4e237ea4b8d695605322e9064a4cdabacc931be09a2e86eefcc7379. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121429647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d3387f18be8ba37c2d0df6c97ff2ef5e94e834bc4034c8f8e15e1a30ae8ca8. 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/TCAFE2091745.
Proceduri de Rutina (5th Anniversary Edition) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3548b48ae00c6362634b1b690cdadd4ea04efa9703186096a8c0f79c25e156f3. 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/DEGC61401383.