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 0x6ceb9dc0aea1490f328c537030e8bb8daf2869b29b058bb1b6a9276273e9a05a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d884b62d-0a82-470f-a44a-1ad1b03d8f70.json and https://artists.proofprofile.net/proofs/artist/d884b62d-0a82-470f-a44a-1ad1b03d8f70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Nil - The Nile (Le chant des fleuves / The Song of the Rivers)
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 0x48780a8760a69ad58634b60cc1e6804586d2c5a730d8d6fbdf51fc9e678fba2b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRV961200002.
Ethiopiques, Vol. 26: Mahmoud Ahmed 1972-1974 (feat. Imperial Body Guard Band)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b9779c2ea2d886fe50f9f5df1b68b08aa0a3259121a2c7f630acbef578388. 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/FRY397213011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1acbbb778b0f7e12be9ece10c290d7cfd21c90b5c0e36008832f70ca1ff1e3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRY397213012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136266b6e06c64fdf91eb528ef44cf24c3a94bad25e247b36f06fb6bc379c19. 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/FRY397313013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e12989879682a5a95a641db89d04877b9e2bc45270a45fbde0e39cec4817967. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRY397313014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74159f34f742e2e769b8f58809fcf804eeb8bb91cb2310756959f16f4bf78eb. 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/FRY397313015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a3cea5ea3ebce2c6ad38b4c07bc143e4b72a42b8c7670efad6fb341f28e2b4. 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/FRY397313016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d612c902e611fdfcf5fe8ab509fc99deef24503c73bf33e380741d848d0b3. 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/FRY397313017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c361102fac176e97cdce25a5ae14161a3d3748988289bc7231a46918060b17. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRY397313018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f0f7dce992416b68a0e36469974d8c55debd7d5e86b021a4675262a9a966b6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRY397313019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3530060e1eb430dfb652f7c47bf77b6f05c06f66fe75a7fb5b378bed202b4bd2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRY397313020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa740bdf72ebce786036c188f4bb6b8e789fddc31451f3b0518b08301bd639691. 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/FRY397413021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca8c43a59a8de57e80975852cf4fc09aeba22d3ec49ced4f7677ecb6240c3e7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRY397413022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a221d39a12e51144215e20716f2ef973265339a45c7e13d26c750b6a710b13. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FRY397413023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e92dd04267cdb7dfc837cc4f953dee4ad2dda48ef6bdaf714c135e739df2ba8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRY397413024.