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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847dbaa4d0e9a30fa242c98d26c8e8081157ae2a22aa7059f598617b8c4b2aa1. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa6703c6-e750-4e40-9960-d0b770eab58a.json and https://artists.proofprofile.net/proofs/artist/aa6703c6-e750-4e40-9960-d0b770eab58a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anthèmes II for Violin and Live Electronics: Lent – /I. Libre
Boulez: Sur Incises; Messagesquisse; Anthèmes 2
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df80d4917fa59bed48caec24909c1547121966a8e7911df35689a09951ddd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059904951.
Boulez: Répons; Dialogue de l'ombre double
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb74ed613411e7ea1fbc8d2ed0795bc27520eebe45762f9bd54fa5acfef55c7. 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/DEF059632602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1847271b6d62016e591abb1cf18165a5e5c4b739f8d688489c80a7894d52240a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059632604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd701085582cb40b9f11e3b4029d6e9f96cdf3e5f5aad86cfe97750be0ac7f12e. 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/DEF059632606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d22eb51d0ba4808afe6a10dd3293fb974887b841eaa103c3d6b47133f19f55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF059632608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c27c825b60d0c43e739dd3be8ee1d10079d4cac217bc6df09397edf9a895d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059632609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179998ff9fb4bb4a5274b999e14f960649a2af575cbb2dae28261f8ae8fb6c5c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF059632610.
Anthèmes II for Violin and Live Electronics: I. Très lent, avec beaucoup de flexibilité – I/II. Libre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27de3423856bd7c2cbb68f5195537203a8aca7ddf047b6308782bc64a4f84cdf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF059904952.
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
Anthèmes II for Violin and Live Electronics: II. Rapide, dynamique, très rythmique, rigide – II/III. Libre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682dd1269d4283525cbd48d028d21ead696a1396b86c82ac01dcff455ec16930. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF059904953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f047cbf4e5a65775d6d5735aa8b9d890130288652b221fa8afee49cc04a6b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEF059632603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6152804a6e78c55ef7fabc18d12880b843f88d45c9586f506fdf9b82a7fc95d4. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEF059632605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b28d0708cee4d3b33c1cc4980d468bbe0f29ee6472a7621f4a5a893dbe77d9e. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEF059632607.
Dialogue de l'ombre double: Sigle initial
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302273b0418c0b0b9378db551f8f2ee7e57c2d4de5dd3ec93bdb0730956e532. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEF059632701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c89732b2001962d323561ec2c804077b8243c38e7d770fb2628367d1d65df. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEF059632702.