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 0xb02eb2a03d6860bd98ec2d3cf20add1cd8cbb9d0cfd74201c96451f530f2c04f. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a738541-9c8d-4ae1-a7d6-54ef7071ee15.json and https://artists.proofprofile.net/proofs/artist/7a738541-9c8d-4ae1-a7d6-54ef7071ee15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lalande: Majesté (Collection Château de Versailles)
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 0x86e5e7121ea9acd7499dd195cf801587223e2256f35f31e81916b08d6a2ebab7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR50X1796812.
Deitatis Majestatem: IV. O caro Christi vera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da98e5c6acc6f07a57a49e5dfda3bf2fc6c44daceb9c509e5cfb993c8080c12. 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/FR50X1796804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6064a6452b96b736bc1baf60ddf22e660e2f159718be753ae1fb40c4f14a3e5c. 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/FR50X1796805.
Deitatis Majestatem: VI. O mentis jubilatio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281db4db20481d0449804e4070385712adbc28b54a3698a56cba921b56a0c725. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR50X1796806.
Deitatis Majestatem: VIII. O bonitatis prodigium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90858d5265c9c056f22c1d99cb4cec675e21523c87002e2a954985393bbe7678. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR50X1796808.
Ecce Nunc Benedicite, S.8: I. Ecce nunc benedicite Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108bd333e4c5bbbe949747be7876979222e965139d798a2487469faa8a25fe21. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR50X1796809.
Ecce Nunc Benedicite, S.8: II. In noctibus extollite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f98679fd648b98d0190ff16cf7925baa6e7e713251da495bb8ca288fa5900. 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/FR50X1796810.
Ecce Nunc Benedicite, S.8: III. Benedicat te Dominus ex Sion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb791f59e99a92124f2b7858e0cbcf509200903848a19342d0b8355f55288d. 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/FR50X1796811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8ad46293032d9a1ce4586ed33493545de8c51934c4674af98afc1cf4df4c5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR50X1796814.
Te Deum, S.32: X. Tu ad dexteram Dei sedes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9bd375d65cff463776e7bcf2adc94efc201072a697cfb72f9ec80314179b8a. 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/FR50X1796821.
Te Deum, S.32: XV. Per singulos dies benedicimus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb619ef72dbb87f93dfdbc8436e18872d51186d84df8fece19f2a321d329c5618. 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/FR50X1796826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecec5e6f9630f64ed8347a9d0918f3cff3882f1a0232bf4707d9ae27cf15cb75. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR50X1796827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b8350d5a5b45761ca01a2855786411f3ac418facb4225117ad9822bf7189b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR50X1796828.