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 0x43a6ded9c67f6900d3ef21639598403fdfa58dba19334eeb0e308850b33ecf01. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fda5e4f-29ee-4330-a8f7-82b29dcb6792.json and https://artists.proofprofile.net/proofs/artist/5fda5e4f-29ee-4330-a8f7-82b29dcb6792.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e7cb4dc46959c2b292d2592b9c081f5cccab6a308cd1f69b70d0c8ee9f0dd. 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/FRY461401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e746a4bca631c45d137bf4ec4e6b6e7bd4cad9e6fdbd08695fa2307da7f7f8. 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/FRY461401050.
6 Chansons: No. 1. Ca sent le musc… (It smells like musk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc71297eb5828c3e66397d507bce8dc2b13931e3328d438233a4718f00f5a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRY461401070.
6 Chansons: No. 2. J'avais un amour autrefois… (I had a love in the past)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c461f9f51e11785e755ef83c2fb708b7fb564ce24d796d97d7ae4f3cda9607a. 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/FRY461401080.
6 Chansons: No. 4. Trois moines cretois… (Three Cretan monks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad99b16a6c58529e245814712136a1f7e7793e6120fd5006e3c1031e41c85849. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRY461401100.
6 Chansons: No. 5. Aujourd'hui le ciel est noir… (Today the sky is black)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1420091bb975b51f936dfcf6b992f0f1b2d6226a18cbf0fbb372005dec4cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRY461401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a1bee4b76329ba0d24ff6448a610a841bae0294871a6a5f829f5a73c336f57. 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/FRY461401120.
Zyia (version for soprano, flute and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092c9672b4cbad23ff074be59fde55af3d147b54f1e56202b91d86813ce9f65. 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/FRY461401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38464daba4b5e10ad3c67e46fcae26859c97b62d622edd14b21109c60e02f02. 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/FRY461401030.
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 0xa5e08fdc4c19f7bf8d42b9ab1beddacca31e47a3ac5242c2da9e37a4d9f14129. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRY461401060.
6 Chansons: No. 3. Une perdrix descendait de la montagne… (A partridge was coming down from the mountain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7150f2f338ddff6c645364a694073f58c8121b4175a77257db5617ddbdccf. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FRY461401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36d8e7abec62f1cbf6cec0726122f956c235c45b37186658c4558e97865d0b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRY461401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0e4c83e9860ebb939289cd41991d0a8685abbf940e2fc65b19dc09408f5164. 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/FRY461401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60beaf76322b3d220455edfeee546d47051c53b0d17c5921637aec2c9909c57f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRY461401160.