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 0xfc9a3e7e7acdbda7da40c7ee27f723ee8c74a7ae9393fa710992768fbb2280ec. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3654f73-7de8-4a3b-8266-b3a362eab582.json and https://artists.proofprofile.net/proofs/artist/e3654f73-7de8-4a3b-8266-b3a362eab582.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
7 histoires pour les vacances, Vol. 1 (Histoires)
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 0xb6054434b7c71847553dc203a7273d0cb6a95a82d5087007243073151f51b520. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FXR482400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7890af6703a0ab0741c093bae28d1c3c6afdb9a9da7a58edd1adfb5482d7f102. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FXR482400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f8fc526aedcb86af4d83bc0dec1d5f19e1be0aa0a07a62ed9f01e982c63b23. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FXR482400170.
Le petit collectionneur de couleurs, Pt. 1/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ff953f177c1b21e1c5dff43b2e3101579e120dcfa2be05dd8c6cfc84c382b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FXR482400171.
Le petit collectionneur de couleurs, Pt. 2/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30854d095364ddced22a3dee397b5a04c78bdde99e76833701ea3c83a2e329ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXR482400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b277e4849285efa7e42a0f041bf5d73f43591036c035bdf0a63d7e3952ea7f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FXR482400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7529e18bbb84684f58c9b6f4c2c7a722c6e7042508a41de0352d6836a6ebab. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FXR482400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf254b38e474b97e5663b0911a23338324a96a6cb153f81d331fba0c3ed81be96. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FXR482400175.
5 histoires de la fée Fifolette, Vol. 2 (Histoires)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac9238e29bcd738ebb417513a26728afdb618e82682fa60fc7e16a318f18e5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FXR482500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28785974ae16caed1e32cf5d073e813ba8ab3cf72d6f6f73b942bad6ef0e676. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FXR482500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca70cce8d2c1adfd8d3ea86a8a031724a57c10d364eb72fcca03e7c2abee983. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FXR482500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bd517d1f75347a0e3d04d5da5b308d19da7652f3ca33b00d788db58f19f2b8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FXR482500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61f45e02b9a5513148f47232cedd4d3d75df44890f12cee18b6dfb39b2ea83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FXR482500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556afc4d529a3f517fcc267053537ef6a6588765c1f247b2bbb798cc944a6a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FXR482500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8d5760e3315a86621a85d67008221dddf916ce85661b738af37e078e43540a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FXR482500076.