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 0x0329306dddf128f2c299ec9cac57d4583758dc4adcdefa0e7d99e2a567ae05eb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8311a405-8858-4303-8da5-540da6d5c9fc.json and https://artists.proofprofile.net/proofs/artist/8311a405-8858-4303-8da5-540da6d5c9fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Histoires sans paroles - Harmonium symphonique - Musique du film (LIVE)
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 0xecae7bf0fb7324e3754db2299e01292f34fbf667f40048bda1600917b8697b6d. 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/CAG602465003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1719727703024dce5df55e9ec3c7fd839932791ba7748052d8658c5c25133c1b. 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/CAG602465004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6b8408207a38e838ab3c28ebfcc9ec7ce636ec566a25285aa81dcc1b206b5d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAG602465006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28594914405b3708b92d8ed2e7b1a12cf9fe85d1a63cf69f8a86b0e1cb9992a4. 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/CAG602465010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a0c8a1d505573adf02a2247d82840b135ea3e491bd621ba2c516203f5a390. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAG602465001.
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
Aujourd'hui je dis bonjour a la vie - LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2b661ee61315ce2493e387dd339a16ed4480c49c06a52b0fbc7d53d77e4be. 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/CAG602465002.
Le corridor / Les premières lumières - LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c065653aa8711c2a6709b06892f420a6b13c6b1e1cc539d90ff490212147d12. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAG602465005.
L'appel / Le premier ciel / Sur une corde raide - LIVE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af78ea3b86ba2dcbf57bb2e66451fc6aec53fe19883f457dba76d80cbc6f775. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CAG602465007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7283b9e3ce7904db10824ef8b6014ef034be98af040d652efdf575c199a820. 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/CAG602465009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da47ee3355c731002e849315aae2729dd9fca4409af526d816110bd57721c9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CAG602465012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27ba613c16c4aaa299d4b1adfa00f7d3f39ca716cb3bed015894b24396d9361. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CAG602465016.