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 0x7b4f554cb0725d1b37474c5b83813972e957ea305d19d1f9514aec41622516c2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4965a89-8bc2-467f-bd74-72d0a261e5ff.json and https://artists.proofprofile.net/proofs/artist/a4965a89-8bc2-467f-bd74-72d0a261e5ff.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 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 0xe4da8ca46505fd8d6215abf0edc7ace2f9676550b55c0af05559de928c4a35d8. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/NL4NL2151545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036cff3d7c23a9dc6295398fb66ec90ca9c490945fee4141dbdc3b10f8841656. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/NL4NL2151547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2535efa5568259dd08f846ae74a458432e3c7edd13b1563b619ab5dd1acb51d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NL4NL2151548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b9e72016cb2f42262ede323b225554fc85774e15479edf7ee69b9d9095ff4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NL4NL2151549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b9b41de49fb9557e741a8ec382a0b0f45a10e48127e232424a5a0c49fd55be. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/NL4NL2151551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf613f2b822cb03c120c97228ab94bce3c32372fa7051d53fd82e1a9da8fcda50. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL4NL2151554.
Quand les monstres s'endorment [ARCHIVE]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cf84339e75c16de952cc70f86d88cf8b2e2138bf124948dd2d56d2e13fc630. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/NL4NL2220637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77d5acd8423859ec48e115af1f3c8481aaf41729c64d0625cbbecae533c40af. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL4NL2220639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8892efca5e65bebe9f66d6a4b0ea2ef036e3e2214c00d034f71dfb0142d4e475. 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/NL4NL2220640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1a1d48178264036f1a9bc4fb41fe253ef474338e36ab4af3a90e82ff02a6e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NL4NL2220643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5dbead8deff30ab454cf3bf06fe603644910c09a9143e9c8465974e3f4cc6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL4NL2220644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa316ee04625d6c5f462341792a5f08ce3d8c4332ecca1dbcaaad9d7c34ff6830. 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/NL4NL2220646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d94f062400d44b5a12e649c4a57ccf8c5050cab066cdcdbace0e91a7bd26c50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL4NL2220647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe387aa471afb750f78144248859ba427e3461b97caf3868a6df312cce307b2b. 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/NL4NL2220648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad797a7d1880090b0dcd3bdeaab667217b7e176263ac2fe443e95f25965bc473. 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/FXR592300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e32fe51574eecee8ddb376f164819f46ad3d1b7899f2921d91fb98593e3b58. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FXR592300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa12810767a8c0aa1c7e801939eadfd1ea1021ba72d2b324c690ef13ed962b4. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/FXR592300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f41415b08da5a9e2543659c03919d1af30c3b0b68bfe25c66de804e717f474. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FXR592300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d93f2594ed792bbeaf643cd94d1e74422350614f487ed820759a685e0f14bdb. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/FXR592300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e618c39918f0a023bb5475011da09a507419fff960573cd437e4a9e38e614d9. 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/FXR592300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a95eadebedf03620f039f2e2ff1824152c96ee791401a6877e14ace72cd7f70. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FXR592300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e718ed9b344842b59a4d9f19e512a466ce614d6980e59e2b077336a34e86f9f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAHY2493481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8236dc3249682b9718a8143ad4730894a49bb9be8023f8ef74429299704cfecf. 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/TCAIJ2443181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f579417e8ac4647b1c4d89d0906e19c73da7cdbb87dd7f4ee1807db7890c90. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJO2509531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac6f991ef4148c308c08d73bb2e07e7e146f41ccd55f09d49ea8839803987a. 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/DGA082212657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cadaa501c8182753452a579e9f646bd882fa3aea106219d0dbd6c5771dcbe0f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZWFE2353758.