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 0x2bd4cc85ba75b7a961bfe2e71b84742b38e4b309013c05eecc019ba95cdf1063. 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/e2d6f4ef-70de-4f73-9ad6-942158e15916.json and https://artists.proofprofile.net/proofs/artist/e2d6f4ef-70de-4f73-9ad6-942158e15916.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 0x263e1e903154996451c23846181033d54cce68650eabf422bfffed85921f67d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:05:09Z), 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/QZES52207769.
Soundless Pattern of the Tortoise's Walk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4ac6bcfc6a0683649ca03e403194900f9be6441fd910a054d9530c5e479a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBKQU1860228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a5cac95885680863adb36a3aeb1a491a052232126bd46576db7bcf96866cd0. 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/BEC292043053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28304cde93295a6cdf6dce49ace4ca73312285a7cc29e239d3f50ef31318f230. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BEC292043054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b332196fc3cde13bd79c1f34bc67a547b323873b965dd9b198395d815504d00. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBKQU2531879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235792f01f16919756125a83e43023b96059d1836c25ae1d0d7da6766556a9d8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2531880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd0e4a26cd54e87f6b021385c5d6554df114c1ad047faafb1c52d2f3fc28db. 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/QM6P42569776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e303687e98a05280b14aabe2e09d305b2bab99b998159777e891f65c18d75a7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6P42569775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd0e4a26cd54e87f6b021385c5d6554df114c1ad047faafb1c52d2f3fc28db. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6P42569776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ae657f8bb936491f6ec1ae011052a1e77e3cd520244d065c83936aaec3c2b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P42569777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d09f580eece359a6ee7321aa2f6c373722e64832148ed4d031c72ff75ce4d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42569778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6fa9885cc5e4f9198cfc00c0e5640788a852b27196b4c7f9d2c53199050c53. 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/AUXN22389973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6167a1a9a214170e2994454d1beec3a35ca3e29caa2623d9ffd35c71527ed9a8. 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/NLBA31000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b1c98bc89075ed6100d89f1c0bb9ce2ebc012941dfe7fe7fb6ff06e508ed4. 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/GBARL1700512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c89bd68adf79d5f30ab36f5c53103bfd7008270c13ee423c613950ea072211. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBVHV1500158.
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 0xe25503a09fc3e3ff90efe821c6bb47414b7eff0baf033a6748be9c86ff3a8486. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLM791400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55cd32994b5028cf4ca2fabb14e8f99cc75ad6e61ef6a1bf52ee3438d9e6dbc. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/BEC292447040.