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 0x088239b85fba41718c7c90d95c54991bef4f0b8b754509f0869b1fd3670aebc9. 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/6d38fd58-741b-4bca-b6b3-34cdc9e26adb.json and https://artists.proofprofile.net/proofs/artist/6d38fd58-741b-4bca-b6b3-34cdc9e26adb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The World Forgetting, by the World Forgot
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 0x7d8906784b3daaf07febf480b6f8f5b59e26eaf92f7ea035a26b138193bc987c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/TCADA1790137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a96d69a4f82550f0a1cd7284e291e15ec86b875b7b0278248d3d1d610c286. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCADA1790140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a508b215b319822db269d80e16dc3603f57c69d46a0104b628432349113759. 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/TCADG1759630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc977677e08cba752cb851e23755ef7c6826fbf67b61d1e54b2b638d7294c3479. 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/TCADF1713072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9a6eac0d469d2c4f0d4e0e4e64105d944139eaa4c5b3620bbd8dafaf03d8cf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADG1759645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287617dd8804f61177be4ceffdab7df726ef6a72cc32f7419b3f7e0d1aa83301. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCADF1779029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a74b3faf44c6e64af35a2f80d6d68378192909ba1cbf2dae312e7e5dade37e1. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/TCADJ1796298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf392ee3b60ec8a201bbb280941a01c148858d9be1aa1477db322487e9584d69b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCADL1810060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8aa8c11ee01b59b9b938cee23fa13ac033a0b518e64a2972065c726a7a111a. 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/TCADP1850944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf617d8fef12b8faf9393c27e0c9ca7636852013705539ef0edaece52f4e3ee6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADP1850939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d63a9bcabde4f3a94d6aece09f37e5fd3450e55ceef679090cf8360cb7ef36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR1715775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fe23745b6b980821718fa7ea9000f8eddd8441497c393f37b2a2f4152e3265. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCADA1790159.
The World Forgetting, by the World Forgot (Slowed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cfd1b575118c6d26902973ff4d97ccc4106e3cf2c9415a615940370ea5af2d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIF2402454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f43291504dd7bb4c3095308cca4642f1af8f9c0257ee197867b4dfda4e86fa8. 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/GBKQU1886851.