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 0xe40969f957f07171270713a63b5444ab55be9725c5a99c7a35390f0bf203e344. 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/054080eb-67a5-4ccb-a2a3-cc606b6c97d6.json and https://artists.proofprofile.net/proofs/artist/054080eb-67a5-4ccb-a2a3-cc606b6c97d6.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 0xf8a3da1d6b31598b6f7a4660c93169f64e809562707bff2d4e4530a890419ac6. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZGWX2238018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77f0185636eab8eb1c8bca3377e5f3eedb417cb99b8912f7bbd34c09fe4422a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZGWX2238019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d5e7534c66a060ff2b3a3223dd23b5e81ecae24c4246f7d0851fb84787d933. 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/QZGWX2238020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8d2158ede818224d626f825bdb285291577e52aa47cabceb858ee7e84105f8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZGWX2238022.
That Emptiness That Will Never Be Filled Again .​.​.
That Emptiness That Will Never Be Filled Again.. (Part. II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e9a2955be8f0be7e8373005ea3afb1e6da1b807a8f1551e71d84a49acf9be. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZPJ32169918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26e54f582b1757b834acbeb1f41042b28c554d0c0e520c5ae47cd7d5484a9e0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPJ32169921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff054f2f61f719de9ad5232b2d9b932e9b8fbf50981bde314cf7a0a0f57d730. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZPJ32226795.
That Loneliness That Will Never Leave Me...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca88fe5a319a41d283452944c70529d30ce3aebae7d49edb00f509c029c0c4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZPJ32328498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a7580622b9dd6288addad6bf6f54ad99bfaf8f95299c6a90734f122a8ff11. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZPJ32328500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986266d9fc512599414f51efab619443493e77f4e5ba34b953b4a9e11b067b3e. 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/QZPJ32447533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432450f1dbd9291c97d40f7dba113fc3e742a8c6baf5baf9f9afe519f284a15. 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/QZPJ32447534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c2f4944e61fbc951e40fad4145ddf92128ff9bf592edf27286fe107666d80. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZPJ32447535.
That Last Hope That Disappears Into The Void
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a89d6f8f9e365f70f6ba178f0671b3a6a7511e0640f559ce1c9e3c62e1b7850. 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/QZPJ32447537.