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 0xb20dcf137ac786af19feedba3e18032b94e0f00326655198e7a6f0015abaa805. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c821f259-a8a2-4c96-ac08-e4bfc378d404.json and https://artists.proofprofile.net/proofs/artist/c821f259-a8a2-4c96-ac08-e4bfc378d404.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 0xdfe53ad3e868f09a5abb8c4d752481208b2f312d14ede8dbed68627381616e4b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPJ591701367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d172d41b33f71446f8afc38586a8d963a47678adda990c5976f646099534ad3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPJ591701368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e1b26685a06cc9104a82a3bb288d575bcc2eac0926b5603f1818df201289e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPJ591701369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35a98dd3e3e8234055ddcc6ac81a90d7b8a795945797074c46d070c112abf9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPP531900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed816b1b41f84a6ad9b827f9685e250483d8700f4520e18ad4ebdc3050bc0138. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/JPG101900671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bbd80e683dfa0c4cb3c5684ce67cf3703c29d7a476ef25e3704a7e1dca57f0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPG101900672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2574c3d585e6e0f982489df6e9df599e662a412cb8db9278d50f3a40331bd58b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPG102200928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba823eaf613f69cd581eacd1f500bce6c999e1b8c2f1980a4c5e56e7b0a577a. 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/JPG102200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712caed3384435728e9eb4ec3e0fa4a0f50eeb1ad10d03a4103264fefa4d7018. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPG102200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c715ad50e07b47702914c65bf71a00eae5fa3e4912763e102e357713a546c84. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPG102200931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc4d05e3f70994e066f2bc74efd3fa33b224d7d56d1c3f92195950d45062bb2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPG102200932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748431b3ed9e375b7c2412f87f688c3e715ec3be5760c1694998736880df6a0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPG102200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60db71a3bdd8867a4a665d995da0fb605345518bb3ac6fce3a3c701585a3a6ee. 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/JPG102200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641deab73288aa4f0cce41f6e2086bf4f24ce21833a2fa8a5bb20d0ce127444. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPG102200935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c163cec12c17e43a9434eb4e10373da4edbced9002061d5321902854c1ef3d6. 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/JPG102200936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0233fca6f2bb03ab8789890af4a2ff2855561d458c1e9a06ff3510c5480fa6. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/JPG102200937.
The end of the travel,The beginning of the world
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23fc9e88218d5d4b8811b3bfc5c86aa96de88e1bfcadeaad59b0b9bf5316de. 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/JPG102200938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39938560c8cc19588e7264fae1262e83b1a0501d0c6c38fe1e4c1980cdfbc68f. 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/JPZ922405689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d813c1899bbf1ab326bd70414ee3eecd3afe50c08efe0551b475c787b414b03. 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/JPZ922407834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58c139968f230900c2a416c37262df7b00027aeed5c9bfcaf759f69b179052f. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/JPZ922409139.