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 0x4b3c48162792c6b74d485074fb8a1ddd6e521b8a6fd3cd759ca311e887671140. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156f744f-cbed-450b-9d1c-5a37b8e22d99.json and https://artists.proofprofile.net/proofs/artist/156f744f-cbed-450b-9d1c-5a37b8e22d99.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 0x2fd093e06c91571c286ad68546c07ea08f0e54791f298e5030598305a3af1d7c. 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/VNA0F2317326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723f7911ce217292b90a207b67ff8cc694255eb47dc8163ed539f9c7cc1d5587. 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/VNA0F2317327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4ff541ad2d5cd10fb81db8b1bb54eafa5cbe0f3361c2d6e7aaf1c1c3c5f0e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0F2317328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c61cfda2eac84562f1b09d94920c8bedd542c937d93508f702cdd18d85d94e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/VNA0F2317329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abad9871b0accb826a63a31926aa95c92c4361ab6944c2d308813b29813bcee. 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/VNA0F2317330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c7a361b3e7f45ac6c86049a6240e19d92945c4930ef4bff72c4efdc2b22df5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNA0F2317333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b6f1f6d3f63fc4615aea502d8cff3bff6ddec60888dce1d2bdaa3b447d7c57. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0F2317334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999a85664742589d678f6fb0f6faa95c8e9b4fc31725e3b75c6f7ca1d1f83b6c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/VNA0F2317325.
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 0x4eb98c6de59fc542f62bef9520c619277c59d96ccdec87ac2c23e2c59a298918. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/VNA0F2317331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf3805b4dbb1dd02fbb0f92bd0fc72d378b5cb9c724c7a7445c509bd1084e34. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/VNA0F2317332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c8f12d285e013b78ba66d82f277dfe3a6d07d14500c200e17e40e45c02159. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0F2318591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc4c1ed91550a12708aab2ab02c3d31fbfd550b4d66dbf8b7ecdf3eaa939b3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/VNA0F2318590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90826ed8f31cdad8109ff5484bd6c7c22803c01715dcfd48f09ed73aee5dd6d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/VNA0F2318592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7fe91f6d94d53cfd1ab7133ff0e6610f12e27631616963e437e7d74db95ef. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/VNA0F2318593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85b537f7272a4ee159b349b9d785c4bf8a58ce20ac782aeea548f328351d63. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/VNA0F2318242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f5401262b5f69fc50091d3d2145fc8cbf7c02cc2fb1927b7c72fc064084247. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/VNA0F2318243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f6d8cfd91a5042d9bc02cb18e163959d71633281c73178bfa55a2b63bade0e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/VNA0F2318244.