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 0x25c29c7c0700eeb35a0ed5c7db5a351e59e01d3c7eb924d9b07894bb9fcc4206. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e4a8be3-1f66-4ff0-8f84-e7d45f2ca359.json and https://artists.proofprofile.net/proofs/artist/8e4a8be3-1f66-4ff0-8f84-e7d45f2ca359.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 0xe2db3beb49720ec9951edddebcc309f8aa97e39f1c8dd78c2868bf8cda436af0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NO6QK2107031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1080cae2c989eb8af5d968e27cc2ce112b5359b6b3e002e156fdf7f7c74367ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOL3T2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac14ee969b35c93af00e04358e32802b6e4535a1c0128e54e2d62bafd54a9f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOL3T2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcce8e08750b9dc41a65bd5a001af6db4ac57ef492cd033c09101cb4fba82016. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NO6QK2007011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a46115e701b5a3d5db5c440a7ef0342596da54473c8cd9f8b470edd1d20d20. 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/NOL3T2101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f9409d634295f0b753c6c0b36e7c23b0f10313492da858ea6849c9c80fabcd. 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/NOL3T2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df35fa9621371cd9b7ee9354238a0a287ed85199dd830211031262478065ab. 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/NOL3T2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3afb32fb698a5a249c2667f383b9528c50d2d395cda45dab8a20cb09ab2457. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOL3T2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432784a5567b6ff7701ba3573a79f5ef1f915c925ab6d27c3db2433b95ebebf1. 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/NOL3T2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7395a2fa7d1358f66cc751a7b12203ebba1c9c91261e41132cdbf8cb0d97535. 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/NO6QK2007021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e7328da5bcf2d4b74fa1c11b3b06b19855f5d5da1ab462a9aebeef8214ae83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NO6QK2107021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7395a2fa7d1358f66cc751a7b12203ebba1c9c91261e41132cdbf8cb0d97535. 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/NO6QK2007021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ac8127cd260a490557dab07f24d778d9366065381c49775cd985c279fea909. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NO6492105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54714370cd12d0b8434b5347e8b179a3be2b306ab200f7f1f389ee9250f59bf6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NO6492104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b602d0ccbdc4f76cb650c368453b5d385a67de037ead71da5932b307900e38d. 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/NOE1D1903010.
Black Strait Blues (Official Motion Picture Soundtrack)