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 0x85cfd69b281c7fa91f57de7acf7bd03bba8e1c95d1adaffb8ecf1690281a35bc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/debd1462-0067-461e-ae54-9e99b282c57d.json and https://artists.proofprofile.net/proofs/artist/debd1462-0067-461e-ae54-9e99b282c57d.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 0x81c7538567b919329799fddf47625b1211ff70975521e203dbc2bdaa33d62579. 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/QZZ7Q2521486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a4513d2b5c31a7b2859d83cb1d40a16996bec5b79a427bcead2ac82b0dd54. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:30:40Z), 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/QZZ7S2549234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524347f4f96be106232a795a34dabbc13332239cf62860ef59db9b3573ce55da. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7V2561045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e76f6748054c1cbbfb3cf679c9ca76789445bfcfbf5703e6ad2742cb7568bb. 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/QT3EX2579546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf888b3aefdde9118e877cf78c18b23642e49fa54eb47903d365fc4a329c8b8ed. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F22525778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe875e30e22f19939b9ea166f3630964b11e6ba185e2665e9a360dbfdc4344b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F42515246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2eef6a6ede6cb8c34c8fb5bb1ba4540d35729ca9c10ace1a4e82cb69c70571. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F72503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf7c774bf1cc34c26489f3fcca24bafe5b3db385b2c08e07b36286e74cbf2df. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT3F92558620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac11dd5c976ffdccb93eb798412ecc0a55574d8f095cf7fee6f4431bc7a8d1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3FB2544497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af3e7a7a27ecc4468a8df96836c9f9244050290f81b9686521cb8a433627056. 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/QT3FB2544498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7167495185b95b7a07804d177b120c9ebc69e275cc47568c8e266fe712677866. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FF2549366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb494a17585a10f967c4d9d1d662986c99208f120228dd362401e447b6e443805. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT6ED2561392.