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 0x2ed17c8d379113fd0e356533b3da26fe070578981501b232f9f7c343baa9ac33. 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/fe7e0e1c-0dfc-4be0-b2b1-e777ea4b7d74.json and https://artists.proofprofile.net/proofs/artist/fe7e0e1c-0dfc-4be0-b2b1-e777ea4b7d74.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 0x91221519e36095000ecf032f4f7c6c92e1ce26b2ae26b2a0da8c5dd6c2024ae0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:03:19Z), 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/JMA271907881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb41ebc33b2fd24a474954846a3a84de93b507d3f4fcd8c544cca590182474. 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/GBP6T2000337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a249f3e7759b4453f090b97beade9bdd49bb38f07deac9dc7d677eb0d5d84. 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/GBP6T1900287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d336a06f51b42241c5f1da2d294c88393fb69699b4c5a0e9fd868328c3c824. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBP6T1900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2bfb28f026f81bb3f2fcec3bfed364afcdd0ba0436f8ac47c67783ab341beb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBP6T1400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fe784fcde434835e816498a04f03c69041fbf037959da84aa367926dde0858. 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/GBP6T1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb297cd112b78ae72638121bc6c5365154697b704e43e52af4322d820be8c08d8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBP6T1400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a8762eb3bad2baab9dc45b6e42c961d10a5e9a3586cc3df3c64738137dfce3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBP6T2300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e27ca593f5e1ba607d60766fa831f020e35b5cae397242e3ac83486383b843. 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/GBP6T2300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf288f27a1c193ba33ba2c497275b94d2da74c4b30bed970950098c0cd90ee948. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:24:51Z), 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/GBP6T2300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d7bf52f0c9e624f419e8399017c3ca4b20fc57fed9d6fbcea0a0355ec10c0. 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/GBP6T2300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea29ca418820ee9f6955f544b155de883e68ad1b4d5100d86781feea5fba7e3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBP6T2300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be93aa8dfbf02691bb3035de61e2229864703b99388b81e6d8161c6c715c53. 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/GBP6T2300473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe768c4bd6be763a271e55ab06f491eb12efc08a045f4ed4c242ecc117e376c3. 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/GBP6T2300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f052458ee44ae52cf066b9219281a9915146f21e3743c77a2e7413dcd8cefb0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBP6T2300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ec4c05793276c150ed78e9c82a15e50efd850ed4dd47fc6bb0e893648e3d9. 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/GBP6T2300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0fded2b0da638048ed6ce725aa3f1bd2e4fbbdfa2c804a89a9ce202249dde6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBP6T1400142.
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 0xfb49a8ac0d533f8710c76685100d358b080bd4e3e1f73e072727bca49c44236c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBP6T2300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e3479c97157c30b0bdf9de6dd99fcc82fcd8792ed375ee6cf441fcdd92c55a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBP6T2300468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca70dd2329e9ab298c42c355728c3d352de3867553cb2ce980cd58afeb23cb2c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBP6T2300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64607f0951c54cfbd41f46f79983cad68cfa0b9e51e291a62f77407c8cc1f659. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBP6T2300475.