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 0x2cf30581820415ca032fbeeed92a77c8d78c0b41e971622ba0bc6cbf3325238c. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7285787-8cf3-4414-b887-8a59ec78d6be.json and https://artists.proofprofile.net/proofs/artist/a7285787-8cf3-4414-b887-8a59ec78d6be.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 0xacab1931ac915ffe5c1d48cde7cd645b68a0110b8f3e2be216290d271a04d3a2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z2213249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec734440015be10429cad2cb98ed0a70942faa183211ec5a1c6ef417cb6fab74. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBKQU2190961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b809e76bc408988ca3ea75dd52955052e595b84602d181adf333a19828a05f. 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/US83Z2232858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb048ead238297327ad27e1e53c24fad84dba27120d80ca3b8c1248a5f4b76d4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKQU2185103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3216beb1d791c03f89fc4fcc37002dc4f9bb18a4b7e757a371e2b3bed9bcb47. 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/US83Z2025284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02805f12bad0f9f6682a2ff5054047f4c28631e1c3d87bce20551401726c7f. 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/US83Z2025283.
Some Things Are Fluorescent - Time Before Eyes Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05176c2b82c20bcfe2ede4a1651ef0fc325225079f003089691a828ec11dca8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKQU1943086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe454bf44e88cc46e5b91c37399de946bf91de9312ac5c2afbca56fd529dfe921. 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/US83Z2035229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad2cdc5c048254e7aa160d658fd7a4de64aefc5488ebb027df0595f7b057886. 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/US83Z2139524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4921edf69b034199de4ae834d9b3e6ba6dd0e2cdc8f003210841a1a7c678d8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US83Z2139528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f859c52640e9a6440da30db81c163e6883d5ac5b09daf8dffde95cc0fcdb40c. 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/US83Z2139526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3849044a771d8a763384ee9e6a3f440aa06d699a3ef5a468cb6763009ba79b. 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/US83Z2147497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9111936969d44ee48f0c3246b1b4a941241f94e8a7aff1e0f6d19e14b50846bb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2147498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66635f8b70abb5f14294c32c62e571e385eafe4795a9e1e696d61ece80ad333c. 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/US83Z2147496.