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 0xd414d1739f46b05c271517679abce1948ad443613a8c600e39d21ccc1fb37033. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7db8b6f2-48a1-4ee8-8933-7b15645ac369.json and https://artists.proofprofile.net/proofs/artist/7db8b6f2-48a1-4ee8-8933-7b15645ac369.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 0x9c2a84f1484280047cbe0361294d00570b20fda87f2f766bf72211365444f9fb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/IT6DT1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7421034ca7bd13eca60ca88e09a9e26186c0a550208cfb672be6ab58fb89ea8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IT6DT1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b714056659294d26cf1dd95352a0bd604a1b0be41bc8bf06cf7635597edcb51. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IT6DT1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff99561603d23feec2732d282c223cf3ea46f555879fc4e0e086465cb85ab6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IT6DT1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5496170ced579131556800871ab92d3a53fee67fb5a0b3ef491f02dabad376. 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/IT6DT1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e8f01718fa597626ee7bcca9d4f3755c6a3d9a9801b14314b77771aff8de0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IT6DT1400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2142a947ee156411c0e9132973ad69f76484c0da894c6b1a5a5aa018909da650. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IT6DT1500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06047dc1597407dc75fbb7b096829d5ccfa9eade6b494e16cace89327c73ca1e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IT6DT1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09496910d72d2f7e7f759ca7ba47e2618671a69461475103114504f12003451f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IT6DT1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887dbb843de6a0d9b76043fa04546606395842e82db5b2260ffa90777d4a9b08. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IT6DT2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036b27661a13aae0fe03fea442b68b04289b94afda88f2efd04e54fae911e793. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IT6DT2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56ae627c2dc595eecefb9127c80ae35e2bf351c716289b1680a4d78a3ae124. 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/ITT151000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80f12128426b9dd7815f69b0e05c0c164c2d1130bf4746e8448821f8346ff8. 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/ITL751400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5ba2277859f528216166cb7f4888d7ec32f052cc19aa0b2c4acd0d185ba82. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/IT6DT1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839b42ff2a4bd03a25cf8dda3aee609e93f5f5c58aea5bc0371d8ed06d43bdc. 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/ITZA81400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7328a61fd9dd5b83b94ca01ad56aada9650ed171e52d869a57af66a294b841. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITL751600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9725c838c66c65a1a22df0196daa81ee54b1fae15455313fcd63778e3dc49a9e. 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/ITP841001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce3955ac157149ac2a9eafc24f7b4017cde5cd0788a303fe9f7dda340f9057f. 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/FR6V82242298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe156b8754f83f23a40c5cf76917afb58faa2054514631e3bb21e1d785a3be4ba. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEAR41714671.
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