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 0xdabecfac9761502a4ac28b8a37791cf7e9eb0f65841a0c4f8985513735ec4864. 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/43c9531d-749c-44f1-b651-543045b5aa76.json and https://artists.proofprofile.net/proofs/artist/43c9531d-749c-44f1-b651-543045b5aa76.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 0x847d4d8987e1cc7f40de00a5b8720da031cb9055efe03258249a895445319bde. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZTB42335982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ade8b778e2b1a47d3463133866cb940f365d24400b003e86da1fec6727d97a. 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/QZES62426478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ab92454caba21cc4b029b981982714b7e155ef29623b9ec62ec607a8fe074. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFK2447990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cdeb198a72da43ff3a5b86a636a998f680ca1ad5e70935836645e8d0ced6a0. 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/QZWFK2447991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6abbd511678b8ebcc8790a3500487bfc8867a80ece55c9fc5c06a34e9fc385. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFK2447992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4e63391ee9618aaf93bcf0b92d579f4c820ee185044dad032451199a56ea81. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:27Z), 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/QZWFK2447994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4203ba0a1c9608bde1388b0da2550149d0d959fd4894db0f1a8bd6f35706cf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZWFK2447995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9d0a092a5d604d06390d03a63ee943a3919044997226e646c7b02a4fe981df. 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/QZWFK2447996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7979b9a9eb706ac5321c32164c29b9669cff6495a144d68dacc16c2c3f6567. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFK2447997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080ef5b2fcfa71331efc22e31790784695bcfb3d222ac331c6c41f2b28586bbc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFK2447998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f1269d91b000ad5db1531cb96c2ec2ad875d6cc9f365d939dbabdb6e067469. 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/QZWFK2448000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bcdd808dc6d566f4cb25286227b127d3ccb2e8b84c6714fe204097e300eaea. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFK2448001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8cbc33e4bc0af5e3f05f8ecae66efda1b65a09918a0b3e98d75ff927b1c2a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:43Z), 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/QZZ7L2459685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813ce31537d0a265dff0ee7fd280528c92429b928f6821877093304fef81089d. 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/QZZ7S2412973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e004af9077d6a08dd600b2d0e38dcf1677a4b37d8a7f2405f551eb2be79894. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3EZ2489594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a629838043de5a0ba62fed4432a53081e3e3edc48c070fe2ad2270f4a925f. 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/QZFZ32503039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d01f0ab8685c2030fd95200ba27df79f95e55745c370f729b389753e49282a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNA2570786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf086adf9c42dea483606c8c1cc9dc5b50de603a64dc3d6d471bdee8b972e5a6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6J2502978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a5c35a09fbb049019d800abfd0e847e71d036f11985dc70564f3d071fd31e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFU2508969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b265ed452c91cc51025903b594bcc192530de6f285afec87e02a266acca30. 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/QZZ7N2570671.