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 0x3f9b3535f6080ebb5d40a8500c1bed081641d5fe816887b2043c7707769de0c5. 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/0fbd19e1-9919-47db-9bf1-6f6de69d5f22.json and https://artists.proofprofile.net/proofs/artist/0fbd19e1-9919-47db-9bf1-6f6de69d5f22.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 0x8b6dfc117c3164967737e2cf3d7d1313ef7ea9b1b193c840e3d5f6e85ee9dee0. 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/QZGLS2398495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ca31c9038947cf46d250493d5c4062d3d802a22ba3f0fc521261a283cca27c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJZ2311171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23813ef6bff0263daedab563a70b4f8f57aa3555d25e88a9d132002435e68d10. 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/QZTPX2345902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a0a04ed29c432b9e4cac2e888db36d53a851a95e3d94505f4491140ffc1bc. 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/QZHZ42220439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb683490982d4b5f472f1b05b1bdcbb6dc91f38cba0d1e670245db35d245bcd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9K2298361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a8f509378ca8a466b399335996f3d631e7047a8af3ed62436b9e8ecc19df09. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CLEM42100997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f72ac45a5d4f88057d7649a0e8b727f37a35dbe91de2ed1b59f34ade44b27e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9K2394941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcd0e9861d7eb17fe6c3107366b9b05e05f42a542b24b9968e88f12e518a482. 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/QZW9K2369248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddf890fdf44d23b67a2f754a9b18fa96aa3f8d4e712c14e03bc50f8c1cef6b6. 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/QMDA72329117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb683490982d4b5f472f1b05b1bdcbb6dc91f38cba0d1e670245db35d245bcd. 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/QZW9K2298361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a0a04ed29c432b9e4cac2e888db36d53a851a95e3d94505f4491140ffc1bc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ42220439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5d2c209df7021234aed3a5015242469e2efc0ff9edd5b6ff3eeb9fb3d9acb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62175618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1479f86cc90cce9900427aab688af1c8a1cbda2ae8f9577a6388fb97fac1d2b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2163533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f65a47282613c128d00c6e36d6b58d187d04c24265521ec9a2c747693c3b082. 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/QZFZ21987091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518d643fb2ee08b8f0dfcc1d04fd0134e8ce410f95fb44412c6a6aa38e6d2f36. 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/SE6A91893563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196e1f98e4a71dc68be372a7afb98d9a0a30e1dc22824d07fc4001ce3eac5bd. 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/QZ5AB2446941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8e792c82f069f37662b419467a992cc9016e021d05cfe438e5d680cccf07f. 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/US7VG2490569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f72ac45a5d4f88057d7649a0e8b727f37a35dbe91de2ed1b59f34ade44b27e. 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/QZW9K2394941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfaa4026f44339608707ed5f526db6bfbb84743b2de2b999e77184d0d04445b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2446943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcdb5dbd8d1044f4bb0263dfd42b7647e0ddd28feb5dce107a09a45f4c6d520. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLEM42101046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640bf801fcc3993aa65bd0cb23b283c3b0332edbc96a736119440c77344eb400. 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/CLEM42101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c0a5e56eb855e83cc5fa3ea0ef4734b116b4274fb9f92f872e9c754a24ac54. 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/QZNJV2237269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099b452ef57de65119462ff1210ff2e78872bebe83dac92ac3bbc1eff5646ba1. 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/QZNJV2237270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c092b76816ca136d8f62e9f3de5c8692bb59bd88cc19f8aefae272824b3bc3. 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/QZHZ52238591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc147e0bd048470008547576bd7646843aad63109c7588c85ca5dd06f7d9674. 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/QZNJV2237271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05513a73e0eae72ebdbc23388720ded6b3a927bc6ab488e8e935122efb141c55. 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/QZNJV2237272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47372fa6775d754e415f45bf0b86d241a446c942749727fc1db611181f0a1ab4. 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/QZNJV2237273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91920a1ea97ac809c1cd570dc47080ef096f0a7fa354abad7dfbe32960afff. 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/QZRP52279786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3135bc9f968b09a45daf5452816a6232cb3e3460316df2ae9265d71e4f24da1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJZ2345614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19865cf05dc7fb16ff3723a919551d0922ded8f6b614e27157dcf86fecdc13. 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/QZNJV2393829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a66761ebab03b2601aa6b1c7ca10244ddbaa7bf3da44a66ff29deb824d4f6. 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/QZTVM2337420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1529498fdc8808a81607a177291e9e27ddb4161116a886ad9e0c981cf9fff6. 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/QZTVM2337423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a201b9fbc26aefda55534006c43aa9edbd679f60d4a06f330e5a35956acfc08. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTVM2337424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2484094cbc1d0787b31a8d4b7aa9152f5fe19171412834c86c546c54656c647. 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/QZNW72338801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85f5bb183eaf5a7a39a1bc9e16a8a0de0a30eb6e40e82fbc42a20d7812d9ac. 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/QM4TX2241249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574c77992f8dc8ff599aa8afc14566bb5c84bdfe803f797d0f78138956401702. 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/QZK6H2171547.