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 0xac8997d0c517566d5ecafef37275575b624e5e2e054fd720b4bcea09a6bda314. 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/6c884dd0-d6d6-4a30-bc26-9bd01d486d9f.json and https://artists.proofprofile.net/proofs/artist/6c884dd0-d6d6-4a30-bc26-9bd01d486d9f.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 0x58995bb772689276593c78677b7899b02740a65999892cb773f1bed1ddfaab5b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62419194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf289c147cb875d5dec9c2982b5d46a47730053be41e86ba627ed2ca90207d26c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEZC62418844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66d2d1f44df659a5716e82df7fe49ad8744e2f1ace508e4ba63da9177a20fb1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZC62417511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8be52f745b9703ebd4c98bdee117f87d80bad9540d39517fa761af8d029433. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZC62407360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8135ea5d677a7f46b3c53e986f7701c8160904d17d7949825b400058e7d29aea. 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/DEZC62404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118130cf3ad2efb81d0f3e57a941094d6bbd680c44b4d18d39c8e6aac2c8f7ae. 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/DEZC62402656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447d1e04fbfb0991693ec4543bb07d8726826048349532f50f946fed7aac8af. 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/DEZC62400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5ec7a7a588c39552717b8f15b913945a35e574da23600d091e09329013f17. 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/DEZC62386260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e84c28923cbf9cbc7e574f74b4982bb032be0b8a17cd673c472c90253238bd. 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/DEZC62493039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ba0321f3825166690c23332c5318710c85c302865e73105652f72ccfd50da. 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/DEZC62492384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59675f7b5390bdfc74a76cefa1da95860bdbcfbd0eb028ca254dddc2dcb88e. 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/DEZC62374625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabc3e6e0855e41b5fea735dfd7da82043ed2527ad97d512497edc4810edd5c. 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/DEZC62378241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd54d840f4e1c039844fb5f3ce5e733430278bee6c43788d704d8e0df9b828c. 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/DEZC62379001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b7e3bf2a067fc1a3ccd9a8f5c9f01bb5f4903f3bcdc77ee91ec990ea4c8771. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEZC62374431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c6eccbfdbb40f5f2a2f568c41a18fe26e02d1e0582e28b22d021c9b394a8a. 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/DEZC62350000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c2bb7f82d3267ae29bbc28c544dc953169d849d56deab90cbce93df248186. 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/DEZC62363738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f45e8de798dee7554de320c84c5ab0fe645b49c56f2ddde8f57f3956bf3a3. 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/DEZC62357042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a314e7ea4612acbdc01929aa3d374387bb090a76d88683f96087b1d7c805ae9. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEZC62341802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380ed923ab5a654e3acdf6ca67595c8f03618974c4c647ede3db565f0f41f0ae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEZC62340405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a4b7e5746b4085f5395e0c32bbdc3c5e5b189ba7492783ea81c5e894c6ff4f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEZC62331932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06bec9dc2e485cfd4e54393b368a7421950fb64856996fd4b54665fe406a063. 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/DEZC62329482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a58d53cd9af9eedaf55f3c18c72c812fa6feb10bc54e6d343ffca993f4664b. 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/DEZC62320572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234726e244b2d107f9a5cb9dbd5a0cece81436583a2d4831bbf9a737f45bf537. 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/DEZC62216965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5354344847deed2913f37fa254005d7fd929ef73cd1770ac7973b43635b56a. 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/DEZC62214244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc78bd91f5e0904e3ab91df5be0df3981300222bb2268dfd3f962dc25eb9534. 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/DEZC62214209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c91adaec146cbf6455eb06b1eb54318e7c4aaa664a59894a7a56ca079cec5. 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/DEZC62205025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac9e588b62d3242cc63bf089f5ae35002d19e486bf9afff5346c66165bef08. 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/DEZC62204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092e79780ab5857240706fbcb100779239966214d824c6973a764fa3eccfdab. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEZC62202372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaafd3b06d2099a5628fb38dfd1e04fbcf9b357f81d42562a1556858a4af9e37. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEZC62298318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be0d72cae1c8161acd1ff5e9b8204dacff1a0cea25038e43d71dc86127cade4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEZC62463595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2291fc8c0e9f85bd600315cfa933d0acab160e8eee9b7be10812027cdb97003. 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/DEZC62450992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85dcfc946f2cb1eb3a731fd4cf520cb169d5d03e4084fb7377b442c0aa87756. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEZC62447039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b6f995c113120a6bf6ae2119c688d454e8392f6f7b7e84a74ec63c66631dd1. 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/DEZC62444135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca8d1680e296b0281f849869a853a3ce388c888348f1bdba0ac2bc3615a743. 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/DEZC62440290.