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 0xfe034b7602b4ec747b349ff566070dc7ef1ebd5c3e8ce309641b5b95761fcc4d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d8927bb-bc3b-4848-9868-f1ed2d67d435.json and https://artists.proofprofile.net/proofs/artist/5d8927bb-bc3b-4848-9868-f1ed2d67d435.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 0xd36ab174e32a18c5b19d972860ec425adc9df5c2d1c1129bfd2f2246c827c6ac. 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/SE5SD2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a682203d6990a5cba6fe1b1491c3daea0aaee8e371fd0b317da8fcdcde41c4. 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/SE5SD2400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fee3f710ebb47baa54cacaf717484945ddce243db383e7d4ba36217a008935. 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/SE5SD2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b781b28e48a8b209d84a19be15d33d4d5cc817020ce98023c98524b66bde860. 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/SE5SD2400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7bf0c21a6b6fd1f6cc80cd2bff635eb730250809cf423d06cf0628d201b57. 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/SE5SD2400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e974fb2b664f86bc575fe35400d06eba15da0cd650e584d595d3be29f95dab. 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/SE5SD2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73603bc27812551f5e40808bf5eba0ec6d269914861ff91b3041a15b56e6a01f. 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/SE5SD2400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30f37d06ca437716f5ef73794bbe8f760876f8badde165d89ce9dfa2e8207e. 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/SE5SD2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83d04a83d9e952c9037f4e41b680810c9e9a33111f27237345a7359034cc371. 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/SE5SD2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0c852c554c6da17fdc991a66f9f7455bb219fbb2667caca6abdb3edad9c22c. 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/SE5SD2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffae444044ff5f080e581ad85757ee38aeb28d325e3ea793a739ec8b9d92016. 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/SE5SD2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a09d8e781424358814f7e20e3d089310c9b2acf4eacf960a68b0a1495484ca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE5SD2400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ecba41d3b0898dbe1b0018442cec9ee413341912679fd75ef5b7cdb2e8e496. 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/SE5SD2400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf33482a46948d00a3c4016676141395325e51061f0ca1521723c3b7391f5f3. 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/SEVQI1202401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff0a601e5d4a1e0c8d16f0f198fdeafa12abe3f61f1070150b785ed4d21cb9. 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/SEVQI1202402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa5856f50d897e754a50e9912fb63f1d69f89a6e86124efbfe4abe1ad7b2e9. 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/SEVQI1202403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85615b30700b75ec5ae9457ae7225924e1f2182279758d499d416c790ad9c42c. 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/SEVQI1202404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c430e6af65255f85cb3a72306584ddefe1c6108e76bfec98cb9e45bfacb20e. 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/SEVQI1202405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b41124ec37b9a00d33b7aaa8696a7ac62f452c40ec95d7be54d1d2f80eff729. 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/SEVQI1202406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae0027b90fc1f787149727568689d36766493c943732a5a171904202facba8c. 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/SEVQI1202407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87acfcf07e6c8725b5f9419b850085fed0e5469d95fe04e43bcb7714af63461. 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/SEVQI1202408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5a959345c3fc01d7e45a3729cd97ae261489e86787473741a9e6e3e7e68325. 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/SEVQI1202409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf2a242ac17d196fd26ca600e6fcbed6833ae69553571fab39c6f77e2fa63c. 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/SEVQI1202410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc13d4345c5ab0460d67eaaf95be20caa98826dd46f41776dadc91a31ccd7c7. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/SEVQI1202411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c2bce3c67ca3ad6e16c5e5126760efc46af64f79a56e4f2c2357391ec232d3. 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/SEVQI1202412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece2c5cea588e5fe6c2ee009858f25b12c88b0585934a35e0d3e70e95a47dd7a. 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/SEVQI1202413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71328eb606da6865ba0187243aeb981cef03937ed68c6db68208ad3168bef3c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SEXAT0900701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98f8a61a88a2e6a31472eeae0623a948c6b45d6c4f6649e14e62d378b7de3d6. 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/SEXAT0900702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090de77fc79040ffd0f37fba3dbf1cf8afb95be4b665db08a0e54f1cd9a28968. 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/SEXAT0900703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdc80418586cfea4ef59b6781ef2f2048ba39e167d8d1b730af4acb7a84b6d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/SEXAT0900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095b84a7e2f4278701e18f2959bfbd4ab7f0b95e94a7ba33714dc2ea56d93d4. 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/SEXAT0900705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6b1537453200c64fdf47b7d7275b7027fe06e6d482f671c09d0d059ebc7eb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEXAT0900706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3408c12599b38ae1086baef774c0828978e76dac696df41332fd7e62486d73cc. 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/SEXAT0900707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbcdcd66064cc8dc03e63866f26a48f513ca96de9d4e26484f3b4e5c48fdbee. 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/SEXAT0900708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27010dcd193ce04665dbad3e9b4cb0702474f5c657d20d5bb1911034cd6fbac. 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/SEXAT0900709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60886568c786f6bcb38b4c9e37b038603e4b353e25269d3cfe90659f8065a37. 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/SEXAT0900710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c779760369adf527c5fb4ed9172789e6fa5abefaf36ecc803abdb9ebae7516. 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/SEXAT0900711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ccebff660833a28327ac7e50816ca198ac4463fbf1215c86270e4a45707b0c. 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/SEXAT0900712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d6f74435b4836fe87bb3cce361d7ea796f9c1c85247214dbe15ea950bfdc3c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SEXAT0900713.