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 0xfcf505a409b9520f2e1268010b1a97804859dfd7cfdc39b28b80a1ba57c440eb. 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/df2865a5-2aae-4af3-9661-0f9838f00854.json and https://artists.proofprofile.net/proofs/artist/df2865a5-2aae-4af3-9661-0f9838f00854.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 0x732fa127e75ae7536ab1e79731c06e285a3abbfb3d1d051f7bb010df8cc222ed. 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/SE5Q51800844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5e8d41933620f6f8e7795bbd74255b7d15e156f7d0f16bf95a942d335a1682. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SE5Q51800845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e711e024b3a7b23d798ac29dc53cc70547df34585c8310578e77677841eede0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5Q51813510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd158dbf8cdfc4420c07fc8205a2ea47a5e0379ec7b796c258656b5236e77e5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5Q51811216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16426e0a5431099c166cdbdb42270184282da0af594b5d035e4b0d15184dbf5e. 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/SE5Q51823348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72babf862be3f713ecb6e6668fec850d9461c56489c5455b4eb931d770d5a72. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE5Q51824691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7327ae6143695dff6aea426cc3f559427eab74bcc4df8e94996d8ab1b4b0fdb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SE5Q51829103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0070d9ace65464f84d9305c682ebd582db0a840eae8b82e3bc74dad768807a41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q51829102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c1d127e4db90618828adf5e29aefb8d35638aca85a5c74d9bd35ba2e69ed2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:57:40Z), 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/SE5Q51900739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb2645ecbf57923eeab40ab40aa194358b3a6b1ebd882da52dcc434e917ab93. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5Q51902699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b7fa751a0f86ff38f2026dde690337c6d255d1046c4dd478c4926826dc5a0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE5Q51902066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9514316040e9434205f40a34c0b372f02bdb534c58eb81c7c236ead9c461ac. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:06Z), 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/SE5Q52000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d916a2b8a5362ad61915bd9825a81c252b2b0c86ec3862c5c8585ee227dfecf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q51902932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b4e40b1c73abf9ee350a34c0455ced8ce337bbb31dd7d103e20b0b8365493. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE5Q52000923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758be0004e47a10e7d31d8479fb5bbc9d094ec2889926638ecaee7cfe90ad8ff. 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/SE5Q52001653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea057a97159325a0844dbd2ef161426155af1e5cbc8dbfd12f565c72613f775d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:39:51Z), 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/SE5Q52001625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54150ea38c4f0e282ef05357f660e57b87766609cbd6db30dd6785f29919cf5f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SE5Q52001710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240dbbd51f6dc95f38c9f77b13e1959b5f33571bc26e09817dabcb8b8a45018f. 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/SE5Q52002501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932b9f332b8205dd8028888305a942aeb4241cb54af1326b94f97a4fb0804ad. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/SE5Q52002150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b7b21507d069047841649c82032ecc5167d7e20f4803f4888bacb8316c39e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52002933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb90c2ead35d43958707b90b228ed9c0067ef61f10e56f52709d2ad22fe63e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE5Q52003467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f32386925885b1ffc9a1a218a2d66e07490ee07997621706e8eb5a45676cdef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE5Q52101340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d74af0c28bd295a05c9457a90a8e7a5674a3ad02b23e0ef408ec58216ff98f. 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/SE5Q52101192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5579d3584396a9e6242fe47a8fdf1fdbebd3447e2821608e9a8c7c115b69b648. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52101137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa76717dbdc6de6636d6d8f63764f402e084c65455c7ecd8be93617b8d8f759. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE5Q52101198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd863e6d08c370300d61ddc6cf0bea93d1d76f40d464436f50ef35ce373c9e99. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE5Q52101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd909201d9a8629c1096681e4abcc3178e3eb7c925db4eda0e7065ff89d99abb2. 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/SE5Q52101350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d54c732b85d14e539ce21a76a2e35f205116e9cfe72d208676d39463987718. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SE5Q52103067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c7e1a7851a1f778540fa53f0fba52673ac0495e6ec0d70e92d358b067b5dc4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:15:18Z), 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/SE5Q52103156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d42369c22d894746e289575e0d12d807944960030dd223fcfb29309288b33. 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/SE5Q52104238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8c2497c910a54847e086c661a48cb2da00217ab86220c9a68c5ae1789a027. 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/SE5Q51900894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0502c2eb1d88473c4d978c84f8e08a938062ec8025de696f15dee53d50d3972. 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/SE5Q51900896.