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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa807d307907f716e4dc078646aee0fc8f9f9ed02841eb4f4c519c29812dd721f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f8a895-df43-4327-b22e-72a0d19d2bae.json and https://artists.proofprofile.net/proofs/artist/a7f8a895-df43-4327-b22e-72a0d19d2bae.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a7dcb3ab649c45b07a7a8fce044a2450ee432b6b3111cfd9010eaae3b99e1. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:01:36Z), 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/FRS182116375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b007589677f5e55eefb317a1ffc69a835ca1b50ad11576fdc19534e7ca366. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUMAG9600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ba3e257793168d73d0e6ac4eaf0c61996f884fdee61d817bb9d05a939f8a6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HUA182136517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eed433f9b436d426d114cb40578f390c3197949d6af42365926f0fe841c8561. 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/HUA182136501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296ec9f8952f07bdefa3574ad660f97309b5ce3ac9c1dcabad24f07dc100601. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA182136518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232816375dc141eedfad88d9529aabbf9d256779600fd0165f24aee2fff0e94f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/HUA182136502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739bd74fb9b95c0bc7b048a89e676ec6421d3e48c7bfc627408c0678aae2bb7. 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/HUA182136519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178e92be7bd456c20f7da69e8418617bf0700d3a500f56d42dc92d5550156c72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA182136520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0a715496e1ee9890e94bb7efe17622e34fd943b2fffba27859847e7d794785. 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/HUA182136521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe779c9cd8f5d22a9f2583abaa0cbfe2074808afe950c3eb47c0e21a5b0184337. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HUA182136506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9207fdc2c42b430d393eb2ba2a63003100eeeabdde24e86b011e68cf808ed653. 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/HUA182136522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a84126a4dc3ca2d89f4d74ebcae94210a5bace2e468d7f32e0a1fc31b52260. 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/HUA182136507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b691883d2e45d3b347919a1b2d9b1794b9bf40a405b3c8f45035eb5adea31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA182136523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bd13ca2facd9192840e475d49e6b0c54cb9c3931d1accffc0813a7bc11d488. 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/HUA182136508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dbd12939ef5599d90221c8dde996db6e01ba71f53f69b6d57acc8756f9203f. 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/HAU182136510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd238158bf8e5bf2dd2f7fb273a8d938f1e8265f2ecb793985cdb5c386e250921. 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/HUA182136511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16087848ff5a3dd61efd30e979bf75a76e6d0e7e3b75c6dda36a4ac7f363b3f. 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/HUA182136512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ac9863bb4be4eae8b702956a719711e5cbe23e3f6ecb02a287ad723da0898. 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/HUA182136513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257e87a55d5365fa70f308bb16e0f709bd99d49258deb3aae0e60402e4b636a2. 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/HUA182136515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8ee8558e3a2b925906dfde387df7fdf76c247f138d99d851bd7955d0d55f3f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HUA182136503.
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 0xdca4e60bfd0e5da51c7d68c0162cc0ffc6af07caadc798ebd9e166653f4bba34. 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/HUA182136504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c22d71065565fa55d252d9905c2f504c1058f33036ce709f3c2184281657d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HUA182136505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ecaf2ac73ba2e792b6c2d24a57170a8a93d183c6645f652531ac72991998d6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HUA182136524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb748d370ab3cd7fff7bba5319e9d044accf270d6143dac83701928d3186fa94. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/HUA182136525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84edde634e82f4ccdababba477038b8167559ed626596a4d07285c4f12c24623. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/HUA182136509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34202c0bb9ec3fd9d29c69d30fd22ae43b70feaa39693138d52fee2da7e2f3c3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUA182136526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a873c2b690984377e63b2ca2954179c9c6cdee08b2a41f7fb836355883ea11. 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/HUA182136527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda4960cb36f45b2c7b0ae4b3c0136d7cb7de994fa0c044af27f58a28c5a409c. 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/HUA182136528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda84b282641428826f2c0f091eb45fe92c1b8e4e8b5dc7c08d8283ae6a9c91. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUA182136514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d08cedf19911f583ad9fd2b587e157880a68e5020f26ca7a208d989ac34dcc. 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/HAU182136516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e05ead57cf126e2cbffd15a38091922cf0355224e0efb7f4059b35a2dd615e. 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/HUA257103101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5489f709046f66b283e14dec27d3f147aa3df981de8d8b6c52b3a23355d39280. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA253794117.