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 0xf3f2ba2863d1305a417f30d42f3a580fe33de77088a4df1f18789904c1e9a8b1. 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/d6f41f5e-0d50-4ac1-a0de-320dd29f1b64.json and https://artists.proofprofile.net/proofs/artist/d6f41f5e-0d50-4ac1-a0de-320dd29f1b64.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 0xde580dc51c42f66fd69dd9bcaf4b10f99db3d845c5c5cd7e6414c68907897778. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:45Z), 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/TCJPG1742210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7884ce4e7f1c6116647b27538512f936c64311e7e60d0e2889e0e0b101a4b6e. 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/GBLFP1656071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4303cbd6b61481190d7cbae6f31db9d35e015f08f5dc3b59e9155fece877597. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBLFP1656077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8c6a9ad5c3f5b2069096946dc8a6e3201cab7c9857e2dd41fe0ec6efefb7c. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:22:14Z), 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/GBLFP1656079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d9fd1cd2686cacfd1f5d8412b10b9bbe3985469c0c9e1b06978c2dd24588b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:15Z), 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/GBLFP1656083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa016dc0d7505e0b1c1b1429610bc7d0f5a4398b9edf61987805a9c0d5b49153f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLFP1656099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148deeffe5b0eb93729ed0c88bbc54a479a4a54f7e4aa63a1d1d27309fed57a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPF1786106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb489649696475d342d394b52f49e80c4767f1c77cb3f048620656ba36db0cbd. 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/QZDA51835100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099430b59df998f58dc41dbeb1d18e9c831e2d08e9e23f7f2c58051c42a9650. 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/QZDA51835106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18f9278d143ad1912d276cab7f08d824b47d835e3e7d76aa0cdfdcf32ee6811. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:25Z), 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/QZDA51835108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a24da945da5a00261fa4edb0998130a82257884253c27c2db6dac60e4b00cc4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPL2015789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614cfe9c55f94efccb78ae56b7f4b9fe5c2cec24bdb11978791f5d06d784fdff. 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/QZES82107307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629018e5f10e032f363ec205dc412ca7a857b3ea907f87134071efaad50209a0. 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/QZES82107309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5fde1eaafda07e9089bef0df702b369f476eb29ea115b4a1384ef85802dc8c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZES82107311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036130b51bb4d2e79e6b36633867f4f9f82d6612902073ae45910795250cf471. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEQ2037914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65537789d92788a19cf86446d6ed56119224cae4f49769c48d625b1ff1627584. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZES82107303.
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 0xb1e28e38953920527fb3c401517fe68e9a5bfd5b4ed8828732f14d50ba52d28c. 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/QZES82107304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9effbae590ff0a7758a33c2f17a5b494be5ae0ea937b961107bd04d5bed20ebd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES82107305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b048d9f56a985e7c5f4be0dc4a94631c2886701999db0b9038ff1ce1d23d1e3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES82107306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260456995ce098aa478c49528217cb95cc4d45557ccfa93131bc78ac6c61021d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES82107310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9654b2022e26ab3b428d95f68602d8f6a42e8fd3cc2442445d678f8034c922. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZES82107312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6483496bd6cd07cc61dcc5e6a6d1bef4a8978ba65180dc3c60cfbb7cd2adebf. 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/QZES82107313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1777a4cc573328f85f6c949d5e10796bb381ab82c20b45358441181b521ae5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES82107314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9e8fcf2672d3feca04010bedf786b2fa453ecbe86a80cee0305b9829dda59. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZES82107315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5338e76843742dc7fcd55fd27e4121868917a3b39fa1215360938b2b3ed97a2b. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZES82107316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f607c75f68e91f178ecd0457577b452a3aaab0df5b812b5add843742fe7316. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES82107317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb939d742a16ccdc292550b2c9b16a3fa6fc1c6b53df51462c9ef36016ef511e7. 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/QMFME2157530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd3f834254f591fd6b79720d44ed71a485291baf4bad07f5bed2859d373f0b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMFME2157529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e8d75ec6058d5eb54eccbe2f4fbe18a44b5e7443109afc25cd8b49e91c1fc7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMFME2157525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d52296eff8f11220c4100d400621d8f93a116116983cfea330110f1d64e0a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM42K1959207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba491b1ce0a20d9e52228d8dd0de18343a82da7d02744aaec88ddea9bd90493b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM42K1980116.