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 0x869e8b52d49dbf3beaa55e6d8cc2ae0baa4b7ef342cfcb98d09af6d7ae02a7ca. 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/3b1d6758-ec62-4282-8dcc-7c879edd8271.json and https://artists.proofprofile.net/proofs/artist/3b1d6758-ec62-4282-8dcc-7c879edd8271.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 0xbaed912c9e2079716673c2470c59bc77c0427962b3281746e2d6d43d1bd6aebe. 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/QZTAX2272420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc419db67b2175fedbe3f22c51f6500a8979f8994c125b281db099f7a3b967ed7. 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/QZTAX2272423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83017815411dc3ca7998b21c800ffbfab4d6bf799affbfb589c1c87e8c448164. 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/QZTAX2272432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6230d13bba6ef6972f292860fd0fdae1e0c7221eb9bb64579d8cca0e1099d8. 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/QZTAX2272422.
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 0x00b53b6d55d240635b67559bca1291301dc22e501dd4cb64949ec7dbcce80940. 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/QZTAX2272419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc933b2a54b1d19b89410f295c03eccc81c4e481c962d98ec070469af3f2c7065. 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/QZTAX2272421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7da4f2f12cfd02ae35f296730ea041de2f685ee82a054764d48489634c9a07. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTAX2272424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6726a85e394f5941da9bf16d6add0d1e0a9f2d212c1bfe4959e094ac5f7c0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTAX2272425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea78649fc5ec50fd99bd36c4f4c3a69fb41540306d7bf0d53923d483151eef7a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTAX2272427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686e5a6198cdfdb9b4f4a6a0338cf431bc86ac4867c205ae78070170b408cb8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTAX2272428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1929a756f6669d8772a2f902f9e8b16c95485387121d992aa9b0625619b6bb. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZTAX2272429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933099b14061c681a9c9160d2bfa228fcda4a824f8667e46444c5218d8dd49b. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZTAX2272430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b923f0cda70d88f02211cc8e58794b21d3cf223adcb91d942c8bb5d2833f27b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTAX2272431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a019c435ab66aec63ee7c03f8c11c99c172e235038fa0edac4562a82d0413a7. 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/QZTAX2272433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9735a76a59e49a0b6d670bdcc996daa21016216602230edb42a82f8d331ae755. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTAX2272434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5648b1cfe7d1a3a4f4a50b87b5e303b9f404ee60967490753e97522b42192. 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/QZDA62308779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af94fc8f32f91025757cb461730a8d9a7136d65a35547cb814bbfd482a5364. 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/QZDA52402071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81d323c16256c0724a8d393c5857094ea869ef4fc06b358f36e8139fbd46ea4. 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/QZDA52402072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc15b8f10ce0598ef743b09551636609a48f133a069d9728b5f25110776a499. 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/QZDA52402073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d48e9a35449453a797ac2ede34c9b3b38a9e1c9d9106b59d4d67b399ad03af. 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/QZDA52402075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3394342bc977624ab72660847700a728256f46c41bd31cdfe3625c06cbb882b. 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/QZDA52402074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690abc12d95cf3d3f1fd7d872e9992f4a622968545192867f412236e2f3dfe9. 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/QZPLS2485984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a391190ba76e8f83722db0853bfb8790da4618cb0ba2e2d5b8d8eda1875865. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:43Z), 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/QZHN92517735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b4e9bbd99ef2b6a44ecebee225cfbeedd1b494d5d6fa5b842aada13916187. 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/QZDA82320990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1531308319314ba8c8f10f60d0caf429e4796acb013a6a2e8574079982505. 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/QZNWW2330265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82e4029d27e594edfdc0cd72c6d05c7cccc6334d95d86d051ae5746a11d4c2. 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/QZNWW2330266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fb6843730eb6e67c164302c71862e424bde8a9aaffbca5f85c256098563fc4. 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/QZNWW2330267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5aa25d5ae1d20234b18a3bc0c6ee2be656544c5536955dc5d5b34ba1994f8. 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/QZNWW2330268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5959f51415d893214007f22f91033c14dcd9e801696d14d892ecbd1b3142ca04. 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/QZNWW2330270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f63dcad846acea40cf1ec6cbc97748dd8e2fc72a10c69aa95ac73cbfc94e3. 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/QZNWW2330271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9792c963549fcbb3ce4346f13a49c5b4dc900643b2b10674a6809feec7b6f458. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWW2330272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58222d1fc069a918d8b8ce14a4c2ea885f6bffb1f2abc6c06296735617e16081. 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/QZNWW2330273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4542a7716726301181a0c1f4c9e8baf995ad03735b9a85181560994f515c306. 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/QZNWW2330274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcad3b2d78b05d3ba51f1c77ff4bd7f442671ef4587a3117cc0773bb15fdbc4. 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/QZNWW2330275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b9969cfba3178883811015fc0ebef5ed1610deafaa50ef64b449f5d6bb0d8e. 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/QZNWW2330269.