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 0x2993f57ab9ca600ffac543560921f7642b5497a08d55f5c2522f45163c35e2f2. 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/8bfe6f70-1e6c-432d-adf4-d7a11a7c880d.json and https://artists.proofprofile.net/proofs/artist/8bfe6f70-1e6c-432d-adf4-d7a11a7c880d.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 0x77ec41b7bfec554f27385a30d924a380a9f1ace85413cc9d785da4d0919609a6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZDA61887307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b29e11dcb2ae4e2376fb19539ed0c2c45806d2851e30089ea17d9b5abae8d32. 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/QZDA61887308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400492871eb5ad7dd08e315c273263e8e008aa104d6ea1e44a0d7a8a86bde13b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA61887312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6881a874d7fb22247cbd7872c33469460380ef8396cc395bb0580c9e4c69f363. 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/QZDA61887318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b38412e8d8cb54ea726a4331f7ea423c1625718f2a9ec89a7c652aaa8261d24. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA61887320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0651be90cee1b8608333381070af7e89976f2a4d50fba8a673c16eceabed11c7. 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/QZDA61887321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7cc4c55c26346f4831ca50ba0ace3c0b291d643e4a23cc1045e2370832dfb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:16Z), 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/QZDA41998603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b48fc4b765a1eac4312e3a3ff64b7c8e946f68fd1d732ac512368549495c7a. 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/QZDA41998606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ee5b1902c4f8b33760283e8a84527f1e374e288874aa96a83c44584af1026. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:28:34Z), 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/QZDA41998614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86638eb9ec7a8e7df4ec1a7c2328230942deeb4fa4d51d136343a2abb34cf3f2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:35Z), 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/QZHN51979270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fb6334f66c898418068e24428b0fcade2088f50c1e899f900ac3592a29d401. 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/QZHN51979272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7818c6b64a5e8b4eb3656e54b5f461575bb0d62cfcf6fc446214add023a9ff. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN51979275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d913ef3c358794e570d46c765b81872acdc3c567c3118079475c9b84721e5a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:30Z), 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/QZHN51979276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b9c3305192340afc11a30f2f1296776e4f44463347d43b3698881a60e2d05. 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/QZHN51979279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260eae19c6cde85566fb0233d53840170f2c0eefdb5751c22d799401da74700. 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/QZHN32157049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb566c307f3dab5f821db795e84a4c484a9aca0173fcd6f87b1a2aa7e7c9fc4fe. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:48Z), 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/QZNWZ2047578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91740ef25e81ab4850ec51306da654e3fe564d801082e6318f50123345a0dc5b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32157056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364d0f441ac4e507104925bb6a0ebd2332408878ae496347c6cffe0bed4a090a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:59Z), 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/QZDA52138495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b5aa8509d100e09c53b64111eac45e71527cbfc60ee9e8c41ea8c2841002e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEBT92200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03662b54387dd765e6f71feec243d4647005f30bb40abe0d388e9c053584a974. 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/DEBT92200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60400657734dd51a3fa581ce6d4ed71dbfb6c58c554f69f844a8298122348769. 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/DEBT92200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d90c0252719ed78afb369b1d7dca22d7bdb88a70fa67a58318bc6bd7d35b38. 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/DEBT92200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b5aa8509d100e09c53b64111eac45e71527cbfc60ee9e8c41ea8c2841002e. 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/DEBT92200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a9af105119ea6a349b098a2f90a29de97a2880190022cf0e1bcddedc0ba04. 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/DEBT92200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da5e9d7372c90763b75f5810f308d445de2275c76a9dcf7bc614b0a8386341. 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/DEBT92200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20767cb5540670071911872feb5372ed298734ea7507b5d22545521866929dac. 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/DEBT92200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28aef7dfdac3dedd4e679624014de1954cea42908c8c6226bff328f6828c934. 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/DEBT92200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6c9362b26948f840c4449872b8ea7b97805267db2b250cdb49e73535f6380. 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/DEBT92200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e035cfa6889deb19a1b0ce42f5ec0fdacce5606ca7b8d9a407e077d23cb241. 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/DEBT92200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1255cd441ef162eb24a127ce83f079159d8604d11cde13f3fd112f01638c02. 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/DEBT92200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc6481b9045a28aac86018efcc05f3191bf801e9b8bd6d011d8d08b12b0449. 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/DEBT92200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d436b4a979231db57d3d389fe6eaf07d5650793e306e63b3012451fb01e5fa6. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEBT92400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d403b2f88451b7e2bb70cc69897e356728864bd0c049aa47ab51dde8ec380a9. 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/DEBT92400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3c6e0a0fbdeb7ad553c15d153b07c39d92712b07c07079d46d4dd72b31b98b. 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/DEBT92400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e1dbdcc932d4cc778979b73f637ae5601d8cc60ae94b9c1205f4db671b6199. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEBT92400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004736b4ba3e5db64c17c49c732a6096d8e10567c55a9959bc91a5e88a0339b2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEBT92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf41aa41b6da5a53a7570677a688ae38fbb4c14d2f3f573bf2ad0ac98e474a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEBT92400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75db386cdeda9ef85366fedd97a8a28373444681afe43fac464eb07daabf5c0a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEBT92400225.