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 0x1acdc29db61c8b46278a0900b8d16988f28869b9aa1cc6c3170fe23a708d7d34. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c0d586b-a14d-4bc7-a24b-3e4c862f8cce.json and https://artists.proofprofile.net/proofs/artist/8c0d586b-a14d-4bc7-a24b-3e4c862f8cce.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 0x7026c1789ba827a36a54dc2fee2ea0b566a184285bd706a535aa65678b542b41. 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/QZRP42265981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a72ef681cc9b5b6745dc85e8b042edf0f0ff14ba509605816185eec6996267. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZRP42265979.
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 0xbd63ccc0cc0a25969717ae0d5286b6b56e26fd64a97d8d566ee9dedc8ac45d22. 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/QZPLS2354222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e51d38dd2bc786252ce4d9d4995c120d075eb2c008037cf84237edca36a837. 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/QZPLS2354223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119e6111759c42695052d23729f893aa41458165332b73e23ff7d160c690674c. 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/QZPLS2354234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd62d7486ce30a44f32109398c7301b53e4e236bbfe4c70df92241a3f1e2a8c. 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/QZWFF2377388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27da2f261b34d961a2cc95ef506237354d647cb3b96ad7d6b3a60ddd2a15d5e3. 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/QZWFF2377389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7905ce2a145baad49cb6e2fce8d5b829058430bdb1b335a9ba888466cbd600. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZWFF2377393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd841a3006b9290b7d8dbc3d6864138c92e3e65d5eee3084efc0399b37c145a81. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES62421332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6c3d8df9f76f97f125ba67362f269eaa8067b0f4fc5ba1b2e91bfc05105d3. 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/QZES62421333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301f78bd3f43631546857cbd57df0d065953b5cfc33dce6a8d4859023db1626e. 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/QZES62421340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262013214d21fc66ef616af686468553803299689aa549cc4a7c63b721cb92e2. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZES62421339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c785632a30cff6753358b212e265e4f67cec4216c2825046d9009e9de4abb11. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZES62421347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e364be71cf8ab608e22b6283a53b27017ec560b88beea2c0a417027ca6063. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZES62421348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c3c334c672a49c9f651d1d9fa440b5a08ddcbfb446eb11f621ffcbf807f33b. 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/QZNWS2483097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e722cb4aa0d9552c77f6e47c8ce84946ae487fa57d579e47222268a52493a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWS2483098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672a71a4e9d20e9a27905c100b8732fa4e03174191d35e6accf407f34be6db68. 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/QZNWS2483099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c6e6a4b4fe1a0cbc8cc3a46a12182ec37300af1dca9dfdb4257a042cbadfa. 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/QZNWS2483100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baca99dfcbc902978fc52b15e6553359e5d07735267a1c94b1f60e2a40a71b1. 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/QZNWS2483101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072128fe203578040971609e5fccfbfd247c5d0aee9bf3e932189a16a94fb4bb. 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/QZNWS2483103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aba0dd36643660ed7fb2b415aa93cd0533f23c481eae1803d2a85f71df36aa. 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/QZNWS2483105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181ea411461b6759b507a83402701842c3bf588000fdbe9bd777cbf15494291. 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/QZNWS2483127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf73f071aba9b313db316246aca6ef671b6bc31de2bdf119ca8c584eb3c122af. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWS2483102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa529f5d67a364d41d809e604750a15a38d2f178be0c474a92d1b7b2c733060e. 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/QZNWS2483117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ead541bca2995545bd0fb09664b0f605b0c747e65d0198f11a645dc3f7083. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZNWS2483121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1502b286b822e75acc6d903310977e1d1683f5ac437c1b005a2dac8544eb1058. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES62556763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65e646fa099382bf5875beda7e1ba537339ab46e8c15c1e2d7e09292f40beb. 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/QZES62556757.