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 0xc66358ee0ba9d660d9507c205dc6d1564bf5f4086cbdb34f646d59cf00e6b795. 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/839efe88-2f6e-4f4e-8ed3-457452d7f70d.json and https://artists.proofprofile.net/proofs/artist/839efe88-2f6e-4f4e-8ed3-457452d7f70d.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 0x0538af4cd8a30aea54f509fa30785cfc841b7f480b95202d775a29f45368c69c. 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/QZK6L2313118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece036411b61778282d65671fc644cc2448f9a4860c6655b1cdc1c8af770c9d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZK6L2313120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf68e62edcbb6a7aae5d3ead13c79c60bcaf5299bcfbdd15eb97093738202723. 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/QZK6L2313121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d51a1eca6b6417d2f0f43bad8ee3c5b8a36a4cf99ff010d42a3064e76c70f94. 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/QZES82330412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7f338814deca9f87df2f3c4ae93d60cd27890ccb1038bf9cd4d52a6b360af. 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/QZHN42309797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340dba93b1417be8f449ad1a430f4a0b879e4a68a9903935b5df5e0a127554b1. 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/QZK6L2313125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24660fe1277538ea17e65c144bd7bc82c61f42bef373b17c4ccb23832bcc4acd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6L2313127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e37eef0e495a2599f4a9b01422301baf3f04a470b376080518f5d9a042fe8e0. 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/QZTBB2221573.
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 0xa0a17d472f56fbca9a00eb37754a486d160bbe491bd667f9b005a2321cce5c23. 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/QZK6L2313119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22a9c4c9cb3594434c47381d19620809f511803321ef387441fa7fc6278eb5e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6L2313124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802c9e50f44e25a885d26760484d20d3aa6d25474dd0912833055276661741f. 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/QZTBD2319431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9766b23c18f431c15df27409a61a8e560bc78ddea171d68bcc090d23ed4d1c7e. 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/QZTB32345808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3176d468d910f6221ad46cbec0f38b53bc5eff9715cc4671fc2e65015619a636. 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/QZTB52300625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e0b84a2c58a80e109c38d485a89a2f8cd4ca95b4a6e754523b9d6fc9158fb. 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/QZTAY2386145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefbe87962bcc6f37a9d753ad668c9f99d76134da8e8708f7743f12ae58c4f74. 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/QZWFL2320371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51d8f44a84ed4b6c919303882301644ccbcd3632dc2b65e9e2374e30bc9fc55. 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/QZHN82359987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b10ede8b7cd4c7871ab2831be47cf99cb23825fb38e284924b0d943beaa7ea8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZWFL2320369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02720c4ce4d4c3a76b670aeb6f01c5373dd0fae6b16dc5a6267353729bb8c3d. 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/QZWFL2320370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dec7e535ad70ef48f624afbd7525fba8772ee3bd6ddbd831f03eae5d9540d3. 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/QZTBC2305331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb530c3cb0360d0927ea21c5dd4e801275626b87ce98924c6b7518bccd5dc1dd9. 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/QZNWS2363059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e871536f70bb6ec572d1bac693b3f7630c37ada926ddb2fccc9314ff51df67. 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/QZK6J2343454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e59cb98162c1e316734c490481ff1fe2bd0995bb50e4697cfe686316c78757c. 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/QZNWS2363063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edacb93567c245a7cbb21c89fe081d632302c3d93a865b74e30c0dc3d9a6bab. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZMEN2364704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de1935ffc5322dbad5aa26cfbe2132ac530bdaa25671eed29a9537404f8a3b. 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/QZK6F2376655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6a5bbff5d6fc758ef7117a9a38c3f0bad98d156cefbec964a447e48b9206dd. 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/QZNWV2451283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6eedfa61c6479da5f685e9928b2e4ffdbe395d0ad004ae3491e979e038d8e5. 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/AUGBT2345563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3875f710f1ab84c04f8359aca28755822ae392a3422849fec1ec019f9c8e640. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AUGBT2345561.