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 0xb48b5208e35e3af966a577fd08ec8da8f806e0859e671ba3a5be601b1ff00dfe. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31b6bb56-d6ab-4ac4-8d0c-d9f599636b35.json and https://artists.proofprofile.net/proofs/artist/31b6bb56-d6ab-4ac4-8d0c-d9f599636b35.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 0x79a495ed5756420e07c82dfc15af682fa9e833b98d9f947c08b274dbf432f546. 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/USCGH1736999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4976a8c89e9845f07c2cb1d84336be0c681ff8d02a3ef7775b9247a88d0b29b. 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/USCGH1737000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e0ba51cbabb7b8f617817c301aa52baab9b62bca4eb9b65118dbb15c16162. 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/USCGH1737001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020e2521999c00d12b239698b7b7803c7ac9877d8819248e4879b8458a3299b. 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/USCGH1737002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d578e6fee0cdb80058961d11c4736d006e7a635a3a608ac5cbdf565cf7d31d8. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USCGH1737003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb00616bb6a1fcdae9b5194b9869450d38c8049fd382b8185d293ccd50a6b14. 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/USCGH1737005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ce06c1ae82cb0c6f2e995a3e684366fc87d572abe55b8d724e4459b9dbe637. 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/USCGH1737006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe120eeb1fd6dc6a1abdd90ed8631872dcf3ff8abcfa989e939a719f89949a09c. 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/USCGH1736997.
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 0xf3802e51c1453265e71e1a0ab45d1f3406b37cd43e4f504765fa81b363ff2443. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USCGH1736998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d79169116e9d083913405f7b4cb348a3a239dd2a795d000eb2109e83f4c485. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USCGH1737004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2de69e854be61aceb2b9d56d74e5d07a07ddf2ca945ce2f3d3d400eb295b7. 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/QZTB62425616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90413e9bcc850be0c8277f8802021e7d80938e03d23ac7e47f27196f83a4f39. 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/QZTB82310385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918021263772f88dba876fc9842d9e8684a510ac3196af995d914d7989727549. 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/QZNWV2163497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650e85889d2fc039ccc2cb98557821e2d5811496e1c0006d15d12c41d380cde. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWV2163494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf92d1ddeacd96463d864adccda4a72b2a183d6a8c8487cba7bba3a83062eaa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWV2163495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a7a7c7cbd98f00332e20a70fbd131a5883661f6bf690abab4b568241c4c0d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWV2163496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1f4d5b10e0126817c8a83cfadc113ccc209482536c1be8795fcba4f639975. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWV2163498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5149f0df7c25e8c6b3096b6f1782a8ec7e8a0af6b0cba9857cc94189b066dff3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWV2163499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c3c5585c8bb890e684c3dba8be7afcefbd910854dbd6a9fd913219c5a1335. 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/USHM21821081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c581b37948e93edfbf0d8ddc57bfb05789c45ce5240b473369db0a255d61fa. 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/QZES51947995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76165dd478d7b4eb65ce8f8069c5bf6f8337933a22aa1988270ecbb818881b8a. 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/QZDA61933232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88b31a8b61722ed2287786988d6be0a6567c464edf3a72724a314f4a09bad4. 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/QZDA42202855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5103d4fcd35369b8c197d3230ccdf5fc8bb2d71ce95bc91ca815dcbc2d53730c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA42202856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a22c303912eb46a15a458b911030f9260e022366f83301c9ed60fd8c9c43921. 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/QZDA42202857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce24a82b71928ccfd4857119bc9414aa540ee7b30b451cee813201502579bf16. 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/QZDA42202860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbfbc6f105eabbc49bcf2a072649d12c35d58eb72d109b2a527802560925a32. 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/QZDA42202861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ae3dce1be8dd3fae09e0eed196640cefa94e9cbb3ac1a599fd3814e0d4229. 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/QZDA42202862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc81f5c84821a5c7320f9edcf1b2a1c304424027baf73ea233e6dd8ea7165ac. 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/QZDA42202864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f0fa9c02726b0b40d6cda7c98a9601db9f7549a772c20344cab840f91c453c. 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/QZDA42202866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624413d307947ff1b40d3e67d289cdf69bf71327259de2fc7d2e9e267f5ee5c4. 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/QZDA42202867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a6549aa45630e87610b51349154801b5976e8eb5dedbaed601155caab25d2f. 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/QZNWU2198368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a411897794fadf85eddbcff84ad4c4046ae8744bca29431be6dd8ae127aaf4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZDA42202872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d952555aee907e1930cc9be1ee0418c99aa2b8ddcaa79d3dfdfc79ea7e65db3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA42202873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841421ab42fd1865abed76ea947526c9d0bd2bcdae5a15f55edd31ff30b1cbc. 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/QZDA42202874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc6ab5a1126b17edf6591454026e73602e8104c4119ac1cb1fdc4783a54c7b. 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/TCADA1713850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a57fcc37ad194b4520b5e459b4e1a0c53019ec9c50e80ecfcdfd5f0007fb86. 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/TCADA1713881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f291d4446a15fb61b5d3accb01749212faca0ba38bf32c43b382837a8a724c. 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/TCADA1713875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d213b2db401dd024746d77bf5b41d0fed93c0b51422ed7bc22212248813506. 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/TCADE1738612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561543386f208e19a3a82dd078687a8d130156497f91a5d07a6b2cb577be5f4a. 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/QZMEP2252092.