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 0x9076ef6656b6552e7d3bfc570aaeea874f56fdf583bf1528dba685f75b70fac1. 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/ddd8fe10-b084-451c-8a9a-41cf4ef54b59.json and https://artists.proofprofile.net/proofs/artist/ddd8fe10-b084-451c-8a9a-41cf4ef54b59.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 0x4b0ddff35cf44b6bfcf8be2aaae1c057b6a959efd482d95b9dfab5e9559ed66c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUA831000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84844abf42c77eb1a3fb77d82a6dae05ff9a3d4d87318409ca9fc6a42d176fc7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/HUA831000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6cd8fe17f2fd0714a0db605bea8887f51bd258dfe5b4cec7f7c0f38889463. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/HUA831000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251a9bc251e30b29aa243fe72bd4557735eb7de48dc870a0da12574e7c9cd2a3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:08:46Z), 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/HUA831000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39a487d113cc248ddf2c17a35ce96b538463ec57ce712f761085e2556f8dc5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/HUA831000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1b5bae26c832ef2664dcbd710958297e5be8d01a0f9b2dd96abf1a1fcf7db. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUA831000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e3e274495b22dbedf2168b858645c7c306104ac390ec44146aac5b8c01ab6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HUA831000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99f0b2069eaf9a32218c8f37505bf8ef0f895a6c7147667ac8eef73a22e2cac. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HUA831000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30054e154c800cd4e347b351df441f71539ece920b58c6b7c2bd86ada809ae92. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HUA831000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c12e81b30723f1123e4bbc9889c29cbbcd560aa3edb32c8fa0397263fff82. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA831000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f559d64c66afd8542785bb07805b8227b615d4f1409eed3adc4a5e28b717586. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/HUA831000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca1e2747f395978d33528aa4fa069c9aad4cbc9eb6c29feaaf4bca8721ee017. 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/HUA831000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ecf02d32515d4dd370f3dfc1b848832492c34f1aff4fa284f424729c6e16c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:49Z), 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/HUA831000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeae66cd127fa99df498e260b851568bd1437d8e2a477930434373afb9b07097. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/HUA831000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c8b19ad67d2169a824c35b6954f2f9087122f4ca49bb62810197d28d38433e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:54:04Z), 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/HUA831000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c551c4318da8922e000d98b72787a946e2f7bd67892b5bce71ddda68422b9d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:10:55Z), 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/HUA831000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f11488c4e2f34f01050d34051631fe55bb6320799b3c2624ecb95ca918d6ef5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:46:54Z), 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/HUA831000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ca54179974f3f76fd159fa59e72fc7d16d5d3f9ff6009044e33b46825b22e. 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/HUA831000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b18df1adb6405ba52d1c8069eeb51ee88b1e652cefa13ab836963a1c00e117. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HUA831000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772a2d8e4c715b9a15fdcf93855778b34be3854e00b033363be5bc743d99bfe. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/HUA831000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee98d0a064e63806e805a843fe016dc13abb2753e1fa31e06cfb194998a1ccc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:54:08Z), 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/HUA831000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcca29f971575d976d781f36fe37095fadd2cc9cc3c144cb8ac410b969d2ac7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:00Z), 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/HUA831000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3a41b365d9b79dd3c74351a8936ad8b0ef5655ea24a379cc90fb1825d327d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:59Z), 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/HUA831000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c419eeda30091c6939792f5dcfc9f591e7d592fa3e5bb06d8e1009fbbb47d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:37:47Z), 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/HUA831000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca818f6f343be75ca4a8c33f945db92b800c5c10d510032606ca3c4f391fa7e. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/HUA831000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe208afe600415d7c6fbb0db9f7080b3d5961289ae1007ededf046db3233ea. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:11Z), 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/HUA831000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc148c6cedf189ab1172595c4436ab494b63122d9a2fc39b9433e75ead2dbdc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HUA831000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54532a428009d7417130d749fabd2e72178a885a6d84f0c6329e63d20baefa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:02Z), 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/HUA831000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80e3c75ebe5dd32cc2d74615d6dc6c9de092bb79e2a5c4b6b7ce8f52e0258f3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HUA831000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb14028d93b335179ba2aa8cbcc4dfaa4f3acd643a37d79ea6674ba74b8f2ea7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR96X2155854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b7730de32e7fa7d347a5c1f957d9ea8f325cbf4ca5079828ff8e560cac987f. 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/FRX201834486.