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 0x0bb0fada5892022d6bd8504a42620691d185b19e8ef48adc45cc2e2bd5429fdf. 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/05255571-253c-4ac3-9108-9b23a790c344.json and https://artists.proofprofile.net/proofs/artist/05255571-253c-4ac3-9108-9b23a790c344.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 0x049dbfa7bc50be5d5a18c3092099c408649fc6c163b3fcded9010283399a617e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN92546335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad24f6d0ffd71c6fd97f249f6e7c2b660afa2692f13b7a87fac457be503ac48. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN62556625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7046b3d3458aadc040e97be53ca62ad474322bbab5e11c375a9ab2d3afebe55. 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/QZHN82538525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61641360a75b29054fc06b7624897d0e181da76bd4be953123111f3cd37bec2. 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/QZES92540199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89511b4326c5f49e3c01ba60913c74d0b66c4bb0ada982b535e5458b53fd87cd. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:06Z), 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/QZES92503042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd0d540e64fc430fd4d8690073a286ae8b8612459e9a6c1a612e431f51ff332. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES82559404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174e49661fb4ea8462f79edcee6ba20acb1589924866220dbf5b2ecdebaa59a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52538898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ee99543c4ca264c2bca0441a175bbfd409529cd9c126fc584055e7501d699. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNB2545213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a410abf33c6b5a327b13534a82e80b1bf011ff33e5a249086b56c3c25418755. 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/QZHNB2542358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a93d7c7d8f22310fbcae5c4afa514f78e9f3572847494a28b91944c2390b06e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:31Z), 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/QZHNB2510134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde3051750cb875bd349602aee2152c06d8a29c23d739f297203a21acfc0d06b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:06:53Z), 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/QZHN52536998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32811a2f7c2aeb9ef948e21e42b9210544787e9526e36be6e57b8e6607408bc9. 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/QZHNB2545208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69999dc136d32657751157769619e7738d917402443d71b4f4eddb007d78170. 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/QZHNB2545231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069707411dc5f271f1439833bdb96b1f3be5f7601ed8906af02802b06fa3af2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHNB2545229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cbd970368d75599d71c6f718f8334cf6e5238190a1905e9f4e1f9f0965caf6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB2545230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815ad83e4d40bbedb171ae805686e1105574ff3ead11263e4a54cce2c8bf06cc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNC2589841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d25488c5bb4833ad66eedbe2bca73d51ae93c70464645aa291bcf743a7267. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6P2524727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab726434393bad55875b7d78af7e7cbddb616f97f747a42e9c2dfd0eb5b099. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6N2558313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f1509ab60fbc44ca78f9a07a0701d5cb4536fec1763b4b1a0c24bba5024b3. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZK6J2539703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6276a7ff791b9c042e5abb00e7ef4b7cb0925d02bd2c4d5d02b4fe4a76f00. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6J2539801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08761580ffc44afc19f1c12f653d2b1325b21b17442d7ca07161488f99061b3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6F2530292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7214d146ffdd02686d6c1c9d2a11c81f4519e9c0afe0ae6dd5b2645347cb248c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB92584435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f84868ff099fa6d3bdeb937c5064ebc87dea077006df2da7c09fa8b901acd9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFG2555729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8e96568d4e80b26ab080534f23322406c8bfb5870107fcfde6b858b711d90. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFG2550195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb82453b867954353ecb409ba5d8a83c53f2549ef6179a3e86aa0166ecdd22e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:28Z), 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/QZZ7M2594862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea49c93b130cc10683145d938bc1368aeebe472ce48f40cc1e2e52b8da9f2bce. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT6E92513482.