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 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 0xc90d3909fbcb1f075baa397992c6c3a1187d1821edfbd1bd14232c87f6e3735a. 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/9775b925-1006-4a88-a209-68f5904c82a0.json and https://artists.proofprofile.net/proofs/artist/9775b925-1006-4a88-a209-68f5904c82a0.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 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 0x95cf98656affaccaebd223837f5658d018e0cd11bcf0317d3897bb587f4ac416. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCJPH1835039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e71273b3a97adad2aed61b8adeb11fd82a0008aa1c4c4fb2b5a8d6cbb2f443. 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/TCJPH1835051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b96cf6f60ef19aefd05185a4360b4b4af733b29a9a520980c1f67844202e46. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCJPH1830861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b3ae4c33ae2f70467057c5504ddec08caf2b78e4c7e71d067893e801441371. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCJPH1830862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9364e4ca7f6e019a8e6c4338baeac77887a635f198446c2789e5005f3d216a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCJPH1830863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe505a9f67bf8e9daacd9f91c89ccbe738060ca26aa241cf42b3b288ac0ce80ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPH1835236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b1d17acc73f250cb27683618d3d538fee82340bd12cc717b176631082af7f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/TCJPH1835237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e67eea334b2c01eff514dbc099713be2c3b4edcfd8a75278e878dfe2ccd35. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPH1835239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3f0b1ef401a1c082aa137c981b3d0c8bfb587cab9b76c79352f1c973e30201. 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/TCJPH1835240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10329878b9f10921b95da31fafe7245846578a6bbf43ab8027306b5ccf5c97b4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCJPH1835241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e38ca2b75949ccd2f8113228ca5a16b72275eeb6098652c906cea607bca5aa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCJPH1835243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a2bfa9b5f55eb166c257bb4703ce769b91b7563b6ae5b6b5c72ca4dbbf86b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPH1835217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0c206c23f663a8c4baf4819614e24a83d29a5ab639cc3006e642d403feb1e. 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/TCJPH1835218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a696a7b996b6e4a5772a7078b642768b1bc9dceb911dcc9b5e764bb44644749. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPH1835226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae4aa199a8ab774ec97b52df07da419ed87d0037ca3a131155a38904455cb9d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCJPH1835233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38599b45703b681ec78a48f5e430c95395838362407f92211d7fd6571d042ec. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCJPH1815661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f49bfb27b80a4981d7cae56e3e627ca66d31e98734b887483ebccf0378dba0c. 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/TCJPH1815666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43a3fc9dfdafb8a6b3530376c3c8782e31d1a23649bf294a895b464a21913b4. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCJPH1815671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1f12a6f9a88185f53671967c3ff38cac270ce9671e42494f33476d723de2b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPH1815676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6525369b2edea9425790613ca7ef58f421b3f505e3cb506f953766e4f29f7b6. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCJPH1815684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3dba60d6d4e5f3891e3351b51dd5045b2317a6d11424aba833ed0ce09c4fa3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCJPH1815689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4acf6306d550b51a795a52b591322b406dc815d4a7fd99ea832b28315f3bfd. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/TCJPH1815716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f7707e513fb3bbb2995ef9a465b8d08ced2e5a397fd011e362e94224f6a7f4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPH1830875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0970deab90fcc0c7366dd5c098ad245adb0f9e4277dd75e074c2778b77de4c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPH1835073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5871d842239e16c950e0707acaf7e015b844c14faae834dfeaf2ceab0e03239f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCJPH1835075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d72ae3891bc8c2a13870ab45f51d6823be626873e6ff805b1c786195199707. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCJPH1835077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78958760099993573b4c97c681bfbb81676be663bec0d54528cdcfd4d2778c82. 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/TCJPH1835080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afb9a2a406e93d64a377cff4c155fc56e5706131d315eeb289560968e33bf12. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPH1835088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e332f3b2ef41a4bba85096814034f8c0d20dcb63f56f46e5e6b604c8cc6b99. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCJPH1835090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccded1678bb8b00772f02e67e67c9044eb43a1e38e6ae077b018358e6c813eef. 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/TCJPH1835092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f5d9d0cf8f58ff083e8382b9b7f2fb782451a0d683077069628bfb509cefce. 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/TCJPJ1937356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11997189847b871977d83ea404708af4bfe37215b1d8d09ef6b215544955d233. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPJ1937357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e2ca559d01e123434eca2331b6688a04dbb22f2b1dc6e3a88acb01e9bba93a. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/TCJPJ1937358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba73c3f8a188e92edaf822d2e68d599e2413840d6b0262c288f3b0804b56e7. 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/TCJPJ1937359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba197669d03cee3944593a54dcafbb5335209da9cbf65e4ee4de48e98ea6f9a. 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/TCJPJ1937365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a75bad6732d60834454797244821a1b6a18e4996c2c076da3b6d09dd3545472. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCJPJ1937371.