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 0xd293e236fc5cb2b4024f2634ba8a5f66a44b4bedfb75650be92cb49a4704751e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/093c51b9-2013-43b5-9312-0a4a7d9b363b.json and https://artists.proofprofile.net/proofs/artist/093c51b9-2013-43b5-9312-0a4a7d9b363b.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 0xef1c8ac9660997aed0b5a3f85e5c2736738ec280b21d8ce473c3760d5213c7b5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA81933505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44a1844a52232d3cc89678b1b5cad44f946adbf567f56f0c2ab53ee2d2af5b0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZGWW2010949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8771272d5425b23ffa2dd0d17dc9d03413e525ac6116ac8de5b1d27e9fdd83c. 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/QZGWW2058673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6f8e31492a3a2d09567b3f611b4f0c9cf79d943207a83b113e674cc1f0e9ed. 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/QZGWW2072217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b73cd68c70f9fc54b2af69df39caa4cddcb9932cb53e32c6f2835af27d9ab4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:18Z), 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/QZGWW2079503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39301831cec472acd3a1f4eaaa9be5ed56fa5db8ba55d2eb46669a0186e55ad. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:30Z), 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/QZGWW2115430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad8e13d4ec1c0b5041828825117a110e817bb675985d8ba5346ff17e7e012d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX1950060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82aaedfab56b9ee64920d1c9646516c42df0a973bfac17a234fb5f88224a19. 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/QZGWW2133689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fddceac30bdb8d449e07bed85ebd15d851dc7f3e21e4c891009881d1d78ab3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZGWW2136883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5da764a3b15b94003007f50e50f94e4d83927adc19430af56024cc266753b. 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/QZGWW2141030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33dee6a98ecae7c207621b915813c566d692cc15c59d94387641a3aec3c9b92. 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/QZGWX2000567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab1f1f51446f8ca969565226b9096f926e176a341a8682109a74db441dd9660. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZGWX2008536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de7d6a7bb63497d420ff9648b3ec936a4b0932069364d5faa2efca82d01239a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZGWX2027429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743285a9d537c503caba84df82e32a59804706d400640abb1d99ad9b0221211. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZGWX2042999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad732ac63379e92b2e7c0280846d06abb4fd5751fdfa878c6dab5658cfcaf3d2. 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/QZES71915851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe161ab7858cdc09634d29e55e4690a6ed25595ff5ed9e039dd7c78136455eba0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZGWX2065659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ecde57405bac87150ba7a3e5bcd4c7cc8ea379a799273300a4d688f3eabb79. 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/QZGWX2067885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3297fd2b861afc6f25060773364192efaf2eb2a9ac7ac1ff4aee658727fdcd9e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:24Z), 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/QZGWX2071993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100e3172429e8507654c6db189d19680e5168d5e8bdd54d5272a7a2e14d632cd. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZGWX2095111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4c55c509d65c45cae1199b998bd9cd90aa3bdf316c817dd23464e8afd0b7f. 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/QZGWX2230111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9e09903c21e1422ea683a43790aa6c0a0ae44ef749ac613d35565be68cda29. 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/QZGWX2250260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef7ad1efa494b8433f36a2a2f98c8f0fa946b36eee40a1a731281094b4f70c4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGWX2250261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f98d2b0db00af910ae31b4a1581010ff241fa4b27a3a4bf2b845ef9393a9cd. 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/QZGWX2250262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb576529d8c6f5068b7de743606388874a57a055c043effcc91fc84a765d54ea. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZGWX2250265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e42f583147138505188adc49dcc34275ea4fbd33cfa3c93f26e53151caf9e1. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZGWX2250266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5402ad0bd7bb754afd604af518ec5074faf7bce27dd00a89dfb87cdbce032454. 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/QZGWX2250269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c94fc001bf066df0761baca8c0572fe924c5b772473c214ced2c059c3fa5a3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZPJ32396573.