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 0x71296a1fbd94956ad9658012d55499f59162d6ad5ca9b1c6008d25913de63a9d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72f42ea1-fcff-4c22-9817-7af30de625fe.json and https://artists.proofprofile.net/proofs/artist/72f42ea1-fcff-4c22-9817-7af30de625fe.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 0xca3ce5a870da73b6fd481d393d81742956bca77970213448e34e5132c7ccffd2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82463801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0c49b3076f496edd4b04e424b09088bb3426047413893147f8c8f49fdba36. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DERH82463802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea26666990c6f677e9b43ba35c1e1e8c94697385779cb61b0899e753b0f2c11. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DERH82463803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe627dad62c60f36ba05b8c378c30b6830ef200551c16a62c5da0ba6946bbe0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82463804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666be8eb171112b831e9316fcd1cc9e47c4a305ba81df41dae51359c0b60d255. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82463805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5755a8077af06d5413eae9aed51820050c183d86fc1587f6273fabf390e163. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DERH82463806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f997b8e4157e33cd469131e641aba2f59778552d51c2f707c2f6526466e85bc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DERH82463807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe75172f8dc13ff8d6e3bf91a751cf415e6d7eabe3ec7e1201daf8392e398048. 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/DERH82463808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31a4584dac953142886d338739fae2ba107a41e8e76c83f47c5358bbe8116d9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DERH82463809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4fee65af9dac2aa01c41593ffbf5357cbfde05d48c304567bcd5069cbb405. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82457202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9352e0931bd0d7c63cf992862e63c2d7cd1254226ec9013b1f15388f6dc23356. 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/DERH82457203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaee8462ab68e309c9a2acd54f7ffa2d52461cc0e664cd1e0179d50145b7205. 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/DERH82455606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2533cc28074e0ac9fd5491855968d51d53d67a5d7bccd502106e519d7ed088. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DERH82455607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd6a64dc6cdd5a73ce4122d1197a74fcdc5cbc5aea00c1ee0a791ad40c405bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82458101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46817258bf314569443d2e1dd7e95cc2ca0f15a5835a59d3c643e5fa872fe3. 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/DERH82457701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4717e3ef98325c8e970620132dab1d5b9bc73d17e855d6d5d85fe5a6d8a499cb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DERH82458601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a1fe25ef6a394c49b79e24f6926a60644e81b4e34faf17c9636919ee59c23. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82459601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b363f1c6b28d2418e66be5ed7e894a443078ddd86fb78caaa28bf49b8ee2f0. 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/DERH82459801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dfa5d06d992b91246ad047720b618ae23bc36fcf42c7d796556de735147dcd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82457102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d49837f1ebef8171fbfaa7e50f00fe0f9cad784ba417f71df65e30367910b9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DERH82456201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906c0094facf868a84ad46cf4e105d1e8e20736aef904e32c7a92249d12d5bf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82456103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4695950acd1c8beb25ef52edc4574ce0f9767042472a676376ad66130a184e. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DERH82455608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbf128dcfd25c4cba7a04ff563fbae1cada46b6e500113eee07c335c06a7e9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82349803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e7eb4476134b6501027e06fa2b3d72c71d8d73742a0cda7961c2a7b8ffb5b4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DERH82348504.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded716fec0793e5a424878f01be3cb95ad13b3bbb9e3e4002bb70f4368f13077. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DERH82346901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427f643d0ded8a8910227e6048168657e7793f0842f89738fe6e243cb9991212. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DERH82346801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f299f20fd3215994bfe7cbb1bca55040aa92b1e1cda5f3f46aa844b1ca4842. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DERH82346001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82beb293ebe0a3e42c2c7c527cae930a84f93357dc9749ef6f2d504d450f2e22. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DERH82345701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e3dad702e4a08f7a40f4db5578bd25f3b8b1b933f6e50352fd7a82090a077. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DERH82345602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80883a12755e21041882e096cb4e2b1d10f41e8d323f6b977de22bee6b686b01. 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/DERH82345401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1042cd3ddafbabfbb1dc7ea51b4854499e3ae915c55ec83e9c3d859dbfa5d8d. 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/DERH82345301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64c4359af8a138dc65450b924772204902aff88eee8dc9ff22e2ec466ebf970. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82344303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb713bed0a8a34315b74d5c3285157e2a7253bb4828eb43f6a8e132ae0713ac01. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DERH82450506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362abef7e27ba0ccd9e03cc6055def942b3b319630375da1cab6d83c836cb636. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DERH82450604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e3ae4070fb32136878816245dc99ce46469bd7ee7d59193b29fb567f5d87b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DERH82450709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9da9d6c5d7d6e8bc3ecb6f1ad00175add2db6953948e2a2a3d8c55966bd9e8. 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/DERH82450806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269790e2f10af70c66c8e135152162e00c017860146bd09a1e2791394f2dbdb3. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DERH82450910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5beb01baf40a85b493eef5be0c7af06f1345a4b44d3c24aa6b8b49010463193. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DERH82451101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06668c19caf0db3546d856f2e2ea85cce2f8e71fb136528725f2e117ab6f1c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82451203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8ecbc60a4207c8960f938ec5df00c35b49df3ed5d7dc9900b4f0d32e0ae90. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DERH82451407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16688136586635d846d0fd3853c63315dda590c414e3e51c09d3954463d7eef. 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/DERH82451704.