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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 0xf49731858cccbe89681134bd4ed603a1068537cadd18f03401319927c2966dc6. 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/0a497122-0191-4a58-92aa-ac8c5d6cc570.json and https://artists.proofprofile.net/proofs/artist/0a497122-0191-4a58-92aa-ac8c5d6cc570.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 0xd2b56b0efb1c730abbc80129f0789f00c0965956a24348d91b4aa64c8e8158cd. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAEY2055287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3859649d7cb8ed277ac8a0dc6423195f5c560b9a23d896a5329f1f4a2b1479e9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAEZ2045844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7312ae823920099e51eeb0d681a1e1aca79cc43418697457b0b504e0933c60ca. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAGO2293930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761f409307bfc7f42f6d71b166fae3315f928c4be2d347a23dbe3e7ff6097fba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAFC2078971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056cec66b3c7be0911ff2f35a438f69a3e96dd32c1093646f76b79203ddc95f2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAFL2107587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438f5701d94bd0e29001c3a6a53471915e9fb464bb78a5091568581315ad9d0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAFR2184357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cfeea12bac186abe58a547863f49f10a56a4f670fe37f1d59b7af5aa3f8ccc. 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/FR9W12226765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53b5206894237757c054ede2a264a9cc98d4c73e1214d91d67ad47eb8b80d5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR9W12226767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d787fd043255f6cb56d33e4a3b0aa218ad2eeb6a732b5730146ed3483699b2. 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/FR9W12226768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868ebbeb1dcb63234c10ad31299bee8dac2049513c1c21ad47315d56a740a50c. 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/FR9W12226769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e8195df1b7ae091874f0f4d082ba0981ee986f668ea1141e4eecf8a168746. 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/FR9W12226770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b5e1b46cbc7274312f93393f95a92442566f7227db3dd0e74db477b7a6979. 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/FR9W12226771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4408c3a5608b38f0407767478565fba6ef94b2a1dc3b8ab2de3ec8ea48ef8d. 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/FR9W12239048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9de02d3a38211521c11aff526cea98063875d72899c407adb9f2e1dbe591e9. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/FR9W12239050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dafa98f9976ee73bd7d1d2e7390458e267c3757f91d27fb3f51df67c138e67. 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/FR9W12305480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485410391c1a6b361479d483ebd9793de14d140ea71ce2592abadeaec94affcc. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR9W12305481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073fa29d82e9efed942f24604f7ee6700bbeef961d61ce5dd2a3992bbb638dce. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FR9W12305483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62699fc217251d6f577387a5b868c6054840d491ed8eb1f841b7f5e5cee300ce. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR9W12305488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536e9d45efcfb39b69b3981fd252eb9a3a50b01b63261f2212e9f0f18751f155. 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/FR9W12305648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c44d83cfb3f451e95324732ad833bdc33297f86ac9fd18cdbf72c7b3ff5bcb5. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FR9W12305487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbf77f569440c1bf98b785f638ead842baac5d30b0fc2750b56c1e6671a84c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES82428279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb212384d01eef731f39b645f4d64f261ee7759ba8f40c99fd7d80ee482705. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6N2430051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22dfff7b1b1513d908f0f61e3d8b3e21afb3baf2471dcdcd0b5a862a33c7b8a. 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/QZMEQ2473229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d08560b3880330b4ea6b3844ce4dfb9283ead5917c4e176c8e6d7d62d5d6c3. 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/QZTAU2126108.