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 0xef3d3906d4a2fb0cd5f64dc620129ba453ba45c13efbb1cb44700fbc6f9e4b3d. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91f70391-64c5-4ed4-9d86-824dfb31e29b.json and https://artists.proofprofile.net/proofs/artist/91f70391-64c5-4ed4-9d86-824dfb31e29b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Music Of Burt Bacharach And Hal David
The Greatest Hits Of Chico - Toquinho - Vinicius
Ultimate Easy Listening-Brasillian Tropical Orchestra-Vol. 1
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 0x0a3c7bbc1827a2f1f3f3729879cf423f4838c582bcb993fd77329e4c81f1776f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ESA031306231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa400575fc0fde9520e10fc669bc270a903cd064db3d791d24d47077d994d39b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ESA031306211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d62b6efb474ee2bb72eaeef5ac8d90b0f291da98fc884fa027d5238dc45b4a4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ESA031306213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00d5f302c6b2bc833d42f442d40751e75036e10931c0b4c1b8b64140d521741. 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/ITR551415161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e06c68c71be31e3ce0eed49583483a997341ae1647dc2a3d65b7547fb4f52f7. 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/ITR551500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6a098f75346bf2a412e541295f7d31d4fcd355feeff02370553f21ce07748. 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/ITR551315038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1f0bf6b0ef3d28846ce73e0ee503fc37791392609dc2dd858b6be1cd337fe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBBFT0900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2994609cb10bf9e443a6953b38f7f229ff5bb93f106a5c041e4a83d952bffa. 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/GBBFT0900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824834f298683f8d93604d7dee2c8927035e23450a1e737fdbbd87158de75faf. 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/ITR551315091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745a86dd08770a99163dcf6f45726ba5d7ff5b1fdade4ec0dab595ae9ef2cd12. 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/ITR551600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb642cf7bd95f73cbd54563ae408a92aa20b486ecd5674bea993ce459a09eb818. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBBFT0800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971fb4b000053ea7628dfea00778e89405418dfa856816f398c79aa3c25dd75e. 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/ITR551600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7438ba38fee4825cb15ba88e3173361f4ae157262938275d8ee50f1fa49b297b. 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/AUIG01404507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dbd93c947bd9259b0f4dfbbdc44044c3619e848382600c1debd250d2cd47cb. 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/GBBFT0900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c77016ad118df1171ba0dd80b53fd258442fb87f485e068163f1713b3ab44. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRY510883023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901cd3278434cb613d45b73f5040f0eb9fe1e8652f2d76686ee0bfdf1e82656. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUIG01404498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cac67c52b079c0c31d8f7278583712695d0f9d7f51fa96845587861a3d0772. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITR551500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51fd1284ab0029864d8209fd708ef325657532b6dbd10a618807b0948330246. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRY510883032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9fcfa8f8b40b3e9e3338e5a39a4dc546ea3c865c1903b9c6c402062a1af84a. 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/ITR551315572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadcd875875ce8b5390320c6bcbfc0c81b4ce8d800cb6ab86f0d644d56f9161e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ITR551500149.
The Music of Burt Bacharach and Hal David
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fe18b9f8bb22121a7a606b8ecd7dbdad2d8765db8c9f6af62630028d80a225. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITR551415029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dadfd15a58e0ed7a458e3911956fb4ccdaf6cc243070499c28d65f6779a6c3a. 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/GBLFP2409619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3696f2c82efb97899ebecb3a331e90d2d3047c71698c60ed1ed6ba90a66f2779. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLFP2489685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4574ad32ab79024ead89c88bffca6b365eb7f8b81c84c900715919e03da1ae5d. 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/GBLFP2425587.