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 0x8406d398ab7981f2776077b49bdcf0ddf300477cb1333d2706265b8c01b7c0b4. 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/f41897a3-a81c-481d-8f4d-283d194b3bda.json and https://artists.proofprofile.net/proofs/artist/f41897a3-a81c-481d-8f4d-283d194b3bda.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 0x81436526c551a70044eb6b079341a9d0273e51dcfad1b2091ae83afdc8010b8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2215801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20fc2abe20045c67ec62b9d9ad27248ee79d81bf5b8bf588d94251b4b08942. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6H2207458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c13ce3921bf086cc83c6de5030017e3d2dc957aa2363c04a80824e38e3de9d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2215804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd864494cbb41c0358f7b7d460db2e8a83496150d9f3d34f9f8013f2f6c44f. 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/QZK6H2215806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611f48f03eddfc0c4d0e0bb1d32506cfd7a19dcb5779043faff53a3a03c6e41. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6H2215808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752346f005f77715abf1a6c19958045743ebd893e854693abd5a39c760f79728. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2215810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9c1fbefcdd269706df46ca32f2b5891d1b677b6d8ebed886adbe1dc39f340f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2215812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc05f5ad505d434baf90133b947d35ae7a1a3e0ed15b008bf80f846f2e20cbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2215814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0123ff3eee7275203cab365334f185c58a1155b880066e2c44fda2b8fc65a. 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/QZFZ22210614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70a2be7144281d44f64d0e7bc0326771b7200d3211ef1e8d648ce6b7aa6aab9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6H2215817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d15c25a97a06eae25b083a1c1f4c9950f3a8d2bc804ad7cbef8fafa982699. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWX2450570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20fc2abe20045c67ec62b9d9ad27248ee79d81bf5b8bf588d94251b4b08942. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2207458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0123ff3eee7275203cab365334f185c58a1155b880066e2c44fda2b8fc65a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22210614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9dc58d92113a619568ea010d34bf43359a0fd61b68c1ef3bdbeb4700a885a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWU2110015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a6326c0be8b5c59490a9896f48b8bc22563d0da08e28a36202530bcc08eee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWU2110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647be84fb4efc44f4ce4842871ddbc75fddae5e1b64cf666afcb2c9aca55996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWU2110017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97ee22cb05d2742ad3b6748645aaa7c63818694cdf90970f5732a82b22af80. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWU2110018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc791312916998669e8948558b4045c9cdfe7b8bbdc7764cd90b1cfb22e67183a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES52104479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5a86c82f2920153469625e10df37e3563846425ce3a5427fa373f9149316e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82166710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe099c252115bf2c5add26845ce492140d27b251d7b8b57af276f58fa37c4546. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYZ2164793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b426572d481601561f7b578fb1376b1fa2167a0681568cd6e6224db9f4837. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWZ2045449.