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 0xa36c4e397a1f1fab97c5bcd83e63ff8f6ec3d4ca6fc4ce455f0070338d489fb1. 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/025778c9-8499-4779-831a-b0cca5b813d4.json and https://artists.proofprofile.net/proofs/artist/025778c9-8499-4779-831a-b0cca5b813d4.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 0x3194247a72b9536599e62b9672abac81f7c0d8310a87d38c5973f06fc88eca64. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:41Z), 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/DEQ121748523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928a8143a1f3d9bc09d9b505b728d9b7f0c5775ead6f9853b5d1f645b7c2e31. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEQ021800982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799a725b3f548e64f49ecd527518bfe7cdea81feb31ff783c6ebf40802db5a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ021907376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64071bbb8e73609e8933b9bbef5aaf955f4683677897aeab1b2ed989499115. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEQ021907382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb37e4b7284fb41de008878b98efab6a18b7a609868c3f3388c3a8c4160dce18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2246808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e4af1766b1f96e5839de715aedb7f134085c8dce1936c475f90f6e621ba55. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB52275756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e1e75085fb115a53ace72c3be71d96abfcec36066fabcc46c583138ba64d69. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB52275758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaa9b1460e73b75f6f2bd4ef8979401c95ee39bd7e867e014fb0f81b968af97. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTB52275759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a24874fa0602c1b115dcf89a4e11302b6f4caa335f5661eedef83cb6493409. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB52275760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ebcb4ed52fa4717a39076da7a2b90dbffb54390333dec22f96c6e5018a0b78. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB52275761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c31cdd8c6b3490487aec03f35f019826a30e94e4d18985e489ba8b5106a0ed8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTB52275764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233e24c51d650b93ca6f08fab8072bb555dd317753ae28e6d2165a64c018bf9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN32575166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaae43be7e5fad123f9c41f5d0a1a61645fad958ee930b3eb7628d66d35a9d9b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWT2571681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf564993b5d7089c43ab3334a25f9029f6f613e6a712c2a350240e1f3db195149. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZNWT2571682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b1e577bc5d9aeff1f3d54a0733b1a72833c4373e050a809e07c9d8d643d40. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZNWT2571683.