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 0x71e565c94dc23edb70e661f86ef8439f73478f950bc31d4dfe3304aa1c9bb75f. 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/31408c7a-af0c-4e32-8a22-a727388c3ffa.json and https://artists.proofprofile.net/proofs/artist/31408c7a-af0c-4e32-8a22-a727388c3ffa.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 0x09c5d6a6069857450b8ed5216cc671990f6953d937d453bc2c06a0b373e6b229. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7N2405071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a46a2a3071745d3f42c27bb403c2662315da8cfa690a8d00e87f58b99dbf69. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7N2489217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de091d927ad4a83d3faaf3671428e8f4e3f508405e2738ab543a24952340fcf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:08Z), 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/QZZ7P2432544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef3970a687cca80c4845a2d0cf924c9fae9dc14ea22ce46cfd867289fa9e8a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7U2466097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05b1bcdb1814f6bd3156aea9c407064c2be7af0cee332ca92863c7cb127aa90. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:26Z), 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/QT3EX2411438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66556c53983fba1c1be3b18bb55a358c5df06918977d8ac371f1850495feb30. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZDA52582340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5878b503da25510dcb5138aeb092b1e560c1db842db4666056ae80d5b77eaa88. 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/QZZ7N2511008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e794551b997d68121d839107b30edfda2ef87cda4080e943e31b7b937ebb39. 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/QZZ7N2511043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d25b80a3d0c17eefb7d2548da970d931ec76cbe5b9223a38559230d1dac65. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7N2516062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2abdd09531a5cc75c39fe458b4080d93670435cb27f33280247271e5c3da5d6. 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/QZZ7N2511005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61695947972dc3fa373f08f12b717da78f84d8c7469bfa6e37f8bd5d9b474cb. 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/QZZ7Q2574856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67a0d65085e0cf2c7d003a6e5620207436d74a9d5c94f866ba82fe8d5afa10. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7S2571252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb91624afa17ed9ea635a0e6c491df5889aa0970f2f83788dd69fecde3dd82f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:00:12Z), 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/QZZ7S2571062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5fabd684768849dd0d8fd371c4a0eb63f1f8addafea255a0f2dcb411699a8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:10Z), 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/QZZ7V2571283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd4d46c427894ba0e7ee6f6dd78c30ed4264d5b6e64f50b7259b58ce279c84f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:20Z), 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/QZZ7V2573674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a80771dec08415ded3faf20853f72a8315eb5e9fa6e9064eb0b3929553fe2b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:47Z), 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/QZZ7V2573678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a85b34551611969932a54a05b64507aaeb5e0ed0e401ed199abc5aa59873bc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:43Z), 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/QT3F42527894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64146c09eca1216a9aee2a202c994fb83e6344cdcbe06af461943343a2aff84. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42527897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938d381f232b972af576581bbdad1068f26137830cf17a2f78caea836acaf9b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F42527898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f155f3fa6effccb2dabf568e6ff8fe311efa4b7cc210f066219bbb8acdca5a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:06:10Z), 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/QT3F42527896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc88e365bb82fc847e286f1ca4215f8e41f61515ddc6264bedb69977c7b6e8fb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F42525680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f700f52c5f62097b1844d64ba2cc68c05e73fb71f2db9b922c5d361653a768. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FF2579924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7a241a9e489d792bbc63fc9ecf24f1bffb937f2422e931e32103d77e1dc36. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FF2581969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7af3692a88ebfeb4ada83e3afd845d6d106b9458e94e1f3d982425affed20ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FH2540490.