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 0x5a53f95fb420050ebf76aea0714f70634ef76d65b72fe0643c6e3fc16f308105. 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/44589da4-7144-4485-8e12-3c2e61e192f6.json and https://artists.proofprofile.net/proofs/artist/44589da4-7144-4485-8e12-3c2e61e192f6.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 0x60959b29ca179962527d71ade2a0d28d7c9fb65eb3956fad4792fe608fe196b3. 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/QZHNA2393686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827d15bf0a2cb08e3227341618e1559601f7c93f593ba571cbe223e9614a2efe. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWX2333568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db2286efdba473f641da7afec2cffd696196239ac4648e62a3780422332a60b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:58Z), 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/QZNWX2333569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f028d86516578b7f801c753c5ddc1fa64b78ebae6f451ea5517b6364bbaacf. 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/QZNWX2333570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b5c39e37955fc3f5e8bc801d831c1f5dc02685f693087e6a50b42a0dc50565. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWX2333572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c54814f41fc8e75593462371e56915ce32ecfd0cf109b927c8133c544275121. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2333573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04de327b1493240dd5ee626aa0de563c6ae96df5bd8a5d80f3e483f052198228. 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/QZFZ31962639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c4a10a1a4dc99c019a047a0d6ad93beb207ba03b8caf22b9dcd98961faf19. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAENV2376450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7345e915fbd7f20fd139dcd2a97c5ca6df48a7b75d94d1fbb0cf42082948d81b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:30Z), 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/CAENV2376449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917263888aa1b56ae7c888bc0fbb4961b664b080e3d2b7895cc86ced366733c5. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/CAENV2376448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dc6bdb2c414e78a4c634e31c1729be2ac5a028024d68145ac378a84abab17f. 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/QZHN62528457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e736e4e1a3ba0075054bd14241f99bf4a88ccc67541ecc1ec0da4d7309e4ae. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:28:54Z), 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/QZS7J2415012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e31ccc1ad51df9080be724a2fa8a7f7820d5d6db0f3dc8a6fe23a6f31b90af. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:43Z), 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/QZS7J2406481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d8c2411cf2c840741502e4a95c1bd46bdb35ffe0e12779d86681c6453e6c8. 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/CA5KR1980428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6729543e9e3f8819cbaf26ac6b74291567ad930eb01c3e2c0a232074a2fba7. 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/CA5KR2410510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1167ec089798d3a0896512d66bcb698f2729a88a590eb628a8f97fb3e42ff1. 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/TCAII2446754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf710ca57abe98c95a6f3d7f28691166dd5fd7ffce59a0b6a31e83a151b7746. 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/CAW112100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d8c2411cf2c840741502e4a95c1bd46bdb35ffe0e12779d86681c6453e6c8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR1980428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cbfbb5c008663e4e647f848684febfd00d5fa269ac10c3ddbb2c9b99bbb852. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR1837138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b29a19fdeef32152d77eedbda3ef5e738c8ca9b7868527e5cbe7d5eb42d97a. 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/CA5KR1837143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f95e85a2e969219577217d4c02d4ff31393dc671bcdac44125898e534e3251. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAED1987083.
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 0x840f8a3e87769f73577e69163a7b71ef7cb70d8491e2f65abd112600237b2d9c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRX872309141.