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 0x0f572f2a554a8804a71b741d382cb45f94c0e88a76c760635bb637754f6be063. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/829510d6-9652-424e-b941-3fb4a0c8698a.json and https://artists.proofprofile.net/proofs/artist/829510d6-9652-424e-b941-3fb4a0c8698a.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 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 0xff7224334d10c24eea12d6a98de54c630a713c510665f837766b7e0d1173da10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ32103485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea86fd2f0e4b773dbeb590ee61b7750cd0710aa425eed1e14972cd4bdca4d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ32116297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ebeefe13c4540d4ae1d91a7396955a4f52d3d495ea3faa77afe119ef892289. 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/QZFZ32116298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95037902f0472e43d7cf1e7877d4177314da228a54a39211e7963e9638b49c23. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZHNA2131097.
Barbie in The 12 Dancing Princesses Main Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093b48d142197735ff4d814fb54a2d2b791232d83b58d365c3fc07b5092ce55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNA2249536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92d7c1f8a2f6f417a5bfa33d825c757a3766cdadb70f8ceef284d2d382fb6c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTB92366169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf12ab3bcdbb61ee91988b4ba0c5c76883b1e272948084ff6d33984ca32e41a. 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/QZTB92366170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb58bc9cf83c50f1b217680e2b51c53e8b84454bf8fa8b60392933e1de1c8b5. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZMEP2528967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9e3993392e29ce5b62969d51c528e6af27ced108cfdae55a1783feab87c2fc. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZNWT2513740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766a19aa99d8a9439c8cf97b06d09ca40bbed1807b270d8045c3bfcb56a349ea. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTB42550072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43fb2e2281c6525b32659329db6ab1fc26927d84a54db7880653f3da86abb5c. 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/QZTBF2573547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe166c3a3e7ac0aa3bd4b2d7d2471f2bfb567c63f0d08b0c3f4c85e53c587f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ772567867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd253ed0a26eecd75ea4c70058a769d8049ce0e3e692c23c3bdea65ae5342b85. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3FE2578529.