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 0x0d6f56c1e082a6795b72d83ec239a992e3db3a56dd34ed4b3a03fc1b9d621116. 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/7a68e989-2e0c-4e3f-abc1-c4b77b5f863d.json and https://artists.proofprofile.net/proofs/artist/7a68e989-2e0c-4e3f-abc1-c4b77b5f863d.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 0x753d9d950454b91c94fdb3e8e7c10ae827dbfd06f855193565461afabfa05926. 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/QZK6F2347314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d2cc4c503308c3924f5cf017e1033354e1dfa1227104040c02b8afcf839a68. 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/QZK6F2347318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e31ef492fe5cd6e608787a07e44df44e4ad0794b9d9c0b385c30499ab2570. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:19Z), 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/QZK6F2347320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53bd23b1bd5c235b63c6f9c467a45c8257534d5ff0d5e1a2163eb589ccd994. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6F2347321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c2eb1547ec82b1e00a1d01a7d07b6a791516eaeed0f4e5745c7d2e206eb6d1. 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/QZK6F2347322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e9a9d1d7bf13c4c330a2f2887f1718c94a1250778f7f45c45ed39886961da5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6F2347323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b5ce0a1aed4df621b7d453d28b0159a71624baded0b9e7cf6f7359e7b68fe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6F2347324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12591742e5b37cca4072b214559d5bac849e951df05e7ea8aafd2a50b529f5b4. 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/QZTAW2359540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cfd0979a51e7ac3521047a3ec6c3d85f50f55dd735c727ab9b1db89567b00c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:45Z), 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/QZTAW2359541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c4d6a906be828bf0585108e73d1b585913d5aaf292f1b17b256ef78e8624c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:47:26Z), 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/QZTBC2385255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc080a36432827bdcbbcb8aa3ad7ec2262027c7b7d046db7ddce049b8ff313d3. 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/QZMEN2464974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6ccaf5651494e43b880c5abad81e26a36449db5a67d632e3f1aba3b915259. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNWV2425702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b273ee5683e899ced6859278e1f902329919151ec0308636004ec24b2d73e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWV2425703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc894781059ab4cf43a65853090a6bd51b3d1bc42a60f58ace27e41ee47027a8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92470959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d6808f7577f0077a26586663a6d511618b046576d454e6e62fe3cf65875c3f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWV2425704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6c6acca21b5b3ace97dff8848d47c96017e65d4594f43f2e8412d7c233d248. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:29:39Z), 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/QZNWV2425705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75cd56bd1899ea847ab06cb8976f5fbb8d8c9a5bf26d7413d04c25cc908cdd8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWV2425706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7541d673e6af7efa3dd5adffe47741cbfad87f960c784010499a4c9d9e7b5dea. 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/QZNWV2425707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c223b1b7df5b4a949fedb9d045b19717095727b0ab31c88a46e8c922139c9d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZNWV2425708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a979061bc666ece990f6791f23c100943ef4f49467e5f6f2bbdad9355b159. 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/QZNWV2425709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8864d31de25d5a5f92d6eb463c4e035f66862dd5e155d5ac41ad98d3234d9. 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/QZTBD2432344.