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 0x07a8a6a6eb3e7987a70a29fd6f8e3d5ae10dc82d50d4b630444261fa6e226290. 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/27c38279-3701-4e31-b674-53db0a7ffed0.json and https://artists.proofprofile.net/proofs/artist/27c38279-3701-4e31-b674-53db0a7ffed0.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 0xc3181a9622f30ed74893812a708a87e675ace58fb151b690ba749a8d370e35ee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBSMU2686002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b06a7ecf55bade8fbbf41aaa91bbf338066052914af6cd6ef52e3dc7497042. 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/GBSMU4924242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c903f5abe185ca55928732060eb4af89ba1b13b2dcb7982562938ba140bc033. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBSMU4924243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41144a2d584221dab46022747fb081427c02a9dfca8ab3f5a73cf21cbc63638. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:23Z), 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/GBSMU4924244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab513cad6e16bc313bcad56ff3041ec1112123957b04ab8b617960f6353ad4a2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBSMU4924246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67734a22e2abaedc5b5e02310bf226b782e777fb9fee9d840e3b6bc64cf5b738. 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/GBSMU4924248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f986fe51ff3934c681bf0400d54e2b9be03244547ffba492721776c9a864433. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU9120353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bba54dc33d775cf877d405a878567b5fbed3ea3afe13e7f0441dbe49d91f7f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBSMU9120355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3289dc15ab57b3df18bbf0c8c94dd327a3f96f383a847ced033c86b41c60563e. 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/GBSMU9120356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e67879ed8b55933b766b3a6c393633e51b0bf0aaef8d0502f8bfb506acc92e. 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/GBSMU9120357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066165278004e60f5a1efa812d2a79e3d0fef0a1b0685f1b621217fba17458d. 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/GBSMU9120358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49628b2dff9acbb4af72ece3b6a738c4ed2c706c6fc2f883fbce2798582bc24f. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZDA82459461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040639d243ea2ad14d3f9bcc08c9f11864d2790b8771864cb0d96f79f58bdf3c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:45:46Z), 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/QZK6J2493350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f46f7c1e1ea6612ac7d20e97c8e9d6197924f3a3365fa99be06c51f13f100. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:24Z), 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/QZK6J2493351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc3edc9039ae9ecba9cb7079f391785b6ce156e7520afc3bb781f6411067a06. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNA2432419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6192a61a64588fd740360e215e4b01c41a980d98427e2f955ae4575e8ee3823. 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/QZWFQ2371420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7197a5d2f967a5f0fe69c3c5a0315fe91a0ddcb157c03b32b76e794ddf61f8fc. 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/QZK6J2493352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0f0ea9f5b16ad0d918492e48d88439973f8ca7b1e507b894d39d60da9ec054. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6XS1601993.