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 0x2dc7c4a1cd4be148cac88514391c43541651fd61601a66cbbee8813f86658502. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763b0f80-3019-49bd-ba85-9753444c12c8.json and https://artists.proofprofile.net/proofs/artist/763b0f80-3019-49bd-ba85-9753444c12c8.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 0x7d76ab7d79bfd2aecae2a157c8567b90cdb1c15f2b7f1e952f4c89972174f342. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2046037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc2f24f82f1c12987635e5cb92acb7807f202d1633c1bc327515e5b7803134. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:19Z), 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/QZGLM2046038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26761da9471915bfdb9ce83c7cccbceb503eb248e917b346502c750f1bdf9b64. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:16Z), 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/QZGLM2046039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c9c3e579f7212968dd3196fafddd475b6253a42f185c009ec013aeac97f3a. 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/QZGLM2046040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50eb064a8f63b686d283217073d7fa9c19dc526ee63f263d288a83f0f83b0f5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGLM2046041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e51c7e666baf0ccc2b5bafc94412d0adee538df6e3c7f51879d5d479512231. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZGLM2046042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d48ed1dd6ce2f0bf8da29e97e5764edfcfffc50103c519917ae2cd0be285c3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZGLM2046045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8cd091a91c784f819efc508d1b61d3b1dfb0113304dd1f9ca303eda4712e2e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZMZ92355478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a139674cee2020433247ec9405bf67137619841c67f54e354214cf109c25827. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZW9L2394080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f7c777bd3fb7396f371007856746c4e50953a888694b69eba659b68a94302. 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/QZW9L2394082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3627208f574c50b5a15cfb96ad478fe7fd2089963b44438bc4da26ccf8c175d2. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZW9L2394085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbfe01d556e005b7ec8b0e2f766a78f9952d8d06393cd4195099e4cace2a5d7. 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/QZW9L2394087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91da86d7dcf619a96ac7bff6dca2fa9d91d62439b0aa9fc4b410a7011cdcda2e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:18:33Z), 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/QZW9L2394088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d156e5f19e29b9d73f3c30fd2c0cd10d2d814ce779b6186636f988e3cf9bea4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZW9L2394089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fe886b974b00d91cd7bac5c4a9e9f4e0b0e95432cf5b28742b200a50a823cd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZW9M2426513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc899b59f0f0d0186d4f2dcf544535353d99874a252a57204a81140790f242226. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:56:05Z), 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/QZW9M2426516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb612ec13a82e5dbd006bc3645430d71554b3cb64e4db639831061b334b75b5d1. 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/QZW9M2426522.