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 0xdb0b7b11cf1fbfa6f36616a9c85e495f890311970f111bd4008a6522d1f2fea3. 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/a1964606-eb75-4a2a-86c2-c015e34bbcad.json and https://artists.proofprofile.net/proofs/artist/a1964606-eb75-4a2a-86c2-c015e34bbcad.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 0x765ae2f57c213838d53064f51444c1e02d92eecab9014e8c62f20834c02639b4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:52Z), 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/GX8LE2455641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4937bb2e8e2e346d27de4d94db5d69b7971967034a6f1da897eeea2b9a16b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2489983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecabbeb71794e531a757f30e3278d2d5442e11bc2d6f2c0959167585f562fca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/US3DF2489988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424742b1edcf87c01a55ee6c21dfa5f959fca777a797a63d72826ea384e49ad9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:21Z), 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/US3DF2489989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8f19d428974a75a868ee406c7045dfef7b918a3a64ee8ce1934984ad2d79eb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:46:19Z), 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/USANG2409726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e8348ae0d4da89e3181eb17e6fdf4be1dadfd15e66cb07029f0c09ae01549. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SE6SA2436995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e8348ae0d4da89e3181eb17e6fdf4be1dadfd15e66cb07029f0c09ae01549. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/SE6SA2436995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5151784e820cf5a9c06ce7deee5dee058818d901e9ea0f11ccd3fdbd5df7c2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE6SA2462025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dddbeca0c5eacdc003da43d552d945d96fddf3bffd57d2383a6f42d02a7e9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6XW2406318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dddbeca0c5eacdc003da43d552d945d96fddf3bffd57d2383a6f42d02a7e9. 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/SE6XW2406318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f017dc4f537005a69cd6918873990bf455c312ac852e55ca132a7baa9421582. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:54Z), 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/SE6XW2402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35f517a388f4c1ea1e1eeffbf66555b6970d61c51d373f2393c225e2b7cb948. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEUD42549675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7c3037cc933620e4e5a2e81c9fec01a7f03bf07130475c18a604fc8fc191f5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU2584928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ce9c35b308fb19c6b135cbcc6248beb6be3882c21457c99e745506cca61ab9. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:24:00Z), 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/QZN882565659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688041686ff3158888f00e1f5d99d96b69279d9c09418e91ef0f29dcd2e0abc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:00:12Z), 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/QZN882562568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d17fc5d147c8194b990950c2fdda9045b19be9bd9bd73730898cbffc68254a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:18:29Z), 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/QZWDW2503020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07aee7350690292bdf7502746d2684d85b77f078be4b194e5eae665eddb9a89. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZN882567267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7538e0c0af987b61907b8a5530044d3158d55e5ff06fcb99e44eb8438bb284. 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/QZWDW2535908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50186ec8e919081175a5aa222ee9a49daa166e4ffd5f313acc8716afb3af902. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWDW2551549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ec27dff7792fcdb9b94b8bcf141f009656e99ca81e77e353708cafeb86a4d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:00Z), 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/QZWDW2570973.