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 0x541bd4bcf59f28c6260f0bc51c04b9674be473f9a8aa1785e6ff96723322349f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a2ebbf8-341b-40bd-a216-2b87215a6de3.json and https://artists.proofprofile.net/proofs/artist/5a2ebbf8-341b-40bd-a216-2b87215a6de3.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 0xdae3c0509b18c2f546cd30ac7929faa98f68321946ca0474823bd8fa20a7c848. 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/AUMEV2426269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70829f6c1d8c6e09ab080810c1bc40f838bac946a7d0e4351eee5cfd5ee9e44. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/AUMEV2426274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b54ab9869bd992fd19b460aac2c9448eaea0125ae21dc8b13c08b3efb29e1. 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/AUMEV2426275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5f390017f2a7372dac6fc450047f9a85a42bdc91719cb5ed626c009c1eac1. 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/AUMEV2426277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f2329c357b0ba0456f296da0382482b834bc7e974f0323f3ed2d13757e6979. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUMEV2426279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca459adc56187abd0f64959f87261ab9853ac39aefc9521be412d557cddca88. 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/AUMEV2426280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046a258018efd343ea8ba51cb25ce5669285a13a6a742e315e32342f0456b71c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/AUMEV2426282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce46857789e23b418011ffaaa9cc850341a2850080a7d71c12aeef8a0c1871d. 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/AUMEV2426324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c87d36b8f14788d0c94c6725fa109374b480a51e48b813f2a51f3c60e6efde7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AUMEV2426326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5af124e2748b3e77d86ebd0b9d1c746be6bcdf9c72535a261bc4c5a2dadfdb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/AUMEV2426330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc346aa157199f1a5d6c04ed0e3f6f6a3f2e0d26cfa1fe62368c7899e29d2ee. 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/AUMEV2426332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf39e953454a337d346996269f6a2f147320f92aaf9f9f9c8d5b8cbbd004ccf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GXAEH2500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429df744a52d68fdcb3b6f5ab9925cb3b962eeef5241834a6817422dfdd341d0. 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/GXAEH2500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24149bb768dfeea4be9ace440906a318e3e7c36ef5c665c7d14ea00ee87130b1. 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/GXAEH2500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6554debf342b1d5b0f178cafb555548dd8d981ec7c8d5351d03e8db98b84def8. 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/GXAEH2500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757d64b657bd1f2aa3e2ee2a588c6eb4d1091f02e578f3046507f9cbe74307a5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GXAEH2500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f6cc6c0b8879aa46a98b38c16bb2d41826eb8d8a04c6d9bbdd605775300575. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GXAEH2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458102ddd8dfa28b246a2843b59121db95d348573b1b642a0cbda8b5a6c06b46. 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/GXAEH2500099.