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 0x4d2a6b955d2d4816f1675050321832cb6c138b382832729052e840213ed167cf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f80ea7b-472e-402b-a1ab-48eb81f48c26.json and https://artists.proofprofile.net/proofs/artist/8f80ea7b-472e-402b-a1ab-48eb81f48c26.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 0x83d48dd11e6e57d1a8f1745387238aa7f884e66328e04314e67e91132a6057f3. 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/ES64E2419383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3717e01530d51c46d91e2bc149590c1b31bb07c3b486c2a68645d7028c5f7e31. 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/ES64E2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63482136ebc5027e43b0e551281d067c9f5a49887761fe6168d710e49d07046. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES64E2406828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed98b6ad9a7ef086755a764fe7e2ffe4d340864f85ce3e3ff36db3f734e492. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6SA2424382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e9fdc2c8793d54c24c61ad3ae1a0e3034da70afe7a1971843d98fcb73e71d0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES64E2499623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe225c5a40c60bc386694c7128eaca247b72683a47cd3f3e989ba11f5a6947171. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES64E2499625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430fd53a60f34ad1e549d308d29ef6420e4a4b5283dd5dff04fa94238d744d4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES64E2499622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a786f12808691947e8539f87d97ad37e54be80a4adfd34d9e63c662eec066. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES64E2499626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed884670d328929df153e54a91a055c4d079aaf71d98c85fa14a9d3a53eb79d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES64E2499624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927206e5458fc37d64cb08f8da65e224c4d1631b19125ae17531573c86412ffc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES64E2483626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a832345b26609e1eb6022ba4b68ad926b56ae265be11d068048d9e0afcd54e. 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/ES64E2343148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7a1f37862d6c84ff80e4e7e5ebdbca55bf1ec3188af2be78f3a943d996346. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES64E2335167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db5397835ce88af22466713483740cb96e2a135f3d2f0a33b1902f9bc0ea88d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES64E2328380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f07a118e457dd33c7c4ce31457058a969d3bd5e25c52d17dfae7dfdf5397bfc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES64E2313015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f0c72c075262fceb004401b21e1a33dfb00ee16a8604b3a2b0b8f061f75b9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES64E2307459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a16cfd1ad9d05c80c151ad57c4769c69eb4b447a958936f2c3b1c25c2cd9a. 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/ES64E2301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e7d10455307c48bde4b58df94196679b6f46ac40fcafb4ca9b37c676d214c. 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/ES64E2206073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2691cdefae85c70626b44e06b5f536be2297d8193d5be3658ca79ba540eea. 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/ES64E2204307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3fe5940cafaddcee3ad953b409dd63c69d111073522caabd2d5cf71b0aed1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES65E2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767917fb0a925028b2aa44e77b076c839113e0b299d1961666ddca1b1ca7df6b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES65E2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08db4b7efe63a3c730430998e0e8c8aeb049c58acb5a3c5ffdcd178745bea1f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES65E2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4effdf75a283cf3104711e7dd1522faf90c752564e1eddda9e5c23cc804367. 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/ES65E2200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cecc2af76bbd8e56b6bbd4303867c95fbf6cbfb9d01ecff8eac5657997a18dc. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ES65E2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08db4b7efe63a3c730430998e0e8c8aeb049c58acb5a3c5ffdcd178745bea1f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES65E2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767917fb0a925028b2aa44e77b076c839113e0b299d1961666ddca1b1ca7df6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES65E2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaaeee3a435b1370e8babb72b854e0da68b378af7e907536e57ddfd243e753e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES65E2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2109613e4cffb9cf6ed8599683e0dda41b876d1d41438d229ff5cbbc629c1e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMDA62163485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856de3a17f47870ce194786a1b501ebadd6b4822100b823c123b728db6bbfcb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES82169294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3858a6957f129f7787343e09dcc413e9491e6648d73f8f2ca12c221c33e953. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY2167707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf454a90a3870276320f7c4cc0f39a88859c165eee9cde8768bdacbdde99a5. 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/QZK6G2030274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9e7a9631a29d50d0ccf8ab63ba331560fec91f6c85660b1a9d9c17ab619302. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ52146950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f084212e08557de8e52e3f346a7e4d2806bf0c945644dd4f80443d2a65d721. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ52130718.