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 0x69c2cab5cfb15f3ed419060b5a2d4e98cb38b763fcd669569aa5c1951cd3f58f. 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/0b5d87dd-0159-4d47-86e1-1734c72626f4.json and https://artists.proofprofile.net/proofs/artist/0b5d87dd-0159-4d47-86e1-1734c72626f4.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 0x39939d205b911093879db900e75a8fb8ae20b2e08b764d6f1822697c5bffee0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLS762300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921620523b43cc60830064b9b143aaa1e24d624487546b529a155197b39f5218. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72200517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684256f46fef6bfe0fa99137faea4bc45ae7ef6cb67fb22363090f50d1bc67d7. 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/NLH2L2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f2ddeee71db94358cf06108664af5ebd985b0b7748136796433dd130b813f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWY2463422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0147966cc8a01ad3e79c80f92b4aabf17400e2188a33602c9de7e4c1abc34ea4. 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/GBKQU2411661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf8b764723fcba3cb14e9b8fd9c5ce3c456052ac377f64cbcfe43456a46f26e. 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/NLS762300811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09797cc65ac536f6314992a9c1a4dbd13b05c17ec197de52067818ac40e44ebe. 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/NLS762300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e8ed87eaec90b005cd99492def2bbcc23b1af2f23811dd88bf0d980fdce131. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2388420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7bca3f9d8b4aea94d5a5515f454a53aa73331d32d7ed3c60d5adba0c746c7a. 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/NLS762300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb3f5f9e269364515ee3e7d452758c5eef51ce43defd45e3fe71624a305c108. 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/NLS762300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58daa4d1811eca1cba3f594f6758e58fac3a0fd4d18c351c0a0985a9946873cb. 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/BEB682300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33706f79ebdbebb48c49f7a8aca5464b8e6c471e4cb2c964b8298edca776f04. 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/NLS762300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4babb9b1b3b1fb83bbad64b85b9ed310e635a266f214293331708847e6c7d55c. 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/NLS762300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390935f81c128f032aab4eb7531555226d68ec62341aa8c29f8c3038422becb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec601726e0f139f8256e612f134d295a3e65c9ff1bcbbcf85d22115574a42173. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb997784dd979600672124e0daa93b779b8f8779e87104e4b5de6d473dca6b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428c5f078a20e9f275c6371373ec93bb9f9d3016bfc8ac35dc16f2c62cebbc6. 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/BEB682200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c15674bc3e0ebe9b78fb2da84a4aab85a4c7544b13af782500efa8a7b9ebb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLS762200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba104a0386cd16138042145bf492b2ea61f46f9862bc1f41b560a0fd69770533. 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/NLS762200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e8d4983d4c941d1f8148571de16da9147108ed4ba0e961a2d5583554dd7108. 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/NLS762100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4696edd5bd09a99d8c2fbed6bd11ab91d348112007f1725fe30ee591471c21c. 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/NLS762100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d09b15fa61fed5449bf6df9b3aeee8c6a823e2dbae3babe55208f2377f045ca. 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/NLH2L2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f012d9e7a27fd06be15837fc722930565b98e820294980a5347ee25bdb8d3a. 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/NLS762100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa65f18bfb133fa9a19ca7d7be0ab0bba0cf0358fd109a37b2cec82729f684. 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/NLS762100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f70db0ea366583879828af3b185e973aa74428aacb3b57df2eb0a69ec23d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac73e56fc33be1b69955e422597d6df5a83a0f924945196585c672e63fa7c46a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLS762000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b4ed29c3baccb3d688235deb19eda5596eabd336404a384f702f9191360ff. 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/NLS762000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4714951170edc8d60cd20f21ab2e8efbf3a6837651e4956f7de538f7c9b3df. 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/NLS761900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dff95df6357a59f8cdd656135ae28a7faeaa8423d4f9d14d1ca98422561d42. 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/NLS761900521.