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 0xd2e449bec48f5fe3605abcae8731b742a3cbf2791a6529375c95a469ea32788a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2590632b-006e-4456-8e99-d8ae04035c6e.json and https://artists.proofprofile.net/proofs/artist/2590632b-006e-4456-8e99-d8ae04035c6e.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 0x0834244b9b9cd48060e13323783fdad7848c72397ca3c68d4e7a06de2f5ab98d. 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/NLRD52340422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaadd83f4a44f5921c0c71c8134833abd579904f6a2efde125252ccc86a4a3. 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/NLRD52352671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d39677b8d5046c8de7f86ec85260c2cb56680d21557dafbf8e0ee041f2f610. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD52352673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213c7c438c045fb66543e4cfce6f2957b1d3e5caa36499bf9a77c79e514fee0. 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/NLRD52352674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6008ad73a039f50bd1be9af83f97d2b57648517786ddf959224080fef90d9. 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/NL8RL2443530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43088dc590ea71bb5f9bc90bd32f27f6c1da1e5f0a057aa28ce4b1911c565dd. 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/NL8RL2452681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb821b4c05fdbc7215796a8e1ac87bce7b1670ed29ebbc69c4cf6252f42f52efb. 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/NL8RL2505414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6008ad73a039f50bd1be9af83f97d2b57648517786ddf959224080fef90d9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NL8RL2443530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73cffc515502665e8f84dfe27e8a8bf10e5e7ab7340d6894a2b43b99fc2a58. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:28Z), 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/NL8RL2505415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43088dc590ea71bb5f9bc90bd32f27f6c1da1e5f0a057aa28ce4b1911c565dd. 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/NL8RL2452681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b2e0f863e423e5be297221c1d283cee80f21c76474954357a692d26bc0673. 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/NL8RL2505417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2517ed21150fc420ee69dcdf982318445eedc29574a904f2ee62e42fd788b813. 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/NLRD52352887.